Second, since diversity jurisdiction requires “citizens” of different States, an agency not deemed a citizen of its State may only be sued upon a Federal question. The test for such citizenship overlaps the test for the Amendment; if it is not considered part of the State within the Amendment, an agency is usually ipso facto held to be its citizen. State Highway Commission of Wyoming v. Utah Const. Co., 278 U.S. 194, 49 S.Ct. 104, 73 L.Ed. 262 (1928); Moss v. Calumet Paving Co., 201 F.Supp. 426 (S.D.Ind., 1962). However, diversity presents a distinct hurdle; unlike the Amendment, it does not involve a privilege belonging to the State. Thus, even though a State waives the Amendment to which one of its agencies is entitled, it cannot thereby create diversity jurisdiction if that agency is not a “citizen.” Such jurisdiction may neither be enlarged nor diminished by the States. State Highway Commission of Wyoming v. Utah Co., supra, 278 U.S. at 199, 49 S.Ct. 104; O’Neill v. Early, 208 F.2d 286, 289 (4th Cir., 1953).
Next, there is the constellation of state-created immunities, not derived from the Federal Constitution, but based on traditional notions of the State’s inherent sovereignty. By its own constitution or as a matter of common law, a State may withhold consent to be sued in its own courts. In addition, public corporations, counties, municipalities, and other instruments of State and local government often are sheltered by various doctrines loosely subsumed under the heading of “sovereign immunity.” In some instances these creatures of the State are granted complete immunity from suit, while in others they are only immunized from tort liability. [The latter may be further broken down into the traditional proprietary-governmental dichotomy applied to municipal corporations.]
State agencies are sometimes protected from suit or from liability on theories of governmental immunity even though they cannot be considered alter egos of the State itself, at least by the Federal standard required to invoke the Amendment. Masse v. Pennsylvania Turnpike Comm., 163 F.Supp. 510 (E.D.Pa.1958). See American Governmental Tort Liability, 20 Rutgers L.Rev. 710 (1966), [discussing the American history of “sovereign immunity” in this sense].
A State institution, not protected by the Eleventh Amendment and also deemed a citizen, nonetheless may be immunized from diversity suit because the doors of the State courts are closed to its adversary, and this Court, under Erie, must do likewise. If the institution is clothed with complete immunity in the State courts, it is not suable here on a diversity claim; if it is only immune to certain liabilities, that too will be mirrored by partial immunity here. Whether it is immune in this sense, of course, is a question of State law. Masse v. Turnpike Comm., supra; Gerr v. Emrick, 283 F.2d 293 (3rd Cir., 1960).
This is the relevance of Erie to the problem of sovereign immunity in Federal litigation, but it is only reached if the Eleventh Amendment is inapplicable— and Erie is not pertinent to that determination.
Even in diversity actions, whether the agency comes within the meaning of the Eleventh Amendment is a question of Federal, not State, law. State Highway Comm, in Arkansas v. Kansas City Bridge Co., 81 F.2d 689 (8th Cir., 1936); NA-JA Const. Corp. v. Roberts, 259 F. Supp. 895 (D.Del., 1966); DeLong Corp. v. Oregon State Highway Comm., 233 F.Supp. 7 (D.Or.1964) aff’d 343 F.2d 911 (9th Cir., 1965), cert. den. 382 U.S. 877, 86 S.Ct. 161, 15 L.Ed.2d 119; State Highway Comm., supra; Zeidner v. Wulforst, 197 F.Supp. 23 (S.D.N.Y., 1961); Masse v. Pennsylvania Turnpike Comm., supra.4
4
“In making this determination, the federal courts will be influenced by state decisions, dealing with the character and status of state agencies, but ultimately the question is one which federal courts must answer.” DeLong, supra, 233 F.Supp. *572at 10. Both the Eleventh Amendment and a State’s immunity in its own courts stem from the same common law roots in the ancient dogma that “the King can do no wrong.” But each State may modify the scope of that privilege as it wishes, and such variation cannot form the basis for a Federal standard of constitutional jurisdiction. See Arkansas Highway Comm. v. Kansas City Bridge Co., supra, 81 F.2d at 689, 691. Although State courts sometimes refer to the Amendment they have no occasion to interpret it precisely. Therefore, I read the language defendant relies on in Harrison Const. Co. v. Ohio Turnpike Comm., 272 F.2d 337, 339 (6th Cir., 1959), to the effect that State decisions would be persuasive if not conclusive, as a reference to the obvious authority of such decisions on the type of agency created [interpreting the enabling statute; declaring the agency’s factual relationship to the State in its operations; and analyzing the status of similar agencies in that State]. But to acknowledge that these are primarily State questions, is not to end the inquiry; this Court must then weigh its finding, based on State decisions, against the Federal case law on the Eleventh Amendment. See Harrison Const., supra at 340-342.