NORTH AMERICAN COLEOPTERA. 195 



Thorax without lateral spine or tubercle. 



Clothed with pubescence variable in color from cinereous to ochreous, the 

 median paler elytral band not very distinct, the spots indistinct ; .56-.66 

 inch: 14-16.5 ram cingiilata Say. 



O. pusitiilata Lee. Proc. Acad. 1854, p. 82. 



The only specimen I have ever seen is the type in cab. LeConte and 

 not now before me. It is evidently closely allied to alho-marginata 

 Thorns. 



Occurs at Laredo, Texas. 



O. putator Thorns. Physis. ii, p. 81. 



The specimens before me are all smaller than the measui'ements given 

 by Thomson but the description otherwise corresponds so closely that 

 there can be very little doubt of their identity. 



Occurs in Arizona, also in Mexico. 



O. texaiia n. sp. — Moderately elongate and convex, brownish, moderately 

 densely clothed with pale gray pubescence, less dense at basal fifth and apical • 

 third of elytra. Thorax wider than long, distinctly narrowed behind the small 

 acute lateral tubercle, surface densely finely punctate with a few conspicuous 

 coarse punctures sparsely placed, without denuded dorsal callosities. Elytra 

 punctate, the punctures very coarse and close at base, sparser and finer toward the 

 apex, surface cinereo-pubescent, with reddish yellow spots of denser pubescence 

 arranged in four irregular series. Body beneath densely cinereo-pubescent. Legs 

 sparsely pubescent. Length .60 inch ; 15 mm. 



This species might readily be mistaken for cingulafa, but the very 

 distinct lateral spine of the thorax and the~ more evident darker elytral 

 spots will readily distinguish it. There are no distinct thoracic callosities, 

 but the median line may be abraded. From Mr. Bates' description this 

 species is also allied to scitula (Biologia, v, p. 126), but this has dorsal 

 callosities and the thorax not narrowed behind the lateral spine. 



Two specimens, Texas. 



O. ciugulata Say, Journ. Acad, v, p. 272 ; Lee. Journ. Acad. 2, ii, ]>. 165. 



Variable in the color of its pubescence, and never with the median 

 baud of the elytra as distinct as in the two preceding species. The tho- 

 rax has no dorsal callosities, and the lateral spine is entirely wanting or 

 reduced to a very faint tubercle. In form the thorax may be truly cy- 

 lindrical (in some females) or quite as much narrowed at base as in 

 jmtator or texana. 



Occurs from the Middle States to Texas. 



