Horn.] Jo [Feb. 21, 



another near the side. Body beneath and legs black, densely punctulate, 

 more shining than the upper surface and sparsely cinereo-pubescent. 

 Length .2G-.40 ; 7-10 mm. 



The form above described in which the thorax has the two black spaces 

 on the disc and the elytra each with two black lines, is that which is most 

 commonly seen ; from this the elytra may become almost entirely black 

 or entirely ferrnginous. The totally black forms resemble E. pemyl- 

 vaniea and the ferruginous E. ferruginea. The form of the eyes and 

 antenna; distinguish it from the former, and the form of the thorax from 

 the latter. 



Occurs from Pennsylvania to Georgia. 



E. ferruginea, Say. Journ. Acad. Ill, p. 298. 



Black, densely clothed with cinereous, luteous or ferruginous pubes- 

 cence. Head shining, moderately punctured. Thorax slightly wider than 

 long, broadly sub-campanulate, sides in front arcuate, surface shining, 

 coarsely but not densely punctured. Elytra finely scabro-punctate. Body 

 beneath black, shining, moderately punctured* sparsely pubescent. Length 

 .12-. 36 inch; 3-9 mm. 



The forms with paler vestiture resemble E. sericans, but the thorax is 

 more coarsely and less densely punctured and more shining, and the 

 pubescence coarser and less dense. The species here described is not that 

 of Leconte (Proc. Acad. 1853, p. 341), which is merely the ferruginous 

 variety of the preceding species. Say's type was collected on the Plains 

 west of the Mississippi, and doubtless is the one here described. It is 

 one of the most abundant species of the region indicated, extending from 

 Dacota to New Mexico. 



E, sericans, Lee. New Species, p. 158 ; ? immerita, "Walker, Nat. Brit. 

 Col. II, p. 330. 



Black, rather densely clothed with cinereous pubescence tending in 

 color to luteous. Head densely and finely punctured. "Thorax as wide 

 as long, sides in front broadly arcuate to apex, surface sub-opaque densely 

 and finely punctured. Elytra densely punctato-scabrous. Body beneath 

 more shining than above, less densely punctulate. Length .30-. 50 inch ; 

 8-13 mm. 



The specimens with the ferruginous pubescence resemble the preceding 

 species, but may be at once distinguished by the much more dense punctu- 

 ation of the head and thorax. 



Occurs abundantly from Kansas to New Mexico and Oregon. 



E. pruinosa, Lee. New Species, p. 158. 



Similar in form to the preceding, and differs in the pubescence being 

 very short, sparse, white and not concealing the surface Amt merely giving 

 it a pruinosa aspect. The punctuation of the surface is also much finer 

 and less dense. Length .30-. 50 inch ; 8-12 mm. 



Occurs with the preceding species, but not farther west than Utah. 



