88 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
berance on the median portion, where the clypeal band is slightly sub- 
marginal (not shown in figure) and has the inner margin crenulated. 
The arrangement of the clypeal, antennal, and occipital bands is some- 
what complicated and can best be understood by consulting the figure. 
The mandibles are large but not thickened and are set but slightly for- 
ward of the middle of the head; the left mandible is toothed and the 
right sharply pointed; pharyngeal sclerite and gland large; gular 
plate small and but slightly chitinized ; eye prominent and set with an 
extremely long, strong hair (very unusual). Temples flatly rounded, 
with two large, pustulated hairs and one small; occipital margin deeply 
reentering, but occiput flatly convex. 
Prothorax one-fourth covered by head, sides strongly convex, pos- 
terior margin nearly straight, and with one long hair inside the prom- 
inent spiracle. 
Pterothorax about equal in length to prothorax, with sides slightly 
divergent and sinuate; four submarginal hairs on each side of posterior 
margin, the three inner ones pustulated. Abdomen rather slender, 
widening gradually to segment V and with tip bluntly rounded, except 
for the slightly protruding segment IX. The tergal plates are irreg- 
ularly shaped, widely separated medially, and from one another in 
segments III to VIII; paratergal plates narrow, without reentrant 
heads, and strongly chitinized. Segment I with four long dorsal 
hairs on each side of posterior margin of tergite; segment II with one 
hair at angle and four long hairs on posterior margin of tergal sclerite; 
segment III with one short and two long hairs in posterior angle and 
four dorsal hairs on tergites; segment IV with two hairs in angle and 
five on posterior margin of tergite; segment V with three hairs at 
angle, three at margin, and two on surface of tergite; segment VI with 
three hairs at angle and one on margin of tergal plate; segments VII 
and VIII with three hairs in angle; segment IX with two long and four 
short hairs on each side of posterior margin. The hairs on the ventral 
surface are shown on the right side of figure, those on dorsal surface 
at the left. 
Legs as under generic description; claws medium, somewhat blunt 
at tips. A few short bristles on femora and tibiae and a longish hair 
on second and third trochanter; all femora and tibiae more or less 
excavated on underside in posterior portion. 
Female very similar to male, except in larger size, but with the an- 
tennae of the same length; chaetotaxy quite similar, but tergal plates 
less irregularly shaped and with the two plates fused medially on 
segment VIII. 
