AMERICAN COLEOPTERA. oil 



The unique iu my cabinet was collecfctl by Mr. Rogers, in Ontario 

 (Canada West) and kindly placed in my collection. 



ANCHASTUS, Lee. 



A. desertus, n. sp. — Pale rufous, inudoiatolj' shining. Head and thorax very 

 coarsi-ly I'liuctured. Antennce with third joint very slightly shorter than the 

 fourtli. Thorax longer than broad, sides feebly rounded and gradually nar- 

 rower from base to apex, basal angles acute prolonged baekvvards and witii 

 but one very distinct acute carina; surface moderately convex. Elytra 

 slightly narrower than the thorax, moderately convex, gradually narrower 

 from base, surface striate, strioe punctured, intervals flat, rather closely punc- 

 tured. Body beneath of same color as above, punctured and sparsely pubc.-^- 

 cent. Length .24 — .30 inch ; 6 — 7.5 liim. 



In this species the coxal plates are strongly dilated internally but 

 not suddenly as in cineretpennis and bican'mifus. The hind angles 

 are unicarinate the outer carina persisting, but not parallel with the 

 margin. The third joint of antennsc is but slightly shorter than 

 the fourth. The addition of species to our fauna, seems to place in 

 doubt the validity of the genera Crepidotritus and Brach/crcpis. 



Not rare at Tort Yuma, California. 



A. sericeus, n. sp. — Pale reddish-brown, shining, surface clothed with short 

 yellowish hairs with decided silken lustre, llead densely and coarsely punc- 

 tured. Thorax nearly square slightly narrower in front, sides anteriorly 

 slightly arcuate, at middle nearly parallel, at base very feebly sinuate; hind 

 angles acute, prominent, strongly bicarinate, surface rather densely but not 

 coarsely punctured, moderately convex, median line feebly channelled. Ely- 

 tra as broad as thorax at base, gradually narrowed to apex ; surface moderate! v 

 convex, feebly striate, striae punctured, intervals flat, distinctly biseriatoly 

 jjunctulate. Body beneath and legs similar in color to the upper surface, shin- 

 ing, punctured, and with yellowish silken pubescence. Prosternal sutures, iu 

 front feebly channelled. Autenure with the third joint longer than the second, 

 and both together scarcely equal to the fourth. Length .12 inch; l(i..'> 

 mm. 



I'^vidently allied to rii/cscens and rufivella^^ and in our fiiuna to 

 (^Bracfii/rrepi's) hicai-inahis, .from which it differs by the form uf 

 thorax, stronger angular carina) and the structure of the antennae, as 

 well as by the less suddenly dilated coxal plates. 



One specimen from Camp Grant, Arizona. 



MONOCREPIDIUS, Esch. 

 M. robnstas, n. sp. — Color variable from pale ferruginous to ochraceous or 

 lirown ; form robust, surface rather densely clothed with short ochreous hairs. 

 Head and thorax ratlier coarsely and deeply punctured with very fine punc- 

 tures densely placed, intermixed. Antenna; as long as head and thorax, third 

 joint scarcely shorter than the fourth and similar, one-third longer than the 

 second. Thorax as long as broad, robust, anteriorly feebly emarginate, angles 

 obtuse, sides rounded in front, slightly sinuate beliind, liind angles j)roloiiged, 



