228 Trans. Acad. Sci. of St. Louis. 
Form moderately convex, the hind body very broad, brownish-rufous 
throughout, the legs and antennae concolorus, the head and abdomen 
blackish; surface of the head above and beneath and of the pronotum 
impunctate but densely and very strongly micro-reticulate, the stiff 
short setae moderately close-set, of the elytra and abdomen rather 
more shining, the former less strongly reticulate, somewhat rugulose 
but not distinctly punctate, the setae very thick and moderately close- 
set, the latter rather densely clothed with very fine short and decum- 
bent hairs of the usual type; head rather longer than wide, the base 
feebly lobed in the middle, the eyes small, not prominent, at fully three 
times their length from the base measured longitudinally; antennae 
short, moderately thick, about as long as the head, feebly incrassate, 
the joints rather closely united; prothorax slightly longer than wide, 
three-fourths as wide as the head, strongly rounded laterally at apical 
third, the sides thence moderately converging and nearly straight to 
the base and more strongly converging to the apex, the latter about half 
as wide as the base; surface with a narrow and less opaque median 
line; elytra one-fifth wider than long, nearly one-half wider than the 
head, three-fourths to four-fifths wider than the prothorax and fully a 
third longer, the sides feebly diverging from the base and broadly, feebly 
arcuate; abdomen short and broad, less than one-half longer than the 
elytra, at base fully as wide as the latter, and, at the middle, a little 
wider. Male with the fifth ventral unmodified, the sixth with a very 
large simple parabolic sinus, about half as wide as the segment and 
between two and three times as wide as deep. Length 5.0 mm.; width 
1.45 mm. Massachusetts (Dracut),— Mr. Blanchard..formicarius Csy. 
Although the body has a very stout form, nearly as in 
Pachystilicus, it probably has little or no phylogenetic rela- 
tionship with that genus, as the head, labrum, palpi, sculpture 
and vestiture are of wholly different types. There is but little 
difference between the male and female, the former having 
the head and prothorax very slightly narrower when compared 
with the hind body. 
Stilicolina n. gen. 
In the peculiar opaque surface and very fine subgranuliform 
punctuation, this genus resembles Omostilicus and the remark- 
ably fine and obsolete sculpture of Husétilicus, mentioned by 
Sharp, is probably similar. This type of sculpture is wholly 
dissimilar from that prevailing in Stilicus. In the very sharply 
elevated and entire prosternal carina and structure of the 
labrum, Stilicolina is wholly different from Omostilicus. We 
