NORTH AMERICAN COLEOPTERA. 
31 
In a sentence immediately preceding he writes: “Its head is the 
head of a Corymbitite, but the coxte !” Here is the point at issue. 
The form of the posterior coxal plates, whether abruptly or gradu- 
ally dilated internally seems to me a character of greater stability, 
and therefore more reliable as a character than the form of the head. 
Therefore, I must at this time differ from that learned entomologist, 
and place it among the Cryptohypnites. 
In the latter group we find species with the frontal margin scarcely 
distinct from the clypeal and the labial palpi exhibiting a tendency 
to elongate, especially in the last joint. 
From Cryptohypnus the genus may be said to differ by the form 
of the long maxillary palpi terminated by a cultriform joint. 
Science owes to Mr. T. D. A. Cockerell the discovery of the spe- 
cies on which the genus is founded, and both the generic and specific 
names are due to his suggestion. Had it not been for the necessity 
of quoting the letter of Dr. Candeze in order to explain why I dif- 
fered from him, I would have preferred to have elaborated the notes 
sent me by Mr. Cockerell to publish them under his name. 
A. liieiiialis n. sp. — Oblong, parallel, moderately convex, piceous, slightly 
shining, sparsely pubescent; antenme a little longer than the head and thorax, 
piceous, feebly serrate, joints all longer than wide ; head sparsely punctate, front 
rather flat, the frontal ridge not continuous across the front; thorax longer than 
wide, apex feebly emarginate, widest one-third from apex, sides moderately 
arcuate, slightly convergent posteriorly, feebly sinuate before the hind angles, 
which are acute, not long nor divergent, distinctly carinate, disc moderately 
convex, median line feebly impressed posteriorly, without basal incisures, sur- 
face equally punctate, moderately coarsely, but not closely; elytra not wider 
than the thorax in front, oblong oval, humeri very oblique, disc striate, strije 
punctured, intervals flat, irregularly biseriately punctate and somewhat wrinkled, 
especially at base ; prosternal lobe not prominent, irregularly arcuate in front, 
the edge not beaded, surface coarsely not closely punctate, apical mucro very 
oblique, propleurse less coarsely and less closely punctate; metasternum and 
abdomen still less closely punctate and more shining, the last segment more 
coarsely and closely ; legs piceous, tarsi usually paler. Length 6.5 mm. ; .26 inch 
PI. 1, figs. 6, 7. 
Collected by Mr. T. D. A. Cockerell at West Cliffe, Custer County, 
Colorado, at an elevation of 7000 feet and over. 
