578 



FAMILY XXII. CRYPTOPHAGlDiE. 



Subfamily ATOMARIINAE. 



The members of this subfamily are most readily distinguished 

 by the position of the antenna*, these organs being inserted upon 

 the front and haying their bases close together. The body is 

 smaller, as a rule, than in the Crytophagime. The following genera 

 are known to be represented or probably occur in the State : 



KEY TO INDIANA GENERA OF ATOMARIINAE. 



a. Prosternal spine free, the tip passing over the edge of the flat or feebly 

 concave surface of the mesosternuin ; antennae free, the grooves be- 

 fore the eyes wholly obsolete, clnb loosely three-jointed; scutellum of 

 moderate size. 



&. Spine of prosternum prolonged and acute at tip; side margin of tho- 

 rax double : hind tarsi of male 4-joiiited ; form elongate, pubescent. 



XI. CLenoscelis. 



bb. Spine of prosternum shorter and truncate at tip; thorax with a sin- 

 gle lateral edge ; hind tarsi 5-jointed in both sexes ; form variable, 

 c. Elytra not margined at base ; body always distinctly pubescent. 

 d. Body elongate and parallel ; thorax angulate and foveate close 

 to the edge far behind the middle ; antennas very close at base, 

 the basal joint obconical. Agathenois. 

 dd. Body oval, more convex ; thorax rounded or angulate at or be- 

 fore the middle; antenna; less close at base, the basal joint 

 shorter and oblong. XII. Atomaria. 



cc. Elytra with a beaded margin at base; body minute and nearly 

 glabrous. XIII. Tisactia. 



a a. Prosternal spine broader and flatter, the tip broadly curved and re- 

 ceived closely within a depression at the apex of mesosternum ; scu- 

 tellum cordate, very minute; body broadly oval, convex and almost 

 glabrous. XIV. Ephistemus. 



XI. C^enoscelis Thorn. 1870. (Gt\. "common + tibia.") 



Rather elongate, strongly punctured and pubescent beetles, pos- 

 sessing the characters mentioned in key and having the thorax 

 broadly impressed at base ; antenna? stout, with the basal joint un- 

 usually large and obconic. Three species have been taken in Indi- 

 ana, while one other may occur. 



KEY TO INDIANA SPECIES OF CENOSCELIS. 



a. Color pale reddish-brown. 



b. Thorax one-third wider than long, strongly curved at sides, basal im- 

 pression median and feeble; body narrow and rather elongate. 



1101. FERRUGINEA. 



bb. Thorax two-thirds wider than long; body stouter and more oval in 

 form. TESTACEA. 



aa. Color piceous-brown to black; thorax broadly impressed at base. 



