SELYA, Circuit Judge. The United States Postal Service prides itself on surmounting obstacles that nature places in its path.1 In this bitterly contested case, plaintiff-appellant Michael Pagano, a veteran postal worker, complains that, whatever success the Service may have encountered in its struggle with the elements, it has been unable to surmount a man-made obstacle: prejudice in the workplace. The district court ruled in favor of the defendant. Finding appellant's arguments to be unpersuasive, we affirm.
The Lynnfield Post Office hired appellant as a part-time mail carrier in 1973. He became a full-time employee two years later, working primarily as a clerk at a branch office. In 1983, appellant became a dispatcher at the main post office under the direct supervision of James Walsh. Walsh and Pagano did not enjoy a cordial working relationship -- a situation that perhaps stemmed from the latter's propensity for unauthorized absences.
When Walsh was promoted to postmaster in mid-1984, Paul Hentschel became Pagano's supervisor. On December 2, 1984, Hentschel sent appellant an admonitory letter regarding frequent tardiness and excessive use of sick leave. A second warning letter, issued exactly one year later, cited continuing instances of unpunctuality and sick leave abuses during a two-month period ending December 2, 1985.
Notwithstanding these admonitions, appellant persisted in his moratory ways. Hentschel suspended him for seven days in January (later reduced to five) and fourteen days in March (later reduced to seven). Seeing no improvement, Hentschel issued a so-called "notice of removal" on July 15, 1986 (later withdrawn), and reissued it on October 22, 1986. During the ensuing grievance proceedings, Walsh overrode Hentschel's action and authorized a "last chance" agreement. Although the agreement contained a promise that appellant would report for work regularly and punctually, this covenant was honored mainly in the breach: appellant was absent or late nineteen times during the four-month period ending March 23, 1987. Hentschel discharged appellant in May of that year, citing his "lack of dependability in reporting and not being available for duty."
Three months after his termination, appellant filed a formal administrative complaint with the Postal Service's equal employment opportunity office, alleging that he was dismissed because of his employer's animus against persons of Italian origin.2 For the next three years, appellant vigorously pursued his case on the administrative level. Receiving no satisfaction, he brought suit against the Postmaster General in the United States District Court for the District of Massachusetts.
Appellant docketed his complaint in the district court on August 7, 1990. On February 19, 1992, a magistrate Judge denied his motion for leave to file an amended complaint. Several months thereafter, the district court granted the defendant's motion for summary judgment. This appeal ensued.
II. THE NEED TO OBJECT TO A MAGISTRATE'S ORDER
As a preliminary matter, appellant contends that the district court erred in denying his motion to add counts alleging wrongful discharge and breach of contract. The facts are as follows. Appellant's motion to amend his complaint was filed on January 10, 1992. The district Judge referred the motion to a magistrate Judge who denied it on grounds of futility, ruling that the additional claims were both preempted by Title VII and that, moreover, the wrongful discharge claim failed to comport with the Federal Tort Claims Act. Appellant took no further action. Because appellant failed to object to the magistrate's order within the prescribed ten-day period, see Fed. R. Civ. P. 72(a), we cannot consider this assignment of error.3
Under ordinary circumstances a motion to amend a complaint is "a pretrial matter not dispositive of a claim or defense of a party" within the purview of Fed. R. Civ. P. 72(a). See Walker v. Union Carbide Corp., 630 F. Supp. 275, 277 (D. Me. 1986); see also 28 U.S.C. § 636(b)(1)(A) (providing that a district Judge "may designate a magistrate to hear and determine any pretrial matter," with certain enumerated exceptions not relevant here). A party displeased by a magistrate's order on a nondispositive motion must serve and file objections to the order within ten days. See Fed. R. Civ. P. 72(a); see generally 28 U.S.C. § 636(d) (congressional grant of rulemaking power). If the aggrieved party preserves his rights in this fashion, the district Judge can set aside the magistrate's ruling if he finds it to be "clearly erroneous or contrary to law." 28 U.S.C. § 636(b)(1)(A); Fed. R. Civ. P. 72(a). If, however, the aggrieved party sits idly by and fails to object within the prescribed period, he "may not thereafter assign as error a defect in the magistrate's order . . . ." Id. ; see also Rule 2(b), Rules for U.S. Magistrates in the United States District Court for the District of Massachusetts (implementing 28 U.S.C. §§ 636(b)(1)(A), (d) and Civil Rule 72 (a)).
In this instance, Pagano did not object to the magistrate's denial of the motion to amend. That ends the matter. Congress granted the courts of appeals jurisdiction to hear appeals "from all final decisions of the district courts of the United States." 28 U.S.C. § 1291. We have held that for a magistrate's decision to be "final" within the meaning of the statute it "must have been reviewed by the district court, which retains ultimate decision-making power." United States v. Ecker, 923 F.2d 7, 8 (1st Cir. 1991) (quoting Siers v. Morrash, 700 F.2d 113, 115 (3d Cir. 1983)).4 In other words, when, as now, a litigant could have tested a magistrate's ruling by bringing it before the district Judge, but failed to do so within the allotted ten-day period, he cannot later leapfrog the trial court and appeal the ruling directly to the court of appeals. See Unauthorized Practice of Law Comm. v. Gordon, F.2d , (1st Cir. 1992) (per curiam) [No.92-1710, slip op. at 7-8]; McKeever v. Block, 932 F.2d 795, 799 (9th Cir. 1991); Singletary v. B.R.X., Inc., 828 F.2d 1135, 1137 (5th Cir. 1987); Siers, 700 F.2d at 116; see also Ecker, 923 F.2d at 9 (holding that the court of appeals cannot undertake direct review of a magistrate's order on a nondispositive pretrial motion in a criminal case); United States v. Renfro, 620 F.2d 497, 500 (5th Cir.) (same), cert. denied, 449 U.S. 921, 66 L. Ed. 2d 149, 101 S. Ct. 321 (1980).
Because appellant took no steps to have the district Judge review the magistrate's denial of the motion to amend, he is precluded from contesting the merits of that order in the present proceeding. See Rittenhouse v. Mabry, 832 F.2d 1380, 1387 (5th Cir. 1987) (refusing to entertain a plaintiff's challenge to a magistrate's denial of his motion to amend his complaint because "no appeal therefrom to the district court was ever taken or attempted and the district court did not in any way review or confirm the order").
III. THE PROPRIETY OF SUMMARY JUDGMENT
We divide our examination of the summary judgment entered below into two segments. We begin by outlining the Rule 56 standard and then proceed to the underlying Title VII claim.
A. The Summary Judgment Standard.
Summary judgment is appropriate when "the pleadings, depositions, answers to interrogatories, and admissions on file, together with the affidavits, if any, show that there is no genuine issue as to any material fact and that the moving party is entitled to a judgment as a matter of law." Fed. R. Civ. P. 56(c). Where, as in this case, the defendant has invoked Rule 56 and asserted a lack of supporting evidence, the plaintiff must establish the existence of a triable issue which is both genuine and material to his claim. See Anderson v. Liberty Lobby, Inc., 477 U.S. 242, 247-48, 91 L. Ed. 2d 202, 106 S. Ct. 2505 (1986). "In this context, 'genuine' means that the evidence about the fact is such that a reasonable jury could resolve the point in favor of the nonmoving party [and] 'material' means that the fact is one that might affect the outcome of the suit under the governing law." United States v. One Parcel of Real Property, Etc. (Great Harbor Neck, New Shoreham, R.I.), 960 F.2d 200, 204 (1st Cir. 1992) (citations and internal quotation marks omitted).
On issues where the nonmovant bears the ultimate burden of proof at trial, he may not defeat a motion for summary judgment by relying upon evidence that is "merely colorable" or "not significantly probative." Anderson, 477 U.S. 242 at 249 at 249-50, 91 L. Ed. 2d 202, 106 S. Ct. 2505 . To the contrary, the nonmovant must "present definite, competent evidence to rebut the motion." Mesnick v. General Elec. Co., 950 F.2d 816, 822 (1st Cir. 1991), cert. denied, 112 S. Ct. 2965 (1992). Even when elusive concepts like motive or intent are in play, "summary judgment may be appropriate if the non-moving party rests merely upon conclusory allegations, improbable inferences, and unsupported speculation." Medina-Munoz v. R.J. Reynolds Tobacco Co., 896 F.2d 5, 8 (1st Cir. 1990).
We afford plenary review to a district court's grant of summary judgment. In the course thereof, we must read the record in the light most amicable to the party contesting summary judgment, indulging all reasonable inferences in that party's favor. See, e.g., Griggs-Ryan v. Smith, 904 F.2d 112, 115 (1st Cir. 1990).
B. The Title VII Claim.
Title VII renders it unlawful for an employer to "discharge any individual . . . because of such individual's race, color, religion, sex, or national origin . . . ." 42 U.S.C. § 2000e-2(a)(1). To prevail on a Title VII claim, a plaintiff must prove that the defendant discriminated against him for a proscribed reason. See Cumpiano v. Banco Santander Puerto Rico, 902 F.2d 148, 153 (1st Cir. 1990). Because appellant produced no direct evidence of discriminatory intent, we must initially analyze his claim under the burden-shifting framework of McDonnell Douglas Corp. v. Green, 411 U.S. 792, 802-05, 36 L. Ed. 2d 668, 93 S. Ct. 1817 (1973).5
McDonnell Douglas requires, first, that the claimant state a prima facie case. This showing transfers the burden of production, requiring the employer to articulate (but not necessarily prove) some legitimate, nondiscriminatory reason justifying the adverse employment action. Cumpiano, 902 F.2d at 153. Satisfying this burden of production effectively dissolves the inference of discrimination arising from the plaintiff's prima facie case.6 See White v. Vathally, 732 F.2d 1037, 1040 (1st Cir.), cert. denied, 469 U.S. 933, 83 L. Ed. 2d 267, 105 S. Ct. 331 (1984). Once the parties reach this stage, therefore, the plaintiff, if he is to defeat a properly documented motion for summary judgment, "must offer some minimally sufficient evidence, direct or indirect, both of pretext and of the employer's discriminatory animus." Mesnick, 950 F.2d at 825; accord Villanueva v. Wellesley College, 930 F.2d 124, 127-28 (1st Cir.), cert. denied, 116 L. Ed. 2d 143, 112 S. Ct. 181 (1991); Lipsett v. University of Puerto Rico, 864 F.2d 881, 895 (1st Cir. 1988).
In this case, the district court apparently assumed that appellant stated a prima facie case7 and that the employer articulated a facially valid, nondiscriminatory reason (chronic absenteeism and tardiness) for the dismissal. From that starting point, the court ruled against appellant on two bases. First, the court determined that appellant failed to submit evidence of pretext. Second, the court found that "there is no evidence in the record . . . that would justify even a circumstantial inference that plaintiff was dismissed because of his Italian heritage." Either Conclusion would have warranted brevis Disposition. Having scrutinized the record, we are persuaded that both are supportable.
1. Pretext. Appellant's effort to establish pretext takes an unexpected twist. The Postal Service's stated reason for cashiering Pagano focused on his rotten attendance record and unremitting lack of punctuality. Usually, a Title VII plaintiff seeks to show pretext by attacking the factual premise on which the employer's professed reason rests. Here, however, appellant concedes the truth of the Service's factual predicate -- he was, by his own admission, often absent and frequently late -- but says that the proffered reason was nonetheless pretextual because the employer's attendance policy was not applied to other, similarly situated, non-Italian employees in the same way.
This uncommon claim hinges on appellant's attempt to compare his work record and treatment with the work record and treatment of one Patrick Rafferty, a co-employee of Irish descent. In appellant's view, Rafferty committed equivalent sins but received much milder punishment. The court below jettisoned this claim, finding that Rafferty's case was not a fair congener. We agree.
In contending that he and Rafferty were "similarly situated," appellant limits his analysis to the number of times the two men were late during a finite period. Yet, appellant had a substantially longer and more varied history of attendance problems than did Rafferty and appellant, unlike Rafferty, failed to mend his ways following receipt of formal warnings. Appellant also racked up many more violations of the Postal Service's attendance policy than did Rafferty when items such as sick time, absences without leave, and the like are taken into account.8
In short, the record shows beyond hope of contradiction that the two men were not similarly situated vis-a-vis overall attendance and that Rafferty, like Pagano, was disciplined for provable infractions at a level corresponding to the infractions' severity. In the absence of any other evidence that the Postal Service applied the attendance rules unevenly, the district court did not err in holding that there was no genuine issue of material fact on the question of pretext.9 See Oliver v. Digital Equip. Corp., 846 F.2d 103, 109 (1st Cir. 1988).
2. Discriminatory A nimus. Appellant likewise failed to adduce any evidence tending to prove defendant's supposed discriminatory intent. Appellant produced no evidence that Hentschel, the official responsible for monitoring the attendance policy and initiating disciplinary proceedings, harbored an anti-Italian animus. Rather, he attempted to establish animus by showing that Walsh, the Lynnfield postmaster, nursed a grudge against persons of Italian descent. The sum total of appellant's evidence consists of three statements attributed to Walsh. When reacting to news that he had become appellant's immediate superior, Walsh allegedly remarked, "Good, now we can fire you." On another occasion, Walsh allegedly told a co-worker that he hoped appellant would quit. Finally, upon hearing an employee of Italian lineage cough, Walsh reputedly said, "I hope he chokes."
This evidence is manifestly insufficient to create a trialworthy issue regarding the existence of a statutorily proscribed animus. To be sure, the attributed remarks are concededly coarse -- but there is nothing about them which suggests to an objectively reasonable observer that they constituted expressions of discrimination based on national origin. Sporadic instances of rude behavior, without more, do not comprise competent proof of nationality-based discrimination. See, e.g., Mesnick, 950 F.2d at 826; Medina-Munoz, 896 F.2d at 9-10; Robinson v. Montgomery Ward & Co., 823 F.2d 793, 797 (4th Cir. 1987), cert. denied, 484 U.S. 1042, 98 L. Ed. 2d 860, 108 S. Ct. 773 (1988); Clark v. Atchison, Topeka & Santa Fe Ry. Co., 731 F.2d 698, 702 (10th Cir. 1984). We hold, therefore, that this smattering of offhand comments, spread over a fourteen-year period, fails as a matter of law to show anti-Italian animus.10
We need go no further. We are without jurisdiction to consider appellant's belated challenge to the magistrate's denial of his motion to file an amended complaint. And, given the lack of a triable issue of fact regarding either pretext or animus, we conclude, without serious question, that the lower court appropriately entered judgment in defendant's favor. See Oliver, 846 F.2d at 109 (holding that summary judgment is proper in a Title VII case where plaintiff's opposition, at bottom, rests solely upon "unsupported allegations and speculation").
1. An inscription on the exterior of the main New York City post office, often thought to be the Postal Service's motto, reads: "Neither snow, nor rain, nor heat, nor gloom of night stays these couriers from their appointed rounds." (adapted from VIII Herodotus, Histories 98).
2. Appellant originally claimed that a second discriminatory animus, arising out of his role in the investigation of a sexual harassment complaint, contributed to his difficulties. He has, however, abandoned this theory on appeal. Accordingly, we pass over it. See United States v. Slade, F.2d , n.3 (1st Cir. 1992) [No. 92-1176, slip op. at 6 n.3] (reiterating the general rule that "theories neither briefed nor argued on appeal are deemed to have been waived").
3. We analyze this point under Fed. R. Civ. P. 72(a) partially because appellant, in post-argument briefing before us, explicitly invited that characterization. However, even if we viewed the magistrate's denial of the motion to amend as implicating 28 U.S.C. § 636(b)(1)(B) and Fed. R. Civ. P. 72(b) rather than 28 U.S.C. § 636(b)(1)(A) and Rule 72(a), the result that we reach would not be affected. See Park Motor Mart, Inc. v. Ford Motor Co., 616 F.2d 603, 605 (1st Cir. 1980) (holding that, in respect to a magistrate's recommended Disposition under section 636(b)(1)(B), "a party 'may' file objections within ten days or he may not, as he chooses, but he 'shall' do so if he wishes further consideration"); accord Davet v. Maccarone, 973 F.2d 22, 30-31 (1st Cir. 1992); Templeman v. Chris Craft Corp., 770 F.2d 245, 247 (1st Cir.), cert. denied, 474 U.S. 1021, 88 L. Ed. 2d 556, 106 S. Ct. 571 (1985); Scott v. Schweiker, 702 F.2d 13, 14 (1st Cir. 1983).
4. Of course, when magistrates sit as de facto district Judges by consent of the litigants under 28 U.S.C. § 636(c), they can enter final, appealable judgments. See 28 U.S.C. § 636(c)(3). However, section 636(c) has no applicability in the instant case.
5. In general, the McDonnell Douglas model operates in the same way for Title VII cases as for cases brought under the federal Age Discrimination in Employment Act (ADEA), 29 U.S.C. §§ 621-634 (1988). See Villanueva v. Wellesley College, 930 F.2d 124, 127 n.2 (1st Cir.) cert. denied, 116 L. Ed. 2d 143, 112 S. Ct. 181 (1991); Loeb v. Textron, Inc., 600 F.2d 1003, 1015 (1st Cir. 1979). Hence, we cite interchangeably to Title VII and ADEA decisions in the succedent analysis.
6. Even though the McDonnell Douglas inference vanishes, the evidence submitted in support of the prima facie case remains under consideration. See Mesnick, 950 F.2d at 825 n.6 (explaining that, although the burden-shifting framework becomes inconsequential at this point, the district court, faced with a Rule 56 motion, "must still examine the evidence that the parties adduced in proceeding under the framework").
7. In employment termination cases, a prima facie case may be established by demonstrating that "(1) the plaintiff was within a protected class; (2) she was qualified for, and adequately performed, her job; (3) she was nevertheless dismissed; and (4) after her departure, the employer sought someone of roughly equivalent qualifications to perform substantially the same work." Cumpiano, 902 F.2d at 153. Following the district court's lead, we also assume arguendo that appellant stated a prima facie case.
8. For example, in the seventeen months prior to appellant's dismissal, he was involved in fifty-three separate occurrences that called the attendance rules into question. Rafferty was involved in only fourteen such instances during the same period.
9. Relatedly, appellant asserts that there is a fact dispute about whether the Postal Service consistently recorded every instance of employee lateness or absence. Even if such a question exists, however, it is not material to this case. Appellant adduced no proof that the Service either failed to record transgressions based upon employees' national origin or placed ersatz infractions on his work record. Indeed, his evidence suggests that the Service may have been somewhat charitable in not recording all violations of the attendance rules. If this is so, appellant, as a habitual latecomer, likely benefitted from the employer's laxity.
10. In view of this ruling, we need not reach, and, thus, take no view anent, the district court's alternative holding that Walsh's comments, even if probative of ethnic hostility, were inconsequential absent evidence that he had some input into, or impact upon, Hentschel's decision to end appellant's employment. See, e.g., Medina-Munoz, 896 F.2d at 10 ("The biases of one who neither makes nor influences the challenged personnel decision are not probative in an employment discrimination case.").