( 40 ) 
Remarkable for the number of punctures in the thoracic 
series. 
LATHROBIUM, Gray. 
1. L. simili'penne, Black; members rufous or yellow- 
ish. 
Inhab. Mexico. 
black, polished, hairy, densely punctured: antennce 
reddish brown, 1st and second joints rufous : labrum and 
palpi piceous: thorax longer than broad, with a longitudi- 
nal glabroiis line in the middle, and a glabrous basal mar- 
gin : elytra, terminal edge piceous : tergum with more mi- 
nute punctures ; more hairy at tip : honey-yellow; thighs 
pale yellow. 
Length two-fifths of an inch. 
Like most of the species of this genus the middle of the 
thorax is destitute of punctures ; in this character it also a- 
grees with Staphylinus violaoeus, Gray. 
2. L. armatum, Anterior thighs dilated and angulated 
beneath. 
Inhab. Indiana. 
jSoiZy black; punctured: piceous ; 1st joint ob- 
conic, not longer than the Snd and 3d together, which are e- 
qual; 4-10 joints moniliform ; last joint ovate-acute: palpi 
pale piceous ; terminal joint minute, that of the labials long- 
er : thorax oblong-quadrate ; angles rounded ; glabrous line 
none: elytra black- piceous, punctures not deeply impressed ; 
sutural stria distinct: feet rufous; thighs robust, particular- 
ly the anteriors, which have a prominent angle beneath near 
the tip: tibim a little dilated and compressed, obliquely 
truncate at tip ; anterior pair with an obtuse sinus on the in- 
ner side : tarsi, 1st joint not longer than the second; penul- 
timate joint a little lobed beneath. 
Length about seven-twentieths of an inch. 
I have obtained but one specimen, which is a male. The 
above description will show that it differs much from any 
known species. 
3. L. cinctum. Black, punctured; antennae and mouth 
piceous; feet yellowish ; posterior margins of the segmeat^: 
of the abdomen rufous. 
Inhab. Missouri. 
