Coleopterological Notices, III. 23 



Pronotum with a narrow and abruptly limited median impunctate area 

 toward base, which is subcarinate ; elytra generally pale. 



parallelum 

 Pronotum without a median impunctate area except narrowly and vaguely 

 toward base ; elytra usually concolorous. 

 Sides of the prothorax broadly rounded ; pygidium evenly parabolic. 



scliwarzianuui 

 Sides of the prothorax vaguely subangulate in the middle, the punc- 

 tuation very fine, extremely dense ; pygidium triangular with the 



apex narrowly subtruncate vein till mil 



Elytra not wider than the prothorax ; second antennal joint of the male but 

 slightly shorter than the third, the latter equal in length to the fourth. 



paiviiliim 



The forms of Tetropium here mentioned seem certainly worthy 

 of recognition, and as far as can be perceived are as distinct as is 

 usually the case in the allied genera. The color of the elytra varies, 

 it is true, as is usual in this part of the Cerambicidse, but the char- 

 acteristics of sculpture and structure upon which the species have 

 been separated, are of more permanent value. The genus will 

 probably prove to be more fully developed in our fauna than in the 

 European. 



T. parallelum n. sp. — Elongate, moderately convex, parallel, piceous- 

 black, the elytra paler and uniform red-brown, rather dull throughout, the 

 pubescence short, very dense. Head densely punctate, the longitudinal fron- 

 tal groove feeble ; antennae nearly one-half as long as the body, moderately 

 incrassate toward base. Prothorax slightly wider than long, the apex and 

 base truncate, the former much the wider ; sides broadly, obtusely angulate 

 at the middle ; thence feebly convergent to the apex, more strongly so to the 

 base and almost straight ; disk longitudinally, distinctly impressed in the 

 middle, finely, very densely punctate, extremely densely so laterally and 

 toward base except along a narrow tumid median line. Scutellum shining, 

 finely, rather densely punctate. Elytra two and one-half times as long as 

 wide, about one-fourth wider than the prothorax, the apex obtusely and 

 abruptly rounded. Legs moderate in length, rather densely pubescent. 

 Pygidium triangular, with the apex subtruncate. Length 12.0-14.0 mm. ; 

 width 3.3-3.8 mm. $>. 



Colorado ; New Mexico. 



Represented by three females which agree perfectly among them- 

 selves. Parallelum slightly resembles cinnamopterum, but differs 

 in its larger size, more elongate elytra and in the characters given 

 in the table; it is more southern in habitat than cinnamopterum, 

 which is represented before me by both sexes from Canada and 



