Goleopterological Notices, V. 535 



scribed from the United States. The type seems to be a female. 

 This species is much smaller and narrower than princeps, 



Oi>IAI.OI>£S Ericlis. 



Of this interesting genus we have three species which may be 

 distinguished as follows : — 



Posterior tibiae with three external spines ; punctures of the pygidium and 



propygidium not interrupted beliind texaiillS Mars. 



Posterior tibiae with four spines. 



Propygidium coarsely punctate only toward the sides, the two areas of 

 punctuation feebly united at apical fourth by a transverse band composed 

 of very fine feeble punctures ; pygidium coarsely punctured throughout 

 except in anterior third ; elytra without a marginal stria along the apex. 



luliricans n. sp. 



Propygidium coarsely punctate, the punctures becoming remote near the 



center of the disk, minute along the apex ; pygidium coarsely punctate, 



the punctures fine along the anterior margin and almost obliterated toward 



apex ; elytra with a marginal stria along the apex. 



vitreoliicens n. sp. 



Texanus is unknown to me, but may be readily identified by the 

 structure of the hind tibiae ; it is much narrower and more elon- 

 gate than luhricans or grossus. The species are all intensely 

 black, very highly polished and feebly sculptured. 



O. lulbricans. — Broadly oval, the extremely minute punctulation rather 

 sparse but dense and distinct near the scutellum. Head concave in the 

 middle, finely punctulate, the marginal stria subhexagonal, feebly reentrant 

 in the middle, subeutire. Prothorax not quite twice as wide as long, the well 

 marked and deflexed apical angles separated by two-fifths of the basal width; 

 sides oblique, nearly straight, not distinctly sinuate near the middle ; margi- 

 nal stria distinct at apex, very faint at base ; lateral deep, entire ; disk with 

 a small ante-scutellar puncture, finely and not very densely punctured along 

 the sides, almost equally from apex to base. Scutellum with a discal punc- 

 ture. Elytra a little more than one-half longer, and, at the middle, but slightly 

 wider than the prothorax ; strise fine, that of the flank beginning slightly 

 behind the humeri and becoming obsolete and broken toward apex ; humeral 

 excessively fine, extending to basal third ; subhumeral arcuate, beginning at 

 the middle and extending to the apex ; first dorsal long but not attaining 

 base or apex ; second not attaining the base and broken into an uneven series 

 of punctures behind ; third extending not quite to the middle. Propygidium 

 not impressed. Prostermmi very broadly i-ounded at apex and extremely feebly 

 margined, rounded and slightly dilated behind ; mesosternum very short, 

 broadly, deeply sinuate, the marginal stria somewhat narrowly interrupted. 

 Anterior tibiae strongly 4-dentate, the intermediate with three strong teeth 



