120 Journal New York Entomological Society. [Voi. iv. 



finely and not densely punctured ; there is an impressed line on the 

 front extending in a parabolic course from the base of one mandible 

 well up on to the vertex, thence curving around and running down to 

 the other mandible. Bristles few but long. Antennae four-jointed, first 

 joint much broader and somewhat longer than the second, which is in 

 turn slightly broader but much shorter than the third ; fourth joint very 

 smaii, tipped with one long and two short bristles. Ocelli are situated on 

 the'sides of the head behind the bases of the antennae. Labrum transverse, 

 sides rounded, anterior margin truncate and slightly sinuate, angles 

 broadly rounded. There are three long bristles on each side and a se- 

 ries of about fourteen shorter ones around the margin. Mandibles very 

 heavy and strongly toothed ; a side view is figured; other aspects show 

 that the tip is emarginate or bidentate. INIaxilla^ armed on the inner 

 face with a regular series of strong spines; there are also a few smaller 

 scattered spines on the surface. Palpi three-jointed, first and second 

 joints about equal in length, the latter narrower, third joint smaller and 

 shorter. The second joint bears two very long bristles, the others are 

 smooth. Mentum subcordiform in outline, ligula very small, tipped 

 with two short spines, palpigers broad, palpi heavy, the first joint much 

 smaller than the second. 



Prothorax about twice as long (on dorsal surface) as the mesothorax, 

 the anterior side margin oblique, so that the segment is shorter on the 

 ventral surface than on the dorsal. The scute is slightly roughened, 

 but shining, the whole anterior margin marked with very fine longitu- 

 dinal rugosities. The mesothorax is short, the metathorax about one- 

 half longer, surface sculptured like that of the prothorax except that 

 there are none of the fine longitudinal rugosities. Abdomen ot nine 

 segments, the first eight of which are almost alike, very convex above, 

 ventral surface with a deep longitudinal impression each side Ninth 

 segment obliquely truncate and deeply excavated on upper surface, the 

 excavation coarsely rugose, ventral surface with numerous bristles. From 

 the region of the suture between this segment and the eighth protrudes 

 on the ventral aspect a small brown semicircular plate, tipped by two 

 papillae. Spiracles in nine pairs, the largest being situated on the under 

 surface of the mesothorax in front of the coxae, while the remainder are 

 found on the abdomen near the anterior margin of the sides of segments 

 one to eight. Legs moderate, not differing much in length among 

 themselves, the anterior pair a trifle stouter, coxae very prominent, 

 claw sharp, curved in lateral aspect (it is twisted out of place in the 

 camera-lucida drawing) and armed beneath with two spines or bristles. 



