OF NORTH AMERICA. 153 



ZYGJININ^. 

 Genus COSMOSOMA. Hubner. 



"Wings mostly hyaline. The subcostal vein of the forcwings is 

 adjacent to the external margin, with two subcosto-marginal nervules, 

 one from the disc arising at a point midway between the origin of the 

 medio-posterior branch and its penultimate, the other exterior to the 

 disc, midway between it and the origin of the post apical nervule. The 

 apical branch beyond its middle sends off the post-apical nervule, and 

 near its tip an apical nervulet to thecosta. Median vein four-branched. 

 Hind wings about half as long as the fore wings ; without costal vein; 

 subcostal bifid from the origin of the discal vein, which is very ob- 

 liquely inclined towards the base of the wing and abruptly curved 

 above the median, where it receives, the discal fold. Median vein 

 bifid exterior to the disc, with the lower branch furcate at the tip. 



"Head moderate, smooth, neck not distinct; with ocelli. Face 

 smooth and vertical. Eyes moderately prominent. Antennae rather 

 more than half as long as the body, pectinated to the tips in the $ , 

 less so in the ? . Palpi rather stout, curved, exceeding the face, 

 smooth, but hairy at the base ; basal and middle joints nearly equal ; 

 terminal small and conical. Tongue equal to the thorax beneath. 



" Body scarcely equal in length to the fore wings, rather slender, 

 nearly linear. Patagia small. Legs moderately stout, smooth ; fore 

 tibiae with a moderate, concealed spur from the base ; hind tibias with 

 four rather small spurs." 



Clemens, Proc. Acad. Nat. Sci. Phil. p. 544. (1S60.) 



But one species of this genus is found in the United States, it being 

 also reported to occur in Mexico. (Clemens. ) 



l.-COSMOSOMA OMPHALE. (PI. 7, fig. 5.; 



Cos7nosof)ia omphale, Hiibner. 



/Egcria omphale, Say, Am. Ent. vol. 2, pi. 19. (1817-28.) 

 Glaucopis (C.) omphale, Harris, Sill. Journal, vol. 36, p. 317. 

 (1839.) 



