THE LAMETJJCOitN BKETLES. 



have been taken 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., Ill, 

 1870, ] 10-134. 

 Horn. "Synopsis of Aphodiini of the United States," in Trans. 



Amer. Ent, Soc, TIT, 1871, '2S4-297. 



Horn. "A Monograph of the Aphodiini inhabiting 1 the United 

 States," in Trans. Amer. Knt. Soc,, XIV, 1887, 1-110. 



KEY TO INDIANA GENERA OF APHODIINI. 



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



aa. Mandibles concealed beneath the clyi>eus. 



6. Hind tarsi with triangular joints. VII. PSAMMODIUS. 



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



c. Head roughly granulate ; thorax transversely grooved. 



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



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



nate. VIII. PLEUROPHORUS. 



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



tral segments not carinate. KIIYSSEMUS. 



cc. Head punctured or slightly rugose; first h've strife of elytra not 



reaching apical margin. 



c. Outer apical angle of hind tibia? prolonged, spiniform ; color 

 black. IX. AT^NIUS. 



ce. Outer apical angle of hind tibia? obtuse. 



/. Front tibia? with upper teeth of outer margin obsolete. 



DIALYTES. 



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

 ply striate; color usually variegated. X. AFITODIUS. 



VI. ^EGIALIA Lat. 1807. (Gr, "shore.") 



In this genus the mandibles and labrum are visible beyond the 

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

 roughened with small tubercles; legs stout and strongly fossorial; 

 front tibiae broad and with large teeth on outer side. 



1739 (5469). ^EOIAMA CONFEIJTA Morn. Trans. Amer. Ent. Soc., Ill, 1871, 



294. 



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

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

 Thorax 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 



