■i.iiii jjAiuiiiiiuuuiUN ui'.ETLES. 921 



have been tMlven in Indiana, while those of two others may occur. 

 The following is the principal literature treating of the North Amer- 

 ican representatives of the tribe : 



Horn. — "Description of the species of Aphodius and Dialytes 



of the United States,'' in Trans. Amer. Entom. Soc, III, 



1870, np-134. 

 • Horn. — ' ' Synopsis of Aphodiini of the I'nited States, ' ' in Trans. 



Amer. Ent. Soc, III, 1871, 284-297. 

 Horn. — "A ]\ronogra])h of the Aphodiini inhabiting the United 



States," in Trans. Amer, Ent. Soc, XIV, 1S87, 1-110. 



KEY TO INDIANA GENERA OE APHODIINI. 



a. Mandibles visible beyond the clypeus. VI. .iEeiALiA. 



aa. Mandibles concealed beneath the clypeus. 



&. Hind tarsi with triangular joints. VII. Psammodius. 



66. Hind tarsi with elongate, usually cylindrical, joints, 

 c. Head roughly granulate ; thorax transversely grooved. 



d. Thorax without a marginal fringe of hairs, the grooves short, 



confined to the sides ; one or more of the ventral segments cari- 

 nate. VIII. Pleubophobus. 



dd. Thorax with scale-like marginal hairs, the grooves entire; ven- 

 tral segments not carinate. Rhyssemiis. 

 cc. Head punctured or slightly rugose ; first five strife of elytra not 

 reaching apical margin. 



e. Outer apical angle of hind tibiae prolonged, spiniform ; color 



black. IX. At^nius. 



ee. Outer apical angle of hind tibias obtuse. 



/. Front tibiae with upper teeth of outer margin obsolete. 



Dialytes. 

 //. Front tibiae strongly toothed on the outer margin; elytra sim- 

 ply striate; color usually variegated. X. Aphodius. 



VI. Ji:Gi.\LiA Lat. 1807. (Gr., "shore") 



In this genus the mandibles and labrum are visible beyond the 

 clypeus when viewed from above; head more or less granulate or 

 roughened -with small tubercles; legs stout and strongly fossorial; 

 front tibiffi broad and with large teeth on outer side. 



1739 (5469). ^gialia confeeta Horn, Trans. Amer. Ent. Soc, III, 1S71, 

 294. 

 Oblong, convex, slightly broader behind. Piceous, the elytra sometimes 

 reddish-brown ; antennre paler. Head with rather coarse, close granules, 

 rhorax twice as wide as long, narrower in front, hind angles very obtuse ; 

 base curved, its marginal line distinct ; surface coarsely and sparsely punc- 

 tured, the sides smoother and with a small rounded pit. Elytra as wide at 



