120 
Journal New York Entomological Society. 
[Vol. 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 
small, 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. Maxillae 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 of 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. 
