AMERICAN COLEOPTERA. 295 



iit extremity; in the remaining genera the maxillai are entirely mem- 

 branous. 



Eitpnrin and Af.'svinn have the hinder tibiae deprived of transverse 

 ridges and are closely allied. The former have the middle and hind 

 tibia; arcuate, convex inwardly, while in the latter the tibite are nearly 

 straight. Euparia has the sides of the thorax, especially in front, ex- 

 planatc, and broader than the elytra. 



In the last three genera the eyes are partly visible when the head is 

 deflexed and almost entirely concealed in all the rest ot the genera. 



Dialijtcs alone has the head perfectly vertical in repose, in all the 

 other genera the head is oblique. 



The following new species have been discovered since the publica- 

 tion of the first part of this paper. 



Aphodius ochreipennis, n sp. — Black, shining, elytra and legs ochreous. 

 Head black very minutely punctulate and bordered anteriorly with rufous 

 clypeus feebly emarginate at middle, broadly rounded on each side. Thorax 

 n."deratel3' convex, nearly twice as broad as long, sides moderately rounded 

 slightly e.xplanate at hind angle which is broadly rounded ; surface sparsely 

 and very finely punctulate at middle, coarsely toward the sides densely and 

 more finely along the margin and in the concavity near the hind angles; base 

 broadly rounded and without marginal line. Elytra ochreous broader behind 

 middle moderately convex, fineh' striate, strise finely punctured, intervals fiat, 

 jiunctulate. Body beneath black, sparsely clothed with yellowish hairs. 

 Tibise fimbriate with unequal spinules. Length .26 inch; 6.5 mm. 

 One 9 specimen from Owen's Valley, California, 

 liy the characters above given it will be seen that this species 

 .should be placed in Group L. of Ajihodius near poUfus. with which it 

 agrees in the ab.sence of the basal marginal line and in the concavity 

 near the hind angle caused by the margin being distinctly explauate. 



A. rugifrons, n. sp. — Oblong, black shining, elj'tra black with small paler 

 markings. Head deeply and rugosely punctured; clypeus emarginate at mid- 

 dle, on each side, an acute vertical tooth and externally distinctly angulate ; 

 genjB obtusely rounded not prominent. Thorax moderately convex, one-third 

 broader than long, sides very feebly rounded, basal marginal line very indis- 

 tinct: surface with moderate punctures closely placed and evenly disposed^ 

 Elytra with feebly rounded sides, black with suture and apical margins testa- 

 ceous, and two subhumeral linear spots and a V shaped spot at three fourths of 

 the same color ; surface striate, strire f)unctured intervals very feebly convex 

 sparsely punctulate. Body beneath piccous, femora yellowish, tibiis darker. 

 Mesosternum not carinate, very sparsely punctured ; tibi.T3 fringed witii short 

 equal sj)inules. Length .15 inch ; .3.75 mm. 



This species should form a type of a group by itself near Group G. 

 characterised by the strong angulation of the clypeus on each side of 

 the tooth and the not carinate mcbosterum. The head is unu.-ually 



