34 O. H. HORN, M. D. 



Bides regularly arcuate, gradually narrowing to base and continuing regularly 

 the curve of the sides of the thorax, lateral margin acute at basal third; sur- 

 face feebly convex, opaque, sparsely pubescent and punctured, pubescence ar- 

 ranged so that the surface appears sub-striate. Body beneath black, shining, 

 sparsely punctured and with slight pubescence. Tarsi spinulose. Lenglh .38 

 — 42 inch ; 9..')— 10.5 mm. 



The spinulose tarsi not dilated in the male, the slight dissimilarity 

 between the spurs of the anterior tibijc in the sexes (less marked, 

 however, in this species than in any other of the gwup), the anterior 

 spur of the female larger in every v^ay than the posterior, at once in- 

 dicate the affinity of this species with those of the tricostatu group 

 and not with opacd, with which a slight superficial resemblance would 

 seem to associate it. It may be at once known from every Elemles in 

 our fauna by its regularly oval form, equally narrowed at the two ex- 

 tremities, the thorax squarely truncate and its sides regularly arcuate 

 and gradually narrower from base to apex. 



Numerous specimens of this species were kindly presented by Mr. 

 William Jiilichs, of New York, by whom they were procured from 

 Texas. 



E. texaua, Lee. — From collections recently made in the northern 

 parts of Texas I have become convinced that this species is merely a 

 large variety of suturaiis, Say. 



IPHTIII9IUS, Truqui. 

 I. zopheroides, n. sp. — Black, shining, form strongly recalling Zopherus. 

 Head sparsely, between the eyes coarsely and very deeply confluently jiunc- 

 tate. Thorax trapezoidal, wider in front, apex feebly emarginate at middle, 

 anterior angles very broadly rounded, sides at anterior third parallel, thence 

 gradually narrowed to the base which is truncate, disc convex longitudinally 

 and transversely, shining, sparsely punctured. Elytra oblong, slightly broader 

 behind the middle, convex, shining and with eight discal and a marginal row 

 of deep, coarse, distantly placed punctures. Body beneath black, shining, 

 mesosternum densely and coarsely punctured, abdomen sparsely punctured 

 and slightly wrinkled longitudinally. Length .80 inch; 20 mm. 



The mentum of this species differs notably from that of our other 

 species, being trapezoidal and strongly convex at middle, the usual 

 form being broader with rounded angles, a median groove and on each 

 side slightly concave. This variation taken in conjunction with the 

 general form, which is remarkably Zopheroid would seem to indicate 

 the propriety of separating the species generically. A comparison of 

 the superficial characters shows nothing greatly at variance with the 

 other Iphthimus except the much more convex form, although the 

 thorax is somewhat longer and the hind angles not prominent. 



