On July 5, 1982, plaintiff-appellee Katherine Crippa advised appellant Craig Fox, and a supervisor of investigations for the Massachusetts Department of Social Services ("DSS"), that she was fearful she would harm her three children. After alerting the Crippa children to the potential danger, Fox assisted their placement in a foster home, where they remained for eleven months before being returned to their mother.

On June 28, 1985, Crippa and her children brought a civil rights action, see 42 U.S.C. Sec. 1983, for declaratory and injunctive relief, as well as damages, against various Massachusetts officials, DSS employees, and defendant Fox, for failure to develop and review "service plans" for the foster care of the Crippa children.1 Fox affirmatively asserted qualified immunity and moved to dismiss the section 1983 claim. The district court considered matters outside the pleadings, see Fed.R.Civ.P. 12(b)(6) & 56, and denied summary judgment on the qualified immunity claim on the ground that material facts remained in dispute, principally as to whether Fox was in any capacity or manner responsible for developing or reviewing foster care service plans in behalf of DSS.2

The core preoccupation of the parties on appeal centers on whether any responsibility devolved upon Fox for the preparation and review of foster care service plans for the Crippa children.3 Yet notwithstanding the fact that these proceedings have extended for nearly five years since the lawsuit was commenced, and even though both the qualified immunity claim and the merits of the section 1983 claim depend upon precisely such evidence, only the dimmest evidential outlines of Fox's relationship and responsibilities with the DSS are discernible in the aftermath of the parties' tactical posturing. See, e.g., notes 6-8 & accompanying text. We cannot mistake the reality that both parties have been reluctant to abandon their supine litigation stance out of concern that material disclosures regarding any responsibility Fox may have had in these matters might jeopardize their respective positions on the merits of the section 1983 claim or on Fox's qualified immunity claim. On the other hand, we perceive the distinctly different and more immediate problem that their tactical occultation has indeed succeeded in obscuring the foundational facts necessary to support our exercise of interlocutory jurisdiction. Consequently, we now note our lack of jurisdiction, see Bender v. Williamsport Area School Dist., 475 U.S. 534, 541, 106 S. Ct. 1326, 1331, 89 L. Ed. 2d 501 (1986), though, by so doing, we must let supine canine recline as it were, cf. Unwin v. Campbell, 863 F.2d 124, 132 n. 5 (1st Cir.1988).4

We may entertain the present appeal only if it is within the purview of the collateral order doctrine enunciated in Cohen v. Beneficial Indus. Loan Corp., 337 U.S. 541, 69 S. Ct. 1221, 93 L. Ed. 1528 (1949), more recently extended to encompass an appeal from a pretrial order denying a claim of qualified immunity in Mitchell v. Forsyth, 472 U.S. 511, 530, 105 S. Ct. 2806, 2817, 86 L. Ed. 2d 411 (1985). Forsyth is rooted in the public policies served by preventing " 'distraction of officials from their governmental duties, inhibition of discretionary action, and deterrence of able people from public service [which] ... can be particularly disruptive of effective government.' " Id. at 526, 105 S.Ct. at 2815 (quoting Harlow v. Fitzgerald, 457 U.S. 800, 816-17, 102 S. Ct. 2727, 2737-38, 73 L. Ed. 2d 396 (1982)). The public policies fostered by according government officials qualified immunity from suit are frustrated when "a case is erroneously permitted to go to trial." Forsyth, 472 U.S. at 526, 105 S. Ct. at 2815. On the other hand it cannot be doubted that the prosecution of a qualified immunity claim must rest with the party asserting it. Cf. Harlow v. Fitzgerald, 457 U.S. 800, 815, 102 S. Ct. 2727, 2736, 73 L. Ed. 2d 396 (1982) (qualified immunity must be pleaded by defendant official). Like any other appellant, Fox invites the dismissal of his interlocutory appeal unless its jurisdictional requirements are met. See, e.g., In re Recticel Foam Corp., 859 F.2d 1000, 1003 (1st Cir.1988) (district court order overruling objection to case management order does not come within final judgment rule or collateral order doctrine) (" 'A petitioner, we think, has the burden of making the specialized showing needed to complete the arduous climb over the jurisdictional threshold.' ") (quoting Bath Iron Works, 853 F.2d at 14).

Courts of appeals, including our own, determine their jurisdiction to entertain an interlocutory appeal from a denial of a claim of qualified immunity by focusing on the position and function of the party asserting the immunity claim. For example, in Lovell v. One Bancorp, 878 F.2d 10 (1st Cir.1989), the appellant was a private party, chairman of the executive committees of Maine Savings Bank and its holding company, who asserted qualified immunity from suit for alleged violations of state banking laws and regulations relating to the conversion of Maine Savings Bank from a mutual association to a stock corporation. In Lovell the appellant's "allegedly unlawful actions did not take place in the course of the performance of public duties. Rather, he was an officer in a private company engaged in private, commercial activity." Id. at 12 (emphasis added). Lovell did not "concern a private defendant whose allegedly wrongful conduct arises from acts that were required to be performed under a contract with a governmental body to perform a governmental function." Id. at 12-13 n. 4. Thus, we expressed "no view as to whether a private defendant would be entitled to an interlocutory appeal from a denial of a qualified immunity claim under the circumstances presented in DeVargas...."5 Id. Therefore, we dismissed the interlocutory appeal in Lovell for lack of appellate jurisdiction. Id. at 13. See also Downs v. Sawtelle, 574 F.2d 1, 14 (1st Cir.) ("[I]n the absence of any factual development as to the nature of the [social worker] positions involved and the range of responsibilities committed to these defendants, it would be inappropriate at this point for this court to attempt to answer ... [the] crucial question [whether defendants are protected by qualified immunity.]"), cert. denied, 439 U.S. 910, 99 S. Ct. 278, 58 L. Ed. 2d 255 (1978).

The original complaint identified Fox as a party defendant being sued "[i]ndividually and in his capacity as an employee of the Commonwealth."6 The amended complaint alleges, however, that "Fox is or was a clinical social worker attached to the Pittsfield office of the Department of Social Services and at all times relevant was responsible in his capacity as social worker for acts and omissions occurring with regard to the plaintiffs." (emphasis added). Fox does not deny that he listened to Katherine Crippa's expressions of concern that she might harm her children, warned the children, and assisted with their foster care placement. Compare Unwin v. Campbell, 863 F.2d at 133. Instead, Fox uninformatively states that he provided services to the DSS pursuant to contract, with no indication as to the nature of the contract between his employer and DSS and only the sketchiest indication as to the nature of his employment responsibilities.7

An immunity claimant's right to an interlocutory appeal remains a narrow exception to the final judgment rule, available only to government officials and, conceivably (a matter we have yet to consider), their functional equivalent. Where an appellant has no official (or equivalent) status, Lovell, 878 F.2d at 12, or where the record does not enable us to determine a cognizable basis for the assertion of appellate jurisdiction, as in the present case, we will not entertain an interlocutory appeal from the denial of an immunity claim on the basis of its label alone.

We recognize that dismissal of the interlocutory appeal entails some slight risk that the important public policies served by entitling eligible defendants to appeal a pretrial denial of an immunity claim may be frustrated for a while longer. We conclude, however, that it would be impermissible as a matter of law, inappropriate from a public policy standpoint, and out of step with our adversary system, not to note our lack of interlocutory jurisdiction. There can be no sound basis for assuming an essential element of the defendant's qualified immunity claim, much less a jurisdictional one, when it would appear a simple matter for Fox to demonstrate it unless of course the undisclosed facts are inconducive.8 Furthermore, insubstantial qualified immunity claims, see Unwin v. Campbell, 863 F.2d at 136-37; see also infra note 9, as well as substantial ones, Harlow, 457 U.S. at 818, 102 S.Ct. at 2738, are to be screened out at an early stage in the litigation process as a matter of sound public policy; certainly so in these circumstances where a need for further development of the record persists almost five years after the commencement of the action.9

We are without jurisdiction to entertain an interlocutory appeal from the denial of the motion for summary judgment on the immunity claim because we are unable to ascertain on the present record a legal duty on the part of appellant Fox to perform any governmental function implicated by the section 1983 claim, as either a state official or a private party.

The appeal is dismissed for lack of jurisdiction. The parties are to bear their own costs.

DISMISSED.