f>7S KUIIIA XXIf. 



Subfamily ATOMARIINAE. 



The members of this subfamily are most readily distinguished 

 by the position of the antenna 1 , these organs bcin^ inserted upon 

 the front a.nd having their bases close lordlier. The body is 

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

 ;irc known to be represented or probably oeenr in the State: 



KEY TO INDIANA GENERA OF ATOMARIIN.E. 



a. I'rosternal spine free, the tip passing over the edge of the flat or feebly 

 concave surface of the mesosternum ; antenna? free, the grooves be- 

 fore the eyes wholly obsolete, club loosely three-jointed; scntellmn of 

 moderate size. 



/>. Spine of prostcrinini prolonged and acute at tip: side margin of tho- 

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



XI. C.ENOSCELIS. 



bl. Spine of prosternuni shorter and truncate at tip ; thorax with a sin- 

 gle lateral edge; bind tarsi 5-jointed in both sexes; form variable. 

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

 (L Body elongate and parallel ; thorax angulate and foveate close 

 lo the edge far behind the middle; antenna? very close at base, 

 the basal joint obeonical. AGATHENCIS. 



d(L F>ody oval, more convex; thorax rounded or angulate at or be- 

 fore the middle; antenna 1 less dose 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. 



mi. I'rosternal spine broader and flatter, the tip broadly curved and re- 

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

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

 glabrous. XIV. EPHISTEMUS. 



XI. CJENOSOEIJS Thorn. 1870. (Gr.. "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 1 stout, with the basal joint un- 

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

 ana, while one other* may occur. 



KEY TO INDIANA SPECIES OF CJENOSCELIS. 



it. Color pale reddish-brown. 



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

 pression median and feeble; body narrow and rather elongate. 



1101. FERRUGINEA. 



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

 form. TESTA CE A. 



nn. Color piceous-hrown lo black; thorax broadly impressed at base. 



