Observations on certain N. A. Neuroptera, by H. Hagen, M. D., of Koenigsberg, Prussia; translated from the original French MS., and published by permission of the author, with notes and descriptions of about twenty new N. A. species of Pseudoneuroptera

1863.] 167 Observations on certain N. A. NEUROPTERA. by H. IIackn. M. T>., of Koenigsberg. Prussia; translated from the original French MS., and published by permission of the author, with notes and descriptions of about twenty new N. A. species of PSEUDONEUROPTERA. BY BENJ. D. WALSH, M. A. [X. B. In September 1802, I published in the Proceedings of the Philadel-pliia Academy of Sciences, a paper on the Pseuiloueuroptera of Illinois, (pp. .■!(il-402), describing over forty species which I supposed to be new. Shortly afterwards I forwarded duplicates of most of these species to Br. Hagen. The following Article from his pen was received by me in April, 1863: and it is most gratifying to find that his views in most cases coincide with mine. The new species now described by me, were all found within four miles of Rock Island. Illinois, with the exception of Hetcerina texana received from Texas through Mr. Uhler. None of my specimens are alcoholic — B. T>. W.] PSOCINA.— Psocus. tt Tarsi 2-articulate. Discoidal cdluh closed, quadrangular. Ps. PURUS Walsh. New to me. One 9 • Ps. SEMISTRIATUS Walsh. One % , three 9 . Allied to Ps. quietus Hagen. Is it diiFerent ? Ps. quietus is described from a 9 in bad condition, from the State of New York (Coll. Winthem), and another % from Georgia. The latter seems to me identical with semistriatus, the former is possibly different — the wings are partly deficient, the pterostigma entirely. The specimen from New York has the " black spots on the nasns." The description of Ps. quietus must apparently be revised, or possibly entirely erased. [_See note 1.] Ps. PERPLEX us Walsh. A specimen, apparently identical, was re-ceived by me from Mr. Walsh, in 1860. Ps. LiCHENATiJS Uhler (anctore ipso). New to me % 9 . A cabi-net name of Mr. Uhler's. [aSVc note 2.] tj Tarsi 2-articulate. Discoidal cellule open, alsent. Ps. GEOLOGUS Walsh. Very like Ps. salicis Fitch^ of which I pos-sess only a single specimen, possibly a little immature. The neuration is exactly similar. Ps. yeologns is deeper colored, of a brown approach-ing to blackish ; the antennae are a little more robust and the wings a little longer. It remains to prove whether Ps. salicis is an immature 9 and Ps. geoloyus a S of one and the same species. It is a difficult