556 FAMILY XIX. — COLYDlID.i:. 



VIII. Pv'CNOMERUs Ericlis. 1832. (Gr., "close + joint. "'') 



In this genus the eleventh joint of the antennfe is closely united 

 to the tenth, so that the club is solid and apparently one-jointed. 

 It is represented in the United States by the single species: 



1063 (328G). Pycnomebus sulctcollis Lee, N. Spec. N. Amer. Co!., 1863, 60. 

 Elongate, subconvex. Dark reddish or chestnut-brown, shining. Tho- 

 rax slightly longer than wide, base very little narrower than apex, disk 

 with two broad grooves at middle which do not reach the ajjex or base, 

 margin slightly reflexed, surface sparsely punctate. Elytra slightly wider 

 than thorax, the striaj with coarse, deep, elongate punctures. Length 5- 

 5.5 mm. 



Putnam County; scarce. June 29. 



Tribe IV. BOTHRIDERINI. 



Somewhat flattened, oblong or elongate beetles, having the an- 

 tennse short, 11-jointed, received in oblique antennal grooves, club 

 2-jointed ; all the cox;e widely separated ; first ventral segment elon- 

 gate; first joint of tarsi longer than either the second or third. 

 Both genera are probably represented in the State. 



KEY TO GENERA OF BOTHRIDERINI. 



a. Head horizontal or nearly so ; front coxte very narrowly enclosed be- 

 hind ; outer apical angle of tibia- not prolonged. IX. Bothrideres. 

 aa. Head deflexed ; front coxa- very distinctly closed ; outer apical angle of 

 tibiae prolonged. Erotylathris. 



IX. Bothrideres Erichs. 1832. (Gr., "a, small trench -f neck.") 



One of the two known species (iccurs in Indiana. 



*1064 (.32S7). Bothrideres geminatus Say, Journ. Phil. Acad. Nat. Sei., 

 V, 1826, 262 ; ibid. II, 323. 

 Oblong, subdepressed. Dark reddish or chestnut-brown, moderately 

 shining, sparsely pubescent. Thorax longer than wide, narrowed behind, 

 apex feebly emarginate ; sides slightly curved with a small tubercle on mid- 

 dle of margin; disk vaguely concave, coarsely and rather densely punc- 

 tured. Elytra slightly broader than thorax, striate, the striic finely punc- 

 tured; intervals alternately wider with a single row of punctures, the nar- 

 rower ones .smooth. Length .",^1.5 mm. 



Southern half nl' Slate; frequent. February 25-Noveniber 2-1. 

 Occurs beneath bark, usually that of living hickory, maple and other 

 trees. 



Erotylathris cxaratus Melsh., oblong, black, opaque, length 4-6.5 

 mm., is a southern form which has been taken at Cincinnati. Dury 

 finds it beneath the bark of dead elm, 



