74 GEO. H. HORN, M. D. 



This species and desertus are approximated in the table by the 

 comparatively short first hind tarsal joint. They also agree quite 

 closely in color, but differ in the punctuation of the thorax, which, 

 in the present species, resembles abditus in habitus. 



Occurs in Arizona near the southern boundary, also in Texas. 



A. IseTiveiitris n. sp. — Oblong, moderately elongate and convex, piceous 

 brown, shining. Antennae rufotestaceous. Head moderately convex, sparsely 

 punctate, punctures along the occiput coarser, anteriorly and at the sides granu- 

 lately rugose. Clypeus slightly impressed in front, at middle broadly, but feebly 

 emarginate, angulate each side, sides oblique, slightly arcuate, gense moderately 

 prominent obtuse. Thorax less than twice as wide as long, base and apex equal, 

 sides feebly arcuate, hind angles very obtuse, base arcuate with fine marginal 

 line; disc moderately convex with coarse punctures .sparsely irregularly placed 

 at basal half and at the sides, the intervals between these with few finer punc- 

 tures, the apical portion of the disc, immediately behind the head, without coarse 

 punctures. Elytra as wide at base as the thorax, humeri rectangular not dentate, 

 sides nearly parallel, the striae deep, crenately punctate, the punctures crenating 

 the inner side of the interspaces, the interspaces feebly convex on the disc, more 

 convex at apex, with few extremely fine punctures. Mesosternum opaque and 

 punctulate, subcarinate between the coxse. Metasternum almost entirely smooth. 

 Abdomen very smooth, with a very few extremely fine punctures, the segments 

 2-5 as usual, crenate in front. Anterior tibiae tridentate externally, crenate 

 above. Posterior femora scarcely punctulate, the marginal line deep and reach- 

 ing more than half from the knee to trochanter, the posterior tibia with a mod- 

 erately long accessory spinule, the first tarsal joint a little shorter than the long 

 spur. Length .20 inch ; 5 mm. 



This species has a greater resemblance to the species associated 

 with stercorator than to any of those with the angulate clypeus. 

 While the clypeus is very plainly angulate each side it has not the 

 small reflexed tooth of many of the species. The almost absolutely 

 smooth abdomen is a character possessed by but few species among 

 those at present known to me. 



One specimen, southern Arizona (Morrison). 



A. iiiibricatiis Mels. — Oblong oval, moderately convex, piceous opaque, the 

 surface usually covered with a brownish ciuereous coating, elytral intervals with 

 a single row of short scale-like hairs, legs brownish. Antennae and j)alpi pale 

 rufotestaceous. Head moderately convex, densely punctate, the punctures across 

 the occiput coarser, those of the front slightly longitudinally strigose ; clypeus 

 at middle nearly smooth. Clypeus feebly impressed in front; bi-oadly, but feebly 

 emarginate, the angles broadly rounded, sides broadly arcuate, genae feebly 

 prominent, obtuse. Thorax nearly twice as wide as long, slightly narrower pos- 

 teriorly, the sides in front arcuate, the posterior two-thirds nearly straight, hind 

 angles very obtuse, base broadly arcuate without trace of basal marginal line, 

 disc moderately convex, the punctures rather coarse and closely placed at base 

 and sides a little finer in front, but at best faintlv visible from the coating of the 



