ee Oued JB: 
SOME PSOCINA OF 
THE UNITED STATES. 
BY HERMANN AUGUST HAGEN, CAMBRIDGE, MASS. 
(Continued from p. 196.) 
Genus Exipsocus. 
Tue genus Elipsocus is a very natural 
one. Mr. Kolbe has separated E. uni- 
punctatus from the rest as belonging to 
a different genus Mesopsocus Kolbe. 
This species, it is true, has a peculiar 
facies, nevertheless the differences do 
not appear to justify a generic separation, 
the more as a new species FL. laticeps 
Kolbe is perhaps only a variety of EZ. 
unipunctatus. Both have no hairs on 
the veins of the wings, which is an ex- 
ception in Elipsocus. The differences 
quoted by Kolbe for Mesopsocus consist 
chiefly in the venation, and represent 
differences found as variations in the 
same species. Among thirty European 
specimens now before me, twenty have the 
venation of Mesopsocus (alarum anti- 
carum ramus venae medianae interior 
ramusque venae submedianae exterior 
venula transversali conjuncti, Kolbe) ; 
the other ten specimens have both rami 
united in a point (without the venula 
transversalis) ; one of them has the 
rami confluent, as figured by Spangberg, 
and described as a character of LE. lati- 
ceps by Kolbe. The other differences of 
the venation quoted by Kolbe are even 
less important, and oceur likewise in 
E. wnipunctatus. I may state that my 
specimens are from Sweden, Eastern 
Prussia, Saxony, Posen, Hamburg, and 
Elberfeld, and that the before mentioned 
varieties were found together with the 
normal form. 
The claws of the legs of EF. unipunc- 
tatus have a tooth below, before the 
point, only visible with the compound 
microscope. The claws are 0.05 mm. 
long. the tooth 0.003 mm. The basal 
third of the claw is enlarged below, 
forming a prominent edge. I remark 
that the nearly related genus Caecilius, 
except Pterodela, has no tooth on the 
claws in living and fossil species, and is, 
as far as my observation goes, the only 
one with toothless claws. The genital 
appendages of the male of H. unipunc- 
tatus are covered by a large spoon-shaped 
valve, which is bluntly pointed above ; 
the appendages black, somewhat in- 
curved, narrow, truncated on tip; the 
external border truncated in the middle, 
therefore not reaching the tip. The 
penis appears to be long and stilletto- 
shaped. 
In the Synopsis of the Neuroptera of 
North America, p. 9, atno:3, Psocus sig- 
natus, | have stated my doubts concerning 
the distinctness of this species from Ps. 
immunis Steph. (= unipunctatus). There 
are before me five specimens from Massa- 
chusetts and New York, which, after a 
