288 
GEO. H. HORN, M. D. 
Male. — Front flatter, more densely, but more finely pnncfate, 
nsually greenish in color; prosternnm densely punctate along the 
middle with (piite fine, sub-erect, silken pul)escence ; metasternum 
convex ; ventral segments similar in the sexes, not impressed. 
Female. — Front more coarsely punctate, color more or less cupre- 
ous; prosternum rather coarsely, not closely punctate, not pubescent. 
Variations. — The only variations noted are those of size and color, 
which do not change the aspect of the species in any great degree. 
Of the habits of this species nothing has been recorded. This is 
one of the larger species in our fauna, although several exceed it in 
size. 
The claws are cleft, and with the lower portion incurved, as re- 
(piired in the group, although less incurved than usual, so that the 
])oints are (piite distant. This divergence from the tyjie of the group 
is the more marked in the male, the claws of the other sex being 
nearly contiguous. 
Hab. — Occurs in the Mississippi Valley from IMissouri to Texas. 
A. 11 . sp. — Form robust, obscure seneous, opaque. Autenuae short, 
serrate from the fourth joint, slightly cupreous; head densely coarsely punctate, 
slightly strigose on the occiput, lougitudiiially impressed from the occiput to the 
clypeus. Thorax broader tlian long, slightly narrowed in front, sides straight, 
arcuate near the front, lateral line not sinuous, base slightly broader than the 
humeri, a moderately deep impression behind the front angles, which is entirely 
lateral, median line rather broadly and deeply concave, hind angles not carinate 
% , obsoletely carinate 9 ; surface coarsely, closely and irregularly strigose, the 
intervals between the ridges punctate; elytra broadest at base, scarcely dilated 
behind the middle, apices separately rounded, .scarcely serrulate, basal depres- 
sions almost obliterated, disc rather flat, vaguely concave along the middle of 
each side ; surface densely granulate, strigose ; body beneath similar in color, but 
very obtuse, intercoxal process rather broad, parallel and very obtuse at apex, 
propleiiraj coarsely punctate, slightly strigose; abdomen finely punctate at mid- 
dle, more densely and roughly at the sides, the lateral marginal line entirely 
obliterated on the first two segments; x)ygidium jninctate, indistinctly carinate; 
claws similar on all the feet. Length .36 inch. ; 9 mm. 
Male. — Prosternnm densely punctate and rugulose sparsely, finely 
pubescent. Ventral segments not impressed. 
Female. — Unknown. 
The two specimens before me show no variation. 
The entire obliteration of the marginal line on the first two ventral 
segments is a character not observed elsewhere in our species. 
In form and general appearance this species resembles obolinns, 
which is also remarkable in having the marginal line of the abdomen 
faintly indicated on the first segment. 
llab. — Texas, ])robably near the lower Rio Grande. 
