1863.] 
167 
Observations on certain N. A. KEUROPTERA, by H. Hagen, M. D., of 
Kcenigsberg, Prussia; translated from the original Erencb MS., and published 
by permission of the author, with notes and descriptions of about twenty new 
N. A. species of PSETJDONEUROPTEEA. 
BY BENJ. D. WALSH, M. A. 
[H. B. In September 1862, I published in the Proceedings of the Philadel¬ 
phia Academy of Sciences, a paper on the Pseudoneuroptera of Illinois, (pp. 
361-402), describing over forty species which I supposed to be new. Shortly 
afterwards I forwarded duplicates of most of these species to Dr. Hagen. The 
following Article from his pen was received by me in April, 18685 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. Hone of my specimens are alcoholic—B. D. W.] 
PSOCINA.—Psocus. 
Tarsi 2i-art( dilate. Discoidal cellule closed^ quadrangular. 
Ps. PURUS Walsh. New to me. One 9 . 
Ps. SEMISTRIATUS Walsh. One % , three 9 . Allied to Ps. quietus 
Hagen. Is it different? 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 nasus.^^ The description of Ps. quietus must apparently 
be revised, or possibly entirely erased. \_See note 1.] 
Ps. PERPLEXUS Walsh. A specimen, apparently identical, was re¬ 
ceived by me from Mr. Walsh, in 1860. 
Ps. LiCHENATUS Uhler (auctore ipso). New to me S 9 . A cabi¬ 
net name of Mr. Uhler’s. \_See note 2.] 
Tarsi 2-articulate. Discoidal cellule open, absent. 
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. geologus is deeper colored, of a brown approach¬ 
ing to blackish j 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. geologus a 'S of one and the same species. It is a difficult 
