242 AMERICAN COLEOPTERA. 



its nonverrucose clypeiis and longer tarsal claws, and differs from all 

 except ccelatus in the two oblique tibial ridges. The terminal spin- 

 ules of middle and hind tibiae are even and close set in ambiguus, 

 longer and more widely spaced in cmlahis. If referred to Aphodius 

 the present species does not fit well anywhere, but seems closest to 

 nanus, in which, however, the front is rugulose, the form narrower, 

 the tibite and tarsi normal. 



Apliodiiifii iiioqiiiniis n. sp. — Form moderately convex, nearly parallel 

 ( % ), or slightly broader behind ( 9 ) ; rather pale reddish-brown throughout, the 

 antennai a little paler; margins fimbriate throughout. Head rather sparsely 

 punctured, frontal line elevated but not distinctly divided into tubercles, a short 

 transverse carina at middle of clypeus, front margin of latter obtusely biangu- 

 late each side of the median sinus, the inner angulation more sharply defined ; 

 gense moderately prominent but obtuse. Prothorax ( % ) nearly twice as wide as 

 the head, one-half wider than long, slightly narrowed in front; in the female 

 relatively smaller and more obviously narrowed anteriorly ; base nearly evenly 

 rounded, barely perceptibly sinuate each side, basal marginal line fine but dis- 

 tinct, hind angles rounded, feebly defined ; punctuation not close, somewhat 

 uneven in size, quite regularly disposed. Elytra a little wider than the pro- 

 thorax, strife moderate, not very closely punctate; intervals very slightly con- 

 vex, each with a series of fine punctures each side near the striae. Beneath 

 sparsely punctate and with sparse yellow hair; mesosternum not carinate. Front 

 tibiae tridentate, the upper tooth nearer the base than to the apical one, margin 

 above crenulate, face smooth; terminal spur rather slender and feebly arcuate. 

 Short spur of middle til)i8P scarcely more than one-third the length of the long 

 spur ( % }, relatively a little longer ( 9 ). Hind femora with a row of setigerous 

 punctures parallel to the posterior margin ; first joint of hind tarsus subequal to 

 the next two. Length 5-5i mm. 



Holbrook, Arizona. A single pair sent by Mr. Wickham. 



This species must be referred to Horn's Group A, and is closely 

 allied in most respects with denticulatiis. The latter on comparison 

 is a little larger and more robust, always black, the head relatively 

 wider, the thorax less narrowed in front, and the basal joint of hind 

 tarsus slightly shorter. 



AplloUiuM abiisiis n. sp. — Robust, strongly convex, i)arallel, black, shin- 

 ing, legs dark rufous. Head moderately tuberculato-rugose anteriorly, punctate 

 posteriorly; vertical tubercles faint; clypeus sharply augulate each side; genae 

 very prominent and nearly rectangular. Prothorax nearly equal in width to the 

 elytra, sides parallel, a little rounded in front, surface sparsely finely punctate at 

 middle, rather densely along the sides, especially near the front angles; the 

 punctures laterally fine and coarse intermixed ; basal marginal line very fine. 

 Elytra parallel, three-fourths as wide as long, striae coarse and rather deep, finely 

 not closely nor crenately punctate ; intervals flat, very finely sparsely punctulate ; 

 seventh interval only about two-thirds as wide at middle as the adjoining ones 



