Ill I'. ( \ ii'nioN m-;i:ri.r> 



2S!I 



tiite. Elytr.-i iiroatlly (>v;il, roiil inuiiiu (lif ciiixc >>\' llic llituax: siul'aue 

 iri-egularly puiu-tate. suiuetiiues with lariu'er puuelures J'oi-iuiiif,' siiiut-us rows 

 near the sides ami suture, lliiul leiuora of male witli a hroad, aeute tooth 

 at apex. Leugth l.G 2 mm. 



Starke County: ran. .Itiiie 17. liarger and darkei- than egena, 

 with the legs less thickened and the tarsi more sU'iider. 

 m-2 (1792). Cyrtlsa egena Lee., Proe. riiii. .\(a<l. Nat. Sci.. 1S5:'., 284. 



( )val or subglobose, vei-y convex. Pale brownish-yellow, shining. Thorax 

 nuire Ihan twiee as wide as long, narrowed in front; surface sparsely and 

 very linely punctate. Klytra eacli with eight sumewliat ii'regnlar i-ows of 

 very line jiunctures; intervals Hat, smootli, or rarely with a few line punc- 

 tures. Tarsi very short and much compressed. Length 1-1..'') mm. (Fig. 

 143, cv» 



]\rarsha.ll, Monroe and Terry counties; scarce. May IG-Juue 10. 



IsopJostns fossor Horn, hemispherical or broadly oval, very eon- 

 vex, reddish-yellow in hue, length 1.5-2 mm., was described from 

 Detroit. ^lichigan. and the District of Columbia. 



XIII. Agathidii^m Illig. 1798. (Gr., '' good ^ little one.") 



Very small black or piceous shining beetles having the labrum 

 short, rounded in froiit ; antenna^ with joints 4-8 small, gradually- 

 broader. 9-11 forming an 

 oblong rather loose club. 

 They occur beneath bark 

 or in fungi and are more 

 or less contractile, some of 

 them having the power to 

 roll themselves into a very 

 convex rounded mass, with 



.p=>=««<3CD 



Fig. 144. a, Agathidium oniscoides; b, upper, same, contracted; 

 J, , , , , ■, [\ov;ei, A. politum {ma.\e) contracted; c, Aglyptus lavis; a, antenna 



the legs bent under and Kof same. 



completely hidden. Three species have been taken in Indiana, while 



another ])i'()bably occurs. 



KEY TO INDIANA SPECIES OK AGATHIUIXJM. 



a. IMesosternum continuous ()n the same plane with the metasternum, mod- 

 erately separating the middle cox:e and subcarinate in front; elytra 

 polished, without punctures; third joint of anteunai longer than sec- 

 ond, 

 ft. Larger species; sutural strife very tine. 503. oniscoides. 



hb. Smaller species; sutural stri:e distinctly impressed. 



564. EXIGULM. 



aa. Mesosternum vertical between the coxie, which it narrowly separates, 

 not carinate in front; hind angles of thorax broadly rounded; body 

 very convex and contractile. 



