1946] 
Habrocestum parvulum 
27 
DESCRIPTION OF HABROCESTUM PARVULUM 
(BANKS) 1 
Sarah E. Jones 
Texas State College for Women 
Discovery of a male Habrocestum parvulum (Banks) taken 
from William Trelease Woods, University of Illinois, on Sept. 
25, 1939, and two females, taken on Sept. 16, 1944, and Jan. 14, 
1945, led to examination of the specimens in the collection in 
the Museum of Comparative Zoology, Harvard University. The 
male holotype is redescribed, and the female is described for 
the first time. 
Male. Length 3.25 mm.; ceph. 1.75 mm. long, 1.25 mm. 
wide; abd. 1.5 mm. long; cephalothorax brown, ocular area 
darker with a posterior median emargination in dark area; 
lighter band across thorax behind eyes, and radiating dark lines 
on thorax; margin black; clypeus brown, darker around eyes, 
where are short white hairs; white hairs above anterior eye row 
and scattered over cephalothorax, which is high, sloping slightly 
forward and strongly backward from hind third, widest behind 
last eyes, with sides almost parallel; clypeus sloping posteriorly, 
one-half as wide as anterior median eyes; eyes, ant. row bulg- 
ing, slightly recurved by posterior margins, medians almost 
twice the diameter of laterals, second row slightly nearer hind 
row, which is narrower than thorax; quadrangle one-fourth 
wider than long, narrower behind, ^occupying less than one-half 
of cephalothorax; sternum pale, longer than wide, with coxae 
I separated by more than width of labium, coxae IV contiguous; 
labium pale, as long as wide; mandibles reddish, paler below, 
with one tooth on lower fang groove, none above; abdomen 
cream, with narrow oblique black lines laterally, leaving a pale 
line bordering abdomen anteriorly and passing back laterally 
to hind third of abdomen; on dorsum are three pairs of light 
spots, the first two confluent; posteriorly are four light cross- 
bars and a light spot above the pale spinnerets; venter pale, 
1 Published by a grant from the Museum of Comparative Zoology at Har- 
vard College. 
