152 JOHN L. LECONTE, M. D. 



d. Club of antennae pubescent, with the exception of an elongated space 

 extending from the base to the middle; sutures loop-shaned, parallel with 

 the smooth space Micracis. 



With the exception of Cryphalus (including Cortht/lus and Gorthi/- 

 /omimus), which is polymorphic, these genera are readily distinguished 

 by a form and sculpture peculiar to each. 



CRYPTURGTJS Er. 

 C. atomus. — Slender, cylindrical, shining black, antennae and legs brown, 

 slightly hairy on the head and at the sides of the thorax, and with rows of hairs 

 upon the elytraj prothorax longer than wide, scarcely narrowed in front, slightly 

 rounded on the sides, more rounded at the base and tip, uniformly sparsely but 

 strongly punctured ; elytra with rows of large punctures, the sutural one im- 

 pressed towards the base; intervals with scarcely perceptible rows of very 

 small punctures. Long. 1 mm. 



New York, Mr. Ulke. The smallest of our Seolytidae. The club of 

 the antenna) is tolerably large, strongly compressed, oval, obliquely 

 narrowed on the outer half, corneous, shining, and but slightly pubes- 

 cent except on the oblique edges; the funiculus consists of but two 

 small joints, the 2nd being much smaller than the first. The posterior 

 declivity of the elytra is convex, without impressions. 



APHANARTHRUM Wollaston. 



To this genus heretofore known only from the Madera and Canary 

 Islands, I would refer Hi/histes pumt'lus Mann., from Alaska. It is 

 scarcely over 1.5 mm. long, slender, cylindrical, dark brown, shining, 

 very thinly clothed with a very short pubescence, forming lines upon 

 the elytra; the prothorax is longer than wide, much narrowed in front 

 of the middle, rounded on the sides, strongly rounded at tip, very feebly 

 rounded at base, moderately convex, strongly and tolerably thickly 

 punctured ; elytra with striae of very large punctures, of which the 1st 

 and 2nd are somewhat impressed, intervals with scarcely perceptible 

 rows of very small punctures. 



This insect has nearly the form of the preceding, but under a pow- 

 erful magnifier the club of the antennae is seen to be oval, not very much 

 compressed, with the basal half corneous and shining, the outer half 

 conical, ani;ulated and pubescent; the funiculus is composed of three 

 distinct joints, the 1st being the largest, and the 3rd the broadest, ob- 

 lique and narrower at the inner side. The tarsi are very slightly dilated. 

 the 3rd joint very feebly emarginate, thus establishing a relationship 

 to the next tribe. 



The head is however short as in C/y//:);^/'^^;*.^ and somewhat proaiineut, 

 though not at all rostrated as in Hylurgini. 



