Very elongate, brown, clothed with dense gray pubescence ; 

 head large, horizontal ; antennae about as long as the body ; mandi- 

 bles thick, curved, chisel shaped at tip, apical edge vertical, sharp, 

 straight ; prothorax with dorsal ele\-ations and acute lateral spine ; 

 elytra gradually narrowed, bispinose at tip, bearing two distinct dis- 

 cal costse and a sutural and marginal costa fainter; punctures between 

 large and distinct. The elytral pubescence is partly denuded, leaving 

 a basal blotch and two angulate bands brown. 



DESMOCERINI. 



Four species of Desmoceriis form this tribe, and the following- 

 synopsis has been published by Dr. Horn, Trans. Am. Ent. Soc. ix, 

 1881. 



Elytra with basal half yellow, apex blue, disc faintly tricostate . . palliatus. 

 Elytra either entirely yellow, or margined with yellow, not costate. 



Male elytra orange-yellow, female with discal blue space ; punctuation 



moderately coarse, a little finer near apex auripennis. 



Elytra similarly colored in the sexes, both narrowly margined with yellow 

 at sides and base. 

 Thorax irregularly plicate ; elytra coarsely and deeply punctured from 



base to apex cribripennis. 



Thorax densely punctured, regularly convex ; elytra moderately coarsely 

 punctured at base, more finely and densely at apex . . californicus. 



D. palliatus Forst., Nov. Spec. Ins. 1771, p. 40 ; Lee, J. A. P. ser. 2, i, p. 318; 



Harris, Ins. Mass. p. 92; blaiidus Fab., Syst. Ent. p. 182; cyaneiis 



Fab., Syst. Ent. App. 1775, p. 823 ; elongatiis Bland., Proc. Ent. Soc. 



Phil, i, 1862, p. 269. 



Length 17—23 mm. = .70— .90 inches. Hab.—La.., N. C, N. Y. Ct , Va. Pa. 



D. auripennis Chev., Rev. Zool. 1855, p. 187 ; Ann. Fr. 1858. p. 325, t. 8, f 6. 

 Lengtli 22 mm. = .88 inches ; 'S ? . Habifat.—Ci\\^., Nev. 



D. cribripennis Horn, Trans., Am. Ent. Soc. ix, 1881, p. 7. 



Lengtii 16 mm. '^ , 20 mm. 9 =.64 — .80 inches. Hab. — So. Cala., Wash. 



D. californicus Horn, 1. c. 



Length 12 mm. t, , 18 mm. 9 = .48— .92 inches. Habi la f.—C^W^orma.. 



NECVDALINI. 



This tribe contains four species in two genera, all of considerable 

 size and conspicuous among the Longhorns by the abbreviated elytra, 

 which are scarcely longer than the thorax, dehiscent and separately 

 rounded at tip. They may be separated as follows : 



