18 [January 



Genus EXOCHUS. Grav. 

 Exochus validus. n. sp. 



Reddish-brown, varied with yellow; wings yellowish-hyaline, areolet want- 

 ing; abdomen subsessile. with three yellow bands. 



Male. — Head yellow, the occiput reddish-brown ; antennae two-thirds 

 the length of the body, pale honey-yellow, slightly blackish at extreme 

 tips. Thorax flattened above, clothed with a thin, short, pale pube- 

 scence; mesothorax yellowish, with a broad black stripe down the mid- 

 dle and a narrow abbreviated one on each side; the broad upper margins 

 of the pectus bordering on the mesothorax, two large tubercles in front 

 of the anterior coxa?, and the tegulae, yellow; on each side of the pleura, 

 immediately beneath the fore-wings, there is a large prominent yellow 

 swelling; scutelluni and post-scutellum, as well as the space on each 

 side more obscurely, yellow ; metathorax yellow, with a blackish im- 

 pressed line down the middle. Wings ample, yellowish-hyaline, with a 

 slight cloud at the tip of the marginal cell ; nervures and stigma pale 

 ferruginous ; areolet wanting. Legs yellow, the four anterior femora 

 honey-yellow, the posterior pair reddish-brown. Abdomen subsessile. 

 subclavate, shining, reddish-brown, with a rather broad yellowish band 

 across the tip of the three basal segments above, that on the second 

 and third occupying their apical half. Length \\ lines; expanse of 

 wings 9 lines. 



Collection. — Ent. Soc. Philad. Two % specimens. 



Genus TROGTJS. Grav. 

 Trogus thoracicus. n. sp. 



Yellowish-ferruginous ; three broad lines on the mesothorax and a large stain 

 on each side of the pleura, blackish; wings yellowish-hyaline, glossy: abdomen 

 depressed. 



Male. — Yellowish-ferruginous, rather densely punctured, clothed with 

 a short pale pubescence; orbits of the eyes obscure whitish, and just 

 beneath the antennas the face has a brownish spot; antennae more than 

 half the length of the body, pale ferruginous. Thorax shining; meso- 

 thorax with two dorsal grooves converging on the scutelluni, between 

 the grooves a broad longitudinal blackish stripe, pointed behind and 

 not reaching the scutellum, on each side over the base of the wings 

 another broad blackish stripe which extends to the posterior margin ; 

 middle of the pectus, a large irregular stain on the pleura, the surface 

 beneath between the four anterior legs, and a spot on the extreme an- 

 terior lateral corner of the metathorax, blackish ; scutellum obtusely 

 elevated, shining; metathorax prominent, transverse, convex at the 

 base, immediately beneath the scutellum there is a blackish transverse 

 incisure. Wings yellowish-hyaline, the extreme apical margins dusky; 



