THE GROUXD BEETLES. 



IT:; 



Tribe ITI. HARPA UNI. 



Antennae usually slender, arising from beneath a slight frontal 

 ridge, two basal joints, sometimes a portion of the third, glabrous. 

 Head often large, usually moderate, not narrowed to a neck; labrum 

 moderately prominent, truncate or emarginate; mandibles stout, 

 acute at tip and without bristle-bearing puncture on outer side; 

 mentum broad, emarginate. with cr without a median tooth. 

 Thorax variable in form, with a lateral seta, but none in the hind 

 angles. Body sometimes subpedunculate ; scutellum distinct. Ely- 

 tra usually margined at base, sides narrowly inflexed. surface stri- 

 ate, often densely punctured, either pubescent or smooth, with or 

 without dorsal punctures. Prosternum not prolonged ; hind coxi^e 

 contiguous : front tarsi with the outer apical angle spinous or ob- 

 tusely prolonged. 



The tribe is a large one. being represented in the United States 

 fauna by 17 genera. 11- of which occur in Indiana. Many of these 

 have been established on trivial or sexual characters, so that they 

 are difficult to distinguish unless both sexes are at hand. To make 

 shorter an otherwise long generic key. the genera are distributed by 

 Hern among four subtribes. three of which are represented in 

 Indiana. 



KEY TO INDIANA SUBTRIBES OF HABPALINI. 



a. Front tarsi of male feebly or not at all dilated, pilose or spinose be- 

 neath; eyes, except in Agonoderus, small and widely separated from 

 the mouth beneath; oblong or oval convex species, usually piceous or 

 brownish-yellow in hue. Subtribe A., p. 173. 



<;■!. Front tarsi of male dilated: less convex, black, brown or picems. rarely 

 brownish-yellow species. 

 h. Dilated joints of front tarsi with two rows of small scales beneath. 



Subtribe B.. p. ITS. 



hi). Dilated joints of front tarsi densely spongy pubescent or brush-like 

 beneath. Subtribe C, p. 193. 



Subtribe A. (Daptt.) 

 To this group belong five Indiana genera, separated as follows: 



KEY TO INDIANA GENERA OF GfiOl P A. 



a. Mandibles prominent, crossing at an angle, deeply strigose at tip : body 

 subpedunculate: front tibia? strongly fossorial. LXI. Geopixis. 



aa. Mandibles not prominent, at most feebly crossing: body not peduncu- 

 late. 



