578 FAMILY XXII. — C'RYPTOPIIAGID^. 



Sulifamily ATOMARIINAE. 



The members oJ' lliis subfamily are most reMclily distinguished 

 by the position of 1he a.nt(■nna^ these organs Ix'ing inserted upon 

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

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

 are knovm to be represented or probably oceu)- in the State : 



KEY TO INDIANA GENERA OF ATOMAKIIN.B. 



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

 concave surface of the mesosternum ; antennte free, the grooves be- 

 fore the e.ves wholly obsolete, club loosely tliree-.iointecl ; scutellum of 

 moderate size. 

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

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



XI. C^NOSCELIS. 



bl). 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; antennse very close at base, 

 the basal .ioint obconical. Agathkngis. 



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

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

 shorter and oblong. XII. Atomaria. 



c<: Elytra with a beaded margin at base; body minute and nearly 

 glabrous. XIII. Tisactia. 



nil. 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. CiENOSCELis Thoni. 1870. (Gr., "eommon + tibia.") 



Kathei' elongate, strongly punctured and pnliescent beetles, pos- 

 sessing the characters mentioned in Icey and ha\ang the thorax 

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

 nsnally lai-ge and obconie. Three species hn.ve been tal<en in Indi- 

 ana, while one other may occur. 



KEY TO INDIANA SPECIES OF C-ISNOSCELIS. 



a. Color pale reddish-brown. 



6. Thorax one-third \vider than long, strongly curved at sides, basal im- 

 pression median and feeble; body narrow and rather elongate. 



not. FERBDOINEA. 



Z)i. Thorax twd-tliirds wider than long; limly stcMiter and more oval in 



^°^^^- Tl-.STACEA. 



11(1. Cdlor piceous-briiwn to black; thorax broadly impressed at base. 



