368 



DYSPTERIS Hubner. Plate 4, fig. G. 



Dyspteria ]|iil>n.. Vera., 286, 1818. 



H.-Sch., Ansserrnr. Scfam., 1854 58, 



Cum., Plial., i, 361, 1857. 



Walk., List Lep.Het. Br. Mus., xxii, 557, 1801. 



Head rather large; front large and prominent, not narrowing anteriorly. 

 Palpi not reaching beyond the front; second join) broad, though very distinct 

 from, and narrower than, the first; third minute, short, conical, not so long 

 as the second joint is wide. Antennae pectinated in the male rather broadly 

 on the basal two-thirds. Fore wings very large; costa much arched ; apex 

 much produced; outer edge very oblique; inner edge but little more than 

 half as long as the outer. Hind wings much aborted, small, regularly trian- 

 gular; outer edge slightly convex; apex subrectangular ; the wings reach as 

 far as the tip of the abdomen. Venation: fore wing* with a large subcostal 

 cell; the second subcostal but little longer than the third; fifth subcostal 

 venule long, thrown off from the subcostal cell. In the hind wings, the costal 

 area'is very broad. 



This peculiar genus differs from all others of the subfamily in the great 

 difference in size between the wings, the anterior pair being very large and 

 the hinder diminutive and triangular in outline, the outer edge being very 

 straight. The species only occur in the New World. 



Dvspteris abort ivaria Herr.-Sch. Plate 10, fig. 75. 



Ihjaph'ris abortivaria H.-Sch., Aufcsereuj'. Scum., 62, tig. 340, 18u4-5S. 

 Guen., Phal., i, 363, 18:>7. 

 Walk., last Lep. Het. Br. Mus., xxii, .">?, 1861. 



3 -i and 2 9. — Pea-green; head and thorax rather darker. Antennas 

 green above on the basal half, white beyond, pectinations testaceous. Palpi 

 green; thorax green above and beneath, except the hind pair of trochantines 

 and coxae, which are concolorous with the pale-yellowish abdomen. Fore 

 wings crossed by two parallel, oblique, white, moderately wide lines, straight, 

 not waved; the inner fading out before reaching the costa, disappearing near 

 the distinct white discal dot; the outer line parallel with the outer edge, 

 slightly bent before reaching the costa; fringe green. Hind wings with 

 a single line, rather broad and diffuse Beneath as above, but with two 

 broad, diffuse lines, one submarginal on the fore wings; discal dots much 



