1864.] 287 



the eyes, and the mouth, pale yellowish ; autennre two-thirds the length 

 of the body, black above, tinged with piceous beneath. Thorax : meso- 

 thorax flat, feebly punctured, polished, dull rufous, blackish in front; 

 pectus stained with blackish ; the tegulae and a sutural line before the 

 wings, pale yellowish-white ; pleura pale fulvous ; scutellum flat, pol- 

 ished, dull rufous margined with whitish; postscutellum black with a 

 transverse white spot on its middle just beneath the scutellum ; meta- 

 thorax smooth and polished, black, its extreme sides pale fulvous, the 

 elevated lines indistinct, the central area large, elongate-subquadrate. 

 Wings hyaline, iridescent; nervures and stigma black. Legs pale ful- 

 vous, the anterior coxae beneath, all the femora at tips, and most of the 

 tibife and tarsi, white; posterior tibiae black at base and apex, as well 

 as the apex of all the tarsi. Abdomen cylindrical, scarcely narrowed 

 at base, black, highly polished, its extreme apex with a somewhat ob- 

 scure whitish spot. Length 22- lines; expanse of wings -i lines. 

 Hab. — Xew Jersey. E. T. Cresson. 



7. Exochus pallipes. u. sp. 

 Black ; face, scutellum, pleura and legs, pale yellowish ; wings hyaline. 



Male. — Black, somewhat shining, thinly clothed with a fine, short, 

 whitish pubescence ; face and frontal orbits broad above and beneath 

 the eyes, pale yellowish ; autennfe two-thirds the length of the body, 

 blackish above, rufo-piceous beneath. Thorax : mesothorax black ; 

 tegulae, pectus and pleura, pale yellowish, the latter slightly stained 

 with pale rufous ; scutellum dull rufous, its tip pale yellowish, postscu- 

 tellum with a yellowish transverse spot on its middle ; metathorax 

 black, its extreme sides yellowish-red, the elevated lines not well de- 

 fined, the central area large, elongate, irregular. Wings hyaline ; ner- 

 vures and stigma black. Legs pale yellowish-white, the posterior femora 

 slightly stained with pale fulvous; apex of their tibij^ and tips of the 

 tarsi, blackish. Abdomen black, shining, slightly narrowed at base ; 

 beneath, stained with pale yellowish. Length 22- lines; expanse of 

 wings 4 lines. 



Hah. — Illinois. Dr. Samuel Lewis. 



Genus TROGXTS, Grav. 

 Trogus flavipennis, n. sp. 



Black: head, autenuse, legs, scutellum and base of abdoi-nen, yellowish-fer- 

 ruginous; rest of abdomen yellow; wings yellow, apical margins fuliginous. 

 Head yellowish-ferruginous, tlie frontal orbits tinged with yellowish ; 



