738 



FAMILY XXX VII. ELATERILLE. 



KEY TO INDIANA GENERA OE COKYMBITINI. 



ft. Front or clypens convex, its edge higher than the labrmn ; mouth in- 

 ferior and applied to the prosternum in repose. 

 b. Front truncate, not margined behind the labrum. though higher than 

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

 c. Side margins of thorax bent downward in front. 



XXX. Agriotes. 



cc. Side margins of thorax straight. XXXI. Dolopius. 



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

 with comb-like teeth ; size small, not more than 6 mm. 



XXXII. Glyphoxyx. 

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

 d. Front margined. 



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

 brown or piceous. XXXIII. Melaxotus. 

 ee. Tarsal claws simple. 



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

 dull sooty brown. XXXIY. Limoxius, 



if. Hind tarsi with first joint elongate. 

 g. Prosternal lobe very short. 



//. Antennae 11-jointed; metasternum acute. Campylis. 

 lih. Antennae 12-jointed; metasternum obtuse. Pityobiis. 

 gg. Prosternal lobe long. 



i. Sutures of prosternum single ; thorax usually distinctly 

 longer than wide. XXXY. Athous. 



ii. Sutures of prosternum double ; thorax scarcely longer than 

 wide, more convex. XXXYI. Leptoschema. 



(hi. Front not margined : usually slightly concave. 



j. Sides of mesostemal cavity not protuberant ; size usually medium 

 or small ; color rarely uniform black. 

 Jc. Tarsi simple, filiform. 



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

 of antenna? small : length 6.5-7 mm. XXXYII. Blades. 

 //. Prosternum lobed in front. 

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

 elytra striate ; length 11-12.5 mm. XXXYIII. Xothodes. 

 mm. Lobe of prosternum long. 



;/. Front convex; hind coxal plates scarcely narrower at the 

 outer end ; length 6.5-7.5 mm. XXXIX. Serices. 



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

 rower at outer end. 

 o. Tarsal claws simple ; color often variegated. 



XL. CORYMBITES. 



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

 bronzed. elytra reddish-brown. XLI. Oxygoxits. 



/,•/>•. Tarsi with the second and third joints lobed beneath. 



XLII. Asaphes. 



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

 mm., color uniform black. XLIII. YIelanactes. 



