Scarabaeidae of Nebraska 65 



Clypeus separated from the front by a more or less distinct 

 suture 37 



37. Tarsal claws toothed (p. 211) Phyllophaga 



Tarsal claws simple (p. 234) Dyscinetus 



38. Mandibles visible from above, serrate or toothed on the outer 

 margin (p. 236) Ligyrus 



Mandibles usually not visible from above, and not toothed on the 

 ouU r margin (p. 237) Aphonus 



39. Epimera of mesothorax extending up between the rear corners 



of the pronotum and the base of the elytra (p. 237) Euphoria 



Epimera of mesothorax below the rear corners of the pronotum, 

 and not extending up, between the pronotum and the base of the 

 elytra (p. 243) Osmoderma 



LAPAROSTICTI 



Abdominal spiracles situated in the membrane connect- 

 ing the sternites and tergites, the last spiracle covered by the 

 elytra; ligulae always distinct from the mentum; the species 

 all living on decomposing organic matter, many of them in 

 excrement and a few in fungi. 



COPRINI 



Body relatively broad and rounded in outline; clypeus ex- 

 panded covering the mouth parts; hind tibiae usually with a 

 single spur ; last tarsal segment usually without the two erect 

 setae between the claws; elytra subtruncate, leaving the 

 pygidium exposed; abdomen with six firmly united sternites. 



Canthon Hoffmansegg 



The genus Canthon is peculiar to the New World, ninety 

 seven species, mostly from tropical America, being recorded 

 by Harold in his monograph. Of these only seven have thus 

 far been taken in Nebraska, although at least two additional 



171 



