108 GEORGE H. HORN, M. D. 



and with two punctures as in amaroidcs. Body beneath sculptured 

 as in the preceding species. Length .50 inch ; 12.5 mm. 

 Rather abundant at Rock Island, Illinois. 



0. cuprseus, Cbaud. Bull. Mosc. 184.S, iv, 761 ; (Stenous) Chaud. loc. cit. 1857, 

 iii, 30j ^CMCot^ac'iy^ws, Ferte, Ann. Ent. Soc. France, 1851, 273. — Form elongate. 

 Color seneous-bronze, disc of elj'tra faintly cupreous, margin green, shining. 

 Thorax as broad at base as base of elytra, hind angles rectangular. Elytra! 

 Btrise very faint, and with punctures distantly placed in their entire length, 

 becoming less distinct toward the apex, seventh stria entirely obliterated. 

 Intervals flat the third with two punctures behind the middle. Body beneath 

 piceous, metasternal side pieces with very large impressed punctures. Femora 

 p'ceous, tibiae and tarsi pale yellowish. Length .40 inch; 10 mm. 



Occurs from Pennsylvania to Louisiana and Missouri. 



0. Lecontei, Chaud. {Stenous) Bull. Mosc. 1857, iii, 41 ; quatuordecimstriatus % 

 Lee. Ann. Lye. iv, 331. 



Less elongate than the preceding species. Color aeneous-bronze, 

 less shining. Thorax with sides slightly more rounded, hind angles 

 rectangular but not well defined at tip. Striae of the elytra very dis- 

 tinct, deeper than either ciipreeus or eler/ana, and entirely impunctured. 

 the seventh obliterated; intervals flat, the third with two faint punc- 

 tures as in cvprseus. Body beneath as in ctqjrsens. Legs entirely 

 piceous. Length .40 inch ; 10 mm. 



The characters thus summarily given will serve to distinguish it 

 from cupratus or elcgans. As in the former species the thorax is as 

 broad at base as the base of the elytra, and both have the first tarsal 

 joint of male shorter and less distinctly pedunculate than the following 

 species. 



Occurs in Louisiana. 



0. elegans, Lee. Ann. Lye. v, p. 180, — Form elongate. Color cupreous-metal- 

 lic, with broad margin of green. Thorax longer than the width at base, sides 

 rounded, sinuate behind, narrower at base than at middle, hind angles rectan- 

 gular. Elytra broader at base than base of thorax, striae moderately deep, 

 punctured faintly only at base, seventh totally obliterated, intervals flat, dis- 

 tinctly alutaceous, and with two punctures, as in cuprceus, placed near the 

 stria. Body beneath and legs as in cuprocus. Length .40 — .42 inch; 10 — 10.5 

 mm. 



Occurs in Arizona along the banks of Gila River. 



0. quatuordecimstriatus, Chaud. Bull. Mosc. 1843, ii, 759 ; picipes Lee. Proc. 

 Acad, ii, 52; Ann. Lye. iv, 3 Jl ; stenocephala, Laporte (Crossocrepis) Ann. Ent. 

 Soc. France, 1854, 271. — Color black, with distinct aeneous-tinge. Thorax with 

 rounded sides, gradually broader from apex to base, and as broad at base as 

 the elytra. Elytra moderately deeply striate, striae impunctured, the seventh 

 totally obliterated. Intervals very feebly convex, the third with two punc- 

 tures near the second stria. Body beneath and legs, piceous black, side pieces 

 of metasternum with coarse impressed jjuuctures. Length .46 inch; 11.5 mm. 



