260 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



Trichiosomites obliviosus, sp. nov. 



Length 9 mm. Body broad and stout, the width of the abdomen being 3 mm. 

 Color apparently black, with more or less brownish on the abdomen. Wings 

 hyaline, the veins dark. Head rounded on the sides, its surface finely shagreeued ; 

 mesonotum more coarsely so or finely punctulate. Scutellum smooth. Metauo- 

 tum more or less rugose. All of the abdominal segments are of nearly equal 

 length, the fifth widest, one and one-half times as wide as the first. Abdomen 

 in outline regularly oval. Marginal cell in front wings very long and narrow, 

 pointed, but not at all appeudiculate, divided by a cross-vein at its basal third. 



FIG. 1. Trichiosomites obliviosus Brues. Fore-wing. 



Humeral area divided by a cross-vein near the origin of the basal vein; sub- 

 median cell longer than the median by one-third the length of the transverse 

 median nervure. Basal vein and first recurrent nervure almost parallel. First 

 and second submarginal cells not separated, the second recurrent nervure intersti- 

 tial with the second transverse cubitus. Anal cell as in Pachyprotasis, divided 

 into two by the fusion of the anterior and posterior nervures ; the petiole thus 

 formed as long as the distance from the fusion to the transverse median nervure. 

 Type. No. 2036, Mus. Comp. Zool., Florissant, Col. (No. 1381, S. H. 

 Scudder Coll.). 



Phenacoperga COCKERELL. 



The type species and only one so far made known is P. coloradensis Ckll., from 

 Florissant. It was first described in the genus Perga (Cockerell, : 07 a ), but later 

 made the type of Phenacoperga by its author ( :08) . 



Lophyrus LATREILLE. 



Brischke ('86) records the occurrence of Lophyrus in Prussian amber, but the 

 genus has not been found fossil elsewhere. 



Hemichroa STEPHENS. 



A single species, H. eophila Ckll., has been described from Florissant by Pro- 

 fessor Cockerell ( : 06), who refers it to this genus without any doubt. There are 

 no specimens in the collections which I have seen. 



