H. C. FALL. 131 



McCloud, Northern California (Fenyes). 



A single example of uncertain sex is all I have seen of 

 this species, which is not at all like any other of the genus 

 known to me. The general aspect is like that of Mega- 

 penthes tartaricus, though less coarsely sculptured and less 

 pubescent. 



A. iiigens n. sp. 



Black, shining, pubescence blackish, very fine and short, sparse and 

 inconspicuous. Antennae (c?) passing the hind angles of the thorax 

 by a little less than the length of the last joint ; ( 9 ) failing to reach 

 the hind angles by about two joints ; second joint one-half as long and 

 slightly more than half as wide as the third, the latter a little shorter 

 and narrower than the fourth, which is a little longer than wide ; outer 

 joints gradually narrower and more parallel, the tenth about twice as 

 long as wide. Head closely punctate, front rather strongly concave, 

 the concavity subtriangular in some specimens. Prothorax not quite 

 as long as wide, a little narrowed in front, sides broadly arcuate, hind 

 angles scarcely divergent ; punctuation dense and rather coarse later- 

 ally, finer and less close medially, a short, narrow, imperfect smooth 

 line at middle ; median line impressed posteriorly, hind angles with a 

 fine short carina. Elytra not much wider than the prothorax and 

 nearly three times as long, subparallel in the male, a little dilated 

 posteriorly in the female ; strise moderately impressed, finely punctate 

 apically, more strongly so basally ; intervals feebly convex, finely 

 sparsely punctate. Prosternum closely rather coarsely punctate, the 

 flanks fully as coarsely and more densely punctate ; metasternum and 

 abdomen more finely and sparsely punctured. Basal joint of hind 

 tarsus as long as the next three ; joints 2-3-4 with short lobes. Length, 

 16 mm. ; width, 4.7 mm. 



Five specimens have been seen, all collected by Dr. Fenyes 

 at Mohawk, California. It is probably most nearly allied to 

 scissus, but may be separated by its larger size and carinate 

 hind angles of the thorax. 



A. inn tans n. sp. 



Elongate convex, moderately shining and pubescent, head and pro- 

 thorax piceous, the hind angles of the latter pale, elytra rufotestace- 

 ous, beneath piceous, the legs, prosternal lobe, and sometimes the ab- 

 dominal apex, pale. Antennas brown or piceous, paler at base, short, 

 not or scarcely attaining the hind angles of the prothorax, joints 2-3 

 subequal in width, the latter but little longer; fourth distinctly wider 

 and about one-third longer than the third, triangular, three-fourths as 

 wide as long, the lower apical angle obtuse and rounded ; fifth similar 



TRANS. AM. ENT. SOC, XXXVI. JUNE, 1910. 



