1946] Habrocestum parvulum 29 
wide, and longer dorsally than ventrally; apophysis short, 
hooked inward; embolus almost straight; bulb projecting ven- 
trally and extending well over tibia. 
Female. Length 3.5 mm.; ceph. 2.0 mm. long, 1.5 mm. wide; 
abd. 1.75 mm. long; cephalothorax colored as in male, but eye 
area black, transverse line behind eyes more distinct, and no 
radiating lines on thorax; hairs as in male, with also dark hairs 
above anterior eye row, longest between anterior eyes and be- 
low middle eye row; eyes , sternum , labium , and mandibles as 
in male; abdomen pale, mottled with black forming thin longi- 
tudinal lateral lines, dorsum with a large pair of light spots on 
anterior edge, two smaller pairs at mid-length, and four light 
cross-bars posteriorly; venter as in male; legs brown, 4-3-1-2, 
spines as in male; palp brown, outer two joints slightly swollen, 
with long stiff hairs ventrally and medially; epigynum with large 
median droplet-shaped spermathecse and smaller lateral vulval 
openings. 
Holotype, Ithaca, N. Y. (N. Banks Collection). Allotype, 
Ithaca, N. Y., May 21, 1911. Coy Glen (N. Banks Collection). 
Taken with the allotype were one male and three immature 
specimens. 
In the male from Illinois the cephalothoracic colors are more 
sharply contrasted than in the types. The male tibial apophysis 
is less blunt than in H. pulex (Hentz) ; the bulb protrudes as 
much posteriorly as in pulex , and much farther ventrally; and 
the embolus is less whorled than in pulex. The epigynum is dis- 
tinctive in having the spermathecse medial to the vulval open- 
ings. 
