a a ee 
HEMIPTERA. 183 
bilobed posteriorly; anterior legs not half the size of the others, claws weak; pos- 
terior legs largest. These and second ones provided with strong clasping claws, or 
terminal joint of tarsus, opposing basal joint 
of tarsus, which is provided with corrugated 
, 2 plate; tibia at apex internally provided with 
a short toothed spine. 
Abdomen of eight segments, elongate, each 
M segment sparsely set with short, very stiff : 
7 hairs, those at lateralangles spine-like; penis —& 2 
| . distinct, of ordinary form. (See fig. 105.) Z fe 
4 Egg elongate ovate, attenuated toward the Hf 
attachment, the surface with faint reticula- =: 
.. tions having form of scales; the basal half of ES 
4 the egg has the walls beautifully corrugated. 
(See fig. 105, f.) 
Length, 1.20; head, 0.27; thorax, 0.27; ab- 
‘domen, 0.73; antenne, 0.16mm. Width, 0.33; 
head, 0.26; thorax, 0.30; abdomen, 0.33 mm. 
Posterior femur, length, 0.10. Posterior 
tibia, length, 0.10. Egg: Length, 0.80; width, 
0.18 mm. Fie. 105.— Hematopinus sciuropteri: a, 
: ¢ i male, dorsal view; b, head, ventral view; 
This species, in the form of the head _g, sternal plate; d, leg; e, terminal seg. 
and the character of the antenne, dif- ments; f, egg—all enlarged (author's 
fers very decidedly from most of the a paaat 
other members of the genus and is readily distinguished by these char- 
acters, as also by the form of the sternal plate. 
| One specimen male and one egg taken 
from different specimens of the flying 
squirrel, Sciuropterus volucella, but un- 
doubtedly belonging to the same species. 
Collected at Ames, Iowa; also repre- 
sented in the Burnett collection of the 
Boston Society of Natural History from 
the same host. 
LOUSE OF THE Fox SQUIRREL. 
(Hamatopinus antennatus Osb.) 
Body long and slender, the abdomen propor- 
tionately large. 
Female.—Head narrow and rounded in front, 
widening decidedly behind the antennie, deeply 
Fia. 106.—Hematopinus antennatus: hollowed beneath the lateral margin, the postero- 
@, dorsal view; , head, ventral jateral margin subacute, bearing a short spine- 
Beene nme; legs esternal 950. hair dind:& long stiff hair, the posterior border 
plate; f, egg—all enlarged (author's 7 - Y 
illustration). with an acute angle behind; beneath broadly 
keeled, keel behind narrow, expanding in front 
to width of head between the antenne. Antenne very different from other mem- 
bers of the genus; the first joint large with a short process on the posterior 
border bearing a sharp inwardly curved tooth; other joints ordinary, second joint 
longest. ‘Thorax short, widest behind, sternal plate ovate, broadest in front, legs 
