738 FAMILY XXXVII. ELATERID.E. 





 KEY TO INDIANA GENERA OF COBYMBITINI. 



</. Front or clypeus convex, its edge higher than the labruni ; mouth in- 

 ferior and applied to the prosternum in repose. 

 6. Front truncate, not margined behind the labrnm, though higher than 



it; tarsal claws simple; size 7 or more mm. 

 c. Side margins of thorax bent downward in front. 



XXX. AGIUOTES. 



r<\ Side margins of thorax straight. XXXI. DOLOPIUS. 



bl). Front margined behind the labrum ; tarsi slightly lobed. the claws 

 with comb-like teeth; size small, not more than G mm. 



XXXII. GLYPHONYX. 



an. Front flattened; mouth horizontal or anterior (except in Serious). 

 (1. Front margined. 



c. Tarsal claws with comb-like teeth ; color usually dull reddish- 

 brown or piceous. XXXIII. MELANOTIS. 

 cc. Tarsal claws simple. 



/'. Hind tarsi with first joint scarcely longer than second; color 

 dull sooty brown. XXXIV. LIMONIVS. 



//". Hind tarsi with first joint elongate. 

 {/. Prosternal lobe very short. 



//. Antenna? 11-jointed : metasteruum acute. CAMPYLUS. 



////. Antenna? 12-jointed ; inetasternum obtuse. PITYOP.ITS. 



gg. I'rosternal lobe long. 



i. Sutures of prosternum single; thorax usually distinctly 



longer than wide. XXXV. ATHOUS. 



//. Sutures of prosternum double; thorax scarcely longer than 



wide, more convex. XXXVI. LEPTOSCHEMA. 



<lil. Front not margined; usually slightly concave. 



./. Sides of rnesosternal cavity not protuberant; size usually medium 



or small; color rarely uniform black. 

 7.\ Tarsi simple, filiform. 



/. Prosternum not lobed in front, the sutures straight ; third joint 

 of antenna small; length 0.5-7 mm. XXXVII. BLADUS. 



//. Prosternum lobed in front. 



m. Lobe of prosternum short, the sutures excavated in front ; 

 elytra striate ; length 11-12.5 nun. XXXVIII. NOTIIODES. 

 mm. Lobe of prosternum long. 



ii. Front convex; hind coxa! plates scarcely narrower at the 

 outer end; length G.5-7.5 mm. XXXIX. SKHTCIS. 



mi. Front more or less flattened; coxal plates distinctly nar- 

 rower at outer end. 

 n. Tarsal claws simple; color often variegated. 



XL. CORYMBITES. 



do. Tarsal claws with a broad tooth at base; piceous- 

 bronzed, elytra reddish-brown. XLI. OXYGONUS. 



/./r. Tarsi with the second and third joints lobed beneath. 



XLI I. ASAPHES. 



jj. Sides of mesosternal cavity protuberant; size large, 18 or more 

 mm., color uniform black. XLIII. MELANACTES. 



