o26 G. H. HORN, M. D. 



small, faint; as broad at base as long, at apex scarcely a third narrower, sides 

 gradually rounded and slightly broader behind the middle and very slightly 

 narrowed to the basal angles which are obtuse. Elytra slightly broader be- 

 hind the middle, somewhat broader at base than the thorax and obtuse ot 

 apex; color black, at margin slightly purple; surface sparsely clothed witli 

 fine, short, ferruginous hairs, finely striate, strise with distant punctures, inter- 

 vals densely punctato-granulate. Body beneath black, shining, sparsely punc- 

 tured. Femora reddish-yellow sparsely punctured, coxije and trochanters 

 black, hind trochanters at base only blackish. Tibiaj and tar&i deep black 

 with a slight tinge purple. Length .68 % inch; 15,5 — 17 mm. 



This species approaches laticollis, in color und general aspect and au- 

 r/ustus, in form of thorax. It differs from all our species in the black 

 antennae and trophi and the femora and tib'.ae being of dissimilar color. 

 The elytral striae are finer than in laticollis, but the granules rather 

 coarser. The thorax is rather more fiu'ily punctured, at least not so 

 apt to become confluent. 



For an opportunity of examining this species I am indebted t& Dr. 

 k^. V, Summers, of St. Louis, who kindly placed one at my disposal. 

 It is very rare, only two specimens being known, taken in high sandy 

 places in Missouri probably near St. Louis. 



C. orbus, n. sp. — Color black, opaque with very fafnt tinge of purple. .Body 

 beneath black, more shining and faintly bluish-iridescent. Legs black. Head 

 moderate, oval ; occiput sparsely punctured vertical and frontal regions smooth, 

 at the sides sparsely punctured and with longitudinal furrows very indistinct: 

 color black with distinct purple tinge. Antennae piceous at base becoming 

 brownish toward the tip; palpi piceous, at articulations and tip of last joint 

 ])iceo-rufous. Thorax nearly flat moderately convex across the apex, base 

 about one-tenth broader than the leragtli, apex nearly one-third narrower than 

 the base. Sides moderately rounded, broadest slightly behind the middle and 

 then scarcely narrowed to base, hind angles obtuse. Surface evenly punctured 

 ))uuctures rather coarse and not densely placed, median sulcus faint, abbre- 

 viated at either end, basal impressions shallow but extending one-third the 

 length of thorax. Elytra oval broadest at middle, length to breadth as ojie and a 

 half is to one; color black, very sparsely clothed with short brownish hairs; 

 strise fine but with rather large punctures placed at a distance from each other 

 nearly equal to half the width of an interspace; interspaces sparsely and finely 

 j)unctulate. Body beneath black shining, parapleurse sparsely punctured, 

 sterna smoother; abdomen with very sparse punctures and slightly wrinkled. 

 Legs black shining, femora nearly smooth. Length .65 — .68 inch; 16 — 17 

 mm. 



Occurs in central and western Texas probably also in the adjoining 

 regions of Mexico. 



liesembles in form rufijics var. hrevicolUs, very accurately, while its 

 sculpture (excepting the coarser punctures of the striae) is very nearly 

 that oi'/nsicornis. 



This species has been a long time in our cabinets and I have, until 



