988 FAMILY L. Si' VKAB/ETD/E. 



confused, especially toward the base. Antennal club as long as stem in 

 female, one-half longer in male. Length 34-17 mm. 



Lake, Laporte and Posey counties; rare. .June 6-August 10. 

 Occurs in sandy localities. 



Tribe II. DYNASTINI. 



Medium-sized to very large robust forms, having the labrum 

 usually invisible; mentum narrowed and subacuminate, rarely trun- 

 cate, in front; tarsal claws equal, not toothed. In some genera the 

 males have the head and often the thorax armed with horns. To 

 the tribe belongs our largest Indiana beetle and in the tropics the 

 largest of known beetles. Seven of the eleven genera comprising 

 the tribe are represented in Indiana. 



The most available literature relating to the North American 

 genera is as follows: 



LeContc. "Notice of three genera of Scarabandse found in the 

 United States," in Proc. Phil. Acad. Nat. Sei., VIII, 1856, 

 19-24. Treats of the genera Ligyms and Aplionux. 



Horn. "Descriptions of New Coleoptera of the United States 

 with Notes on KnoAvn Species," in Trans. Amer. Ent. Soc., 

 Ill, 1871. The genus fucloa i>}mht is treated on pp. 334- 

 337. 



Horn. "Synonymieal Notes and Descriptions of New Species 

 of North American Coleoptera," in Trans. Amer. Ent. Soc., 

 V, 1S'75, 126-156. Synopses of the genera Jjim/rux and Ktra- 

 lirijus are given on pages 143-147. 



Horn. "Contributions to the Coleoptera of the United States, 

 111," in Trans. Amer. Ent. So.-., VIII, 1880, 139-154. This 

 includes a table of species of the genus J'liilriinif;, pp. 

 147-148. 



KEY TO IXDTAXA GENERA OF DYNASTINI. 



(/. Body convex, usually more or less oval; labial palpi inserted at the 



sides of mentum. 

 li. Head and thorax unarmed in both sexes. 



c. Mandibles narrow, scarcely curved; color pale brownish-yellow. 



XXIX. CYCLOCEPHALA. 



<<. Mandibles broad, rounded mi the outer side and curved; color pic- 

 eous or black. XXX. DYSCINETUS. 



1>1>. Head or thorax (sometimes both) armed, or at least bearing a tuber- 

 cle, in both sexes. 



/I. Si/e over .">0 mm.; color piceous or dark reddish-brown; males 

 with the front feet not elongated. 



