088 



F A MTLY L. SCARABiEIDiE. 



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

 female, one-half longer in male. Length 14—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 : 



LeConte. — "Notice of three genera of Scarabaaidte found in the 

 Tutted States," in Proc. Phil. Acad. Nat. Sci., VIII, 1856, 

 19-24. Treats of the genera Ligijrus and ApJwnus. 



Horn. — " Descriptions of New Coleoptera of the United States 

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

 III, 1871. The o^enus Cyclocephala is treated on pp. 334- 

 337. 



Horn. — "Synonymical Notes and Descriptions of New T Species 

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

 V, 1-875, 126-156. Synopses of the genera Ligyrus and Stra- 

 tregus are given on pages 143-147. 



Horn. — ''Contributions to the Coleoptera of the United States, 

 III," in Trans. Amer. Ent. Soc, VIII, 1880, 139-154. This 

 includes a table of species of the genus Phileurus, pp. 

 147-148. 



KEY TO INDIANA GENERA OF DYNASTINI. 



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

 sides of mentum. 

 1). Head and thorax unarmed in both sexes. 



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



XXIX. Cyclocephala. 

 cc. Mandibles broad, rounded on the outer side and curved ; color pic- 

 eous or black. XXX. Dyscinetvs. 



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

 cle, in both sexes. 



d. Size over 30 mm. ; color piceous or dark reddish-brown ; males 



with the front feet not elongated. 



