46 THOMPSON YATES AND JOHNSTON LABORATORIES REPORT 
The ventral genal process is slightly curved backwards. The occiput is in the dorsal 
line two-thirds the length of the frons. Its hinder edge is somewhat convex in the 
middle. There is only one long bristle on the occiput standing near the hinder edge 
above the antennal groove. The mandibles reach nearly to the middle of the four 
femur. They are rather slender, being only a little wider near the base than the 
maxillary palpi. The latter reach almost to the apex of the anterior coxa, the last 
segment being as long as the distance from the eye to the ventral frontal corner of 
the head. The proportional lengths of the segments are 18, 19, 14, 27, the propor- 
tions varying a little. The club of the antenna is globular in the being somewhat 
conical in the 
Thorax. — -The pronotum bears one long stout bristle ventrally close to the pleural 
plate, and a vertical row of six thin hairs in the $ and four or five in the %. The 
pleural plate of the prothorax is ventrally as long as the distance between the eye and 
the ventral frontal corner of the head. The mesonotum has only one long bristle 
near the ventral edge and a few small hairs in the dorsal half. There is one long 
bristle on the mesothoracical sternite. The metanotum and metasternum do not bear 
bristles. The epimerum of the metathorax has a row of four bristles, which are 
nearly equidistant from one another, the upper two being closer together than the 
second and third. 
Abdomen. — The tergites one to six bear dorsally on each side a long but very 
slender bristle, there being an additional bristle in front of it on the first tergite. The 
seventh tergite has a rather long and stout bristle near the apex, standing on a short 
cone. In front of this bristle there are two thin hairs on each side. The sternites of 
segments two to six bear no bristles. On the seventh sternite there is one bristle, 
besides some very small hairs. The stigmata have about the same diameter as the 
groove of insertion of the subapical bristle of the seventh tergite. 
Legs. — The hind coxa bears on the inner side a patch of from eighteen to twenty- 
four spine-like bristles. There is one bristle posteriorly near the apex of the hind 
coxa (PI. I, Figs. 7, 8). The hind femur bears a lateral row of from six to nine 
bristles. The dorsal bristles of the tibiae are rather stout. The mid and hind tibiae 
bear six dorsal incisions, the apical one included. The longest bristle of the fifth 
dorsal pair of bristles of the hind tibia is less than twice as long as the tibia is broad 
at the apex, the longest apical dorsal bristle not reaching to the apex of the first hind 
tarsal segment. The second mid tarsal segment is half as long again as the first. 
The first hind tarsal segment is more than half the length of the hind tibia, and bears 
in the $ two or three and in the £ three or four bristles on each side, besides the 
apical ones. 
The fifth segment (PI. Ill, Fig. 24) of all tarsi has five heavy bristles on each 
side, besides a subapical hair. The claw is stout, being curved in the middle, and 
bearing a prominent basal projection. The measurements of the mid and hind tarsi 
are as follows : — 
