FALL AND COCKERELL. 245 



arrangement it would come nearest to entering Group F, none of 

 the members of which it at all resembles. The rotundate clypeus 

 is a rare character, possessed by only three other species in our 

 fauna, viz. — rufipes, depressus and rxibripennnis, in ail of which, 

 however, the gense are either moderately or sharply prominent, 

 giving the head an essentially different aspect. 



Aphodius umbricollis n. sp.— Form broad, parallel, moderately con- 

 vex; head and prothorax piceous, with pale outer margins, elytra dull rufotes- 

 taceous, under surface and legs reddish-brown. Head finely closely punctate 

 throughout, not evidently tuberculate ; clypeus broadly not deeply emarginate, 

 sides rounded ; gente prominent, subrectangular. Prothorax one-half wider than 

 long, scarcely at all narrowed in front, sides broadly rounded, margin explanate; 

 base rather strongly sinuate each side and without marginal line; punctuation 

 fine, moderately close, intermixed laterally with numerous larger punctures. 

 Elytra subequal in width to the prothorax, very finely striate, striae finely closely 

 punctate; intervals wide, nearly flat, with numerous fine punctures which show 

 no trace of serial arrangement. Beneath alutaceous, mesosternum obtusely 

 carinate between the coxae; metasternum dull, numerously punctate at sides; 

 abdomen rather sparsely punctate. Femora minutely alutaceous and finely 

 remotely punctate. Anterior tibia; smooth, terminal spur slender, rather strongly 

 curved. Basal joint of hind tarsus a little longer than the two following. 

 Length 5S-6 mm. 



Described from a small series of specimens taken by the writer 

 along the dry bed of the Rio Grande River at El Paso, Texas, in 

 November, 1889. A single specimen has since been sent me by 

 Mr, Wickham who took it at Albuquerque, New Mexico, 



This species should be placed near explanatus, the latter differing 

 in its larger size, angulate clypeus, more densely punctate thorax, 

 and more strongly punctured elytral striae. 



.4pho<lius pliitoiiicus n. sp. — Moderately robust, parallel, convex, black, 

 elytra slightly dull because of minute surface sculpture, tarsi reddish-brown. 

 Head distinctly trituberculate, finely evenly not very closely punctate; clypeus 

 broadly emarginate, sides rounded ; gense obtusely rounded. Prothorax three- 

 fourths as long as wide, sides parallel behind, a little narrowed in front, base 

 faintly sinuate each side of the middle and with fine marginal line; punctuation 

 fine, rather sparse, with intermixed larger punctures, which are more numerous 

 laterally. Elytra equal in width to the prothorax and very nearly twice as long ; 

 strise fine, finely not very closely punctate ; intervals finely irregularly biseriately 

 punctate. Beneath alutaceous and dull, the femora very feebly so, the latter 

 sparsely punctate. Mesosternum not carinate; metasternum sparsely punctate 

 at sides; abdomen morenumerously punctured. Anterior tibiae smooth in front, 

 tridendate, margin strongly crenate above. First joint of hind tarsus as long as 

 the two and one-half following ; terminal tibial spinules unequal. Length 6 mm. 



TEANS. AM. ENT. SOC. XXXIII. JULY, 1907. 



