f)Sr» FAMHi'i' T.. — SCARAB.EID.E. 



Trll)e IV. GEOTRTTPINI. 



RoitndcHl, convex licctlcs h.iving the iiiaiulihics jiiid hibruin 

 prominent, of horn-like textnre; antennaj ll-joiuted, club 3-jointed, 

 variable in form ; elytra usually strongly striate, covering the abdo- 

 men ; the middle coxa', ventral segments and tarsal claws as in Tribe 

 in. The thorax of some males, and more rarely the head, is armed 

 with horns or tubercles. Most of the species live in excrement; 

 others, according to Horn, are veritable hoboes, "wandering about 

 without visil)le means of support." The principal literature treat- 

 ing of the North American members of the tribe is as follows : 



Horn. — "Notes on Genera of Coprophagus ScarabaBidEe of the 



U. S.," in Trans. Amer. Ent. Soc, III, 1870. The genera 



Braihjcinetiis. Bollxnu ras and Odoiittnis are treated on pp. 



48-50. 



Horn. — "Geotrnpes of Boreal America," in Trans. Amer. Ent. 



Soc, I, 1868, 313-322. 

 Horn. — "Synopsis of the Geotrupes of the U. S.," in Trans. 



Amer. Ent. Soc, VIII, 1880, 145. 

 Blaiichard, FredcricJ:. — "Some account of our Species of Geo- 

 trupes," in Psyche, V, 1888, 103-110. 

 Sell (V If (r, C'Ar/.s.— "On Bradycinetus and Bolboceras of North 

 America, with Notes on other Genera," in Ti-ans. Amer. Ent. 

 Soc, XXXII, 1906, 249-278. 

 Of the five genera of Geotrupini recognized from the United 

 States, re]ir('scniatives of four hav(^ bc>on taken in Iiuliana : 



KFA' TO INDIANA GENERA OF GEOTRUPINI. 



a. Chib of anteniiiv large, vomul, convex on both sides. (Fig. 4, No. 14.) 

 ft. Eyes only imrtially divided by a jirocess from tlie side of bead. 



XII. ROLBOPERAS. 



hi). Eyes entirely divided. 



e. Color above black and rcddisli-brown : jirocess between tbe middle 

 coxiT' with an erect tooth-like elevation. 



XIII. BOUIOCEROSOMA. 



cc. Color above nnifonn chestnut brown ; process l)etween the middle 



cox;o without a tooth-like elevation. XIV. Odont.eus. 



(((t. Clnli of antennjie smaller, composed of leaf-like plates. XV. Geotrupes. 



XII. Bolboceras Kirby. 1818. (Gr., "bull + horn.") 



This g(^nus is principally distinguished by having the eyes only 

 partly divided and by the iiiiddle coxa' being continguous or ver\' 

 close together. 



