556 



FAMILY XIX. COLYDIID.E. 



VIII. Pycnomerus Ericlis. 1832. (Gr., "close + joint. * J ) 



In this germs the eleventh joint of the antennae is closely nnited 

 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 (3286). Pycnomerus sulcicollis Lee, N. Spec. N. Amer. Col., 1863, 69. 



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 apex or base, 

 margin slightly reflexed, surface sparsely punctate. Elytra slightly wider 

 than thorax, the strife 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- 

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

 2-jointed ; all the coxre 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 coxae very narrowly enclosed be- 

 hind ; outer apical angle of tibiae not prolonged. IX. Bothrideres. 

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

 tibiae prolonged. Erotylathris. 



IX. Bothrideres Erichs. 1832. (Gr., "a small trench + neck. '') 



One of the two known species occurs in Indiana. 



*1064 (3287). Bothrideres geminatus Say, Journ. Phil. Acad. Nat. Sci., 

 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 striae finely punc- 

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

 rower ones smooth. Length 3^1.5 mm. 



Southern half of State; frequent. February 25-November 24. 

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

 trees. 



Erotylathris exaratus 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. 



