NORTH AMERICAN COLEOPTERA. 
303 
position is always distinct, but the two in front may escape observa- 
tion. 
Of the habits of this insect nothing is certainly known. Care 
must be taken not to confound small specimens of this with ohlongo- 
guttatm (mterruptus) or fallax, but neither of the.se has the pygidial 
spine. 
It is quite clear that this is the species Say had before him from 
his remarks in the original description, and a subsequent note (vide 
edit. Lee. ii, pp. 104 and 596). LeConte, in his “ Revision,” p. 245, 
admits both granulatus and quadriguttatus, but it is very clear that 
he has used the female as his type of the former and a male for the 
latter. 
Hub. — New England States westward to IMissouri. 
iievadeiisis n. sp. — Form elongate, elytra very acute at ape.v, piceous. 
subopaejue, with feeble violaceous lustre beneath. Antennse nearly attaining the 
hind angles of the thorax, with bronze lustre, serrate from the fourth joint; 
front feebly convex, a moderately impresed line extending from the occiput to 
middle of front, surface closely punctate, a vague fovea each side of middle. 
Thorax uearly a half wider than long, sides arcuate with a slight sinuation near 
the hiud angles, these with a strong arcuate carina, disc convex, with a broad, 
but vague median impression consisting of an anterior and posterior division, 
lateral depression shallow, surface comparatively smooth each side of middle, 
some vague strigse posteriorly and punctate near apex, at sides densely punctate; 
scutellum not transversely carinate ; elytra scarcely sinuate behind the humeri, 
without post-median dilatation, the sides of the abdomen exposed, apices sepa- 
rately acute and somewhat prolonged, serrulate, disc slightly flattened at middle, 
a vague costa on each side and three depressions, which are slightly pubescent; 
basal, median and one-third from apex, surface vaguely not closely imbricate, 
less closely than in cavatus ; prosternum closely punctate, the lobe distinctly 
emarginate, intercoxal process gradually narrowed, acute at tip, propleurse closely 
punctate, scabrous, sparsely pubescent; metasternum at middle comparatively 
smooth, at sides closely punctate and slightly strigose. Abdomen nearly smooth 
at middle, very sparsely punctate at sides, even on the first two segments, very 
sparsely pubescent, the vertical portion of segments sparsely pubescent ; pygidium 
coarsely punctate, with a median carina, which projects rather strongly at apex. 
Length .40 inch. ; 10 mm. 
Male. — U nkno wn . 
Female. — Tiltite not mucronate, claws similar on all the feet, cleft 
posteriorly to the tip, the lower portion forming an acute tooth. 
This species is totally unlike any other in our fauna from the acute 
and somewhat prolonged elytra. Its general form is not very unlike 
macer. It will be known, however, among the species with projecting 
carina by its feeble sculpture, the presence of the three pubescent 
