April, 1919 Bulletin of the Brooklyn Entomological Society. 61 
On the first tergite there is one bristle on each side represent- 
ing a third row. Sternites III-VII bear bristles as follows: 3, 6, 
7,6, 10. The antepygidial bristles are three on a side, the middle 
bristle very large and strong, while the laterals are so weakly 
developed as to be hardly visible. 
Legs.—On the inside of the hind coxe there are a few hairs, 
similar to those in C. arctomys Baker. The fore coxa bears 
numerous bristles on its outer surface. On the mid and hind 
coxe the bristles are confined to the distal anterior portion of the 
outer face. The bristles on the exterior edge of the tibiz, es- 
pecially in the case of tibia III, are fewer than usual and none 
of the apical bristles of tibia III reach the apex of the first tarsal 
segment. Two apical bristles of tibia IT reach the apex of the 
first tarsal segment of that leg. There is one apical bristle on 
the third segment of: Tarsus III which reaches the apex of the 
fourth segment. The first segment of tarsus I bears three large 
bristles on the outer edge. The comparative measurements of 
the tarsal segments are as follows: 
Tarsus. Segments I-5. 
RS ane 25 20 12 2G) 
II 35 35 25 15 4o 
Ill 85 65 38 22 45 
Plantar bristles five pairs, all lateral. 
Modified Segments The eighth tergite has four heavy mar- 
ginal bristles, and five lateral. The sclerite is sharply emarginate 
posteriorly. The eighth sternite is prolonged posteriorly and has 
near the tip a group of five large bristles. There are numerous 
smaller bristles near the lower margin. The fixed process of the 
clasper is enlarged near the middle and is then contracted to a 
blunt apex. The movable process is oblong, rounded at apex, 
nearly twice as long as the fixed process and bears at the posterior 
apical angle five thin bristles. At the juncture of the two proc- 
esses there are the two bristles so often found in this genus. The 
ninth sternite bears many small hairs. Female essentially sim- 
ilar to the male. The lateral antepygidial bristles are more fully 
developed in this sex but are less than one-fourth as long as the 
mid-bristles. 
