_ .ES. 1117 



Ilaklvman, »S'. »S'. — " Cryptocephalinoram Borealis-Americoe. diag- 

 noses cum spcciebus novis Musei Lecontiani," in Joum. 

 Phil. Acad. Nat. Sd., I, 1849, 2-4!3-2G5. 



Suffrian, E. — "]\[ono^rapliio und Kritsehes Verzeichniss der 

 Xordamerikanisehen Cryptoeephali, " in Linnea Bntomlo- 

 gica VI, 1852, 198-31S; VII, 1855, 1-238; XII, 1858, 343- 

 409. 



LeConte. — "Contributions to the Coleoptera of the United 

 States," in Trans. Amer. Ent. Soc, VIII, 1880, 195-209. 



KEY TO (JENERA OF CRYPTOCEPIIALINI. 



a. Tarsal claws simple; larger, .'! or mcire mm.; surface sculpture rougher. 

 li. Thorax not margined but crenulate at base ; front femora not evi- 

 dently stouter than hind ones. 

 c. Front edge of flank of thorax, bGucatli the antemice, toothed or 

 sinuate. XIII. Bassaeexjs. 



cr. Front edge of flanks of thorax straight. XIV. Cbyptocephalus. 

 &6. Thorax margined at base, not ereuulate ; front femora distinctly 

 stouter than hind ones. 

 (I. I'ri.'stenmm flat in fn.nt. (li'],ie-scd licliind. X\'. Uribuhils. 



dd. Prosternum feebly channeled; rows of punctures of elytra usually 

 much confused. XVI. Pachybrachys. 



au. Tarsal claws appendiculate, /. e., with a square dilatation at base; 

 smaller, less than 2.."j mm. (except in Muiiiichiis) ; surface much 

 smoother, 

 c. Prosternum wider than long; form roliust, rounded; antennre stout, 

 rather short. XVII. Monachus. 



('!■. Prosternum longer than wide; form more elongate, cylindrical or 

 oval. 

 /. Antennal joints 6 to 11 wider ; toria cylindrical. 



XVIII. DiAciius. 

 //. Antennal .ioints 7 to 11 wider ; form oval, convex. 



XIX. Triachus. 



XIII. Bassareus Hald. 1849. (Gr., "a fox.") 



The members of this genus are separated from those of Crijpto- 

 cephahis, which they most closely resemble, by the character given 

 in key. The males have the prosternum armed at middle with a 

 large, erect compressed process; first ventral with a large flat plate 

 at middle, tlie hind anules of which rise into acute processes or 

 spines; fifth ventral broadly concave, witli a crest of curved erect 

 hairs each side of middle. Female with fovea of fifth ventral large, 

 deep and circular. The following species and varieties have been 

 taken or should occur in the State. 



