445 



and blended. It is evidently an abnormal effect, rather than indicating 

 even a variety, in the usual sense of that word. 



Larva. — Body very thick and rather short; head small, not so wide as 

 the body. Pale yellowish; head pale reddish; body marked with pale 

 bluish-green irregular slashes. Feeds on Liiiodendron tulipifera. — (Described 

 from Abbot's MS. drawing.) 



GNOPHOS Treitschke. Plate 5, fig. 5. 



" Scotopteryx, Caluscia, Ascotis, Dyscia, aucl Hyposcolis Hiibn., Vcrz., 1818. 

 Gnophos Tieits, Scbm. Eur., vi (i), 160, 1827. 



Dup., Lcii. France, viii (v), 202, 1830. 



Boisd., Gen. 1ml., 199. 1840. 



H.-Sch., Scbm. Eur., iii, 71, 1^47. 

 Charissa and Gnophos Stepb., Cat. Br. Eep., 176, 1850. 

 Gnophos Lederer, Verb. Bot. Zool. Ges. Wien, 178, 185:?. 



Guen., Phal., i, 292, 1857. 



Walk., List Lt-p. Het. Br. Mus., xxi, 459, 1860. 



Head rather narrow in front. Male antennae simple. Palpi rather 

 slender, porrect, extending a little beyond the front. Fore wings broad; 

 costa slightly convex; apex subacute, rectangular; outer edge bent in the 

 middle. Hind wings extending beyond the abdomen, full on the outer edge, 

 which is more or less scalloped. Venation: six subcostal venules ; along, 

 narrow, subcostal cell; median venules much as in Hemerophild. 



This genus differs from Cymatophora in the short, broad, more or less 

 scalloped wings and simple antennae. From Tephrosia, it differs in the 

 simple antennas and larger, broader, shorter wings. From Hemerophila, it 

 may be distinguished by the simple antennae and less scalloped wings. In 

 coloration, the species are dull ash-gray, with an indistinct, regularly -curved, 

 extradiscal line and four discal dots. The markings resemble those of 

 Tephrosia (2 1 . anticaria) more than any other genus, but the species want 

 the distinct dark lines. The single species known from this country occurs 

 in Colorado, none having been found, as yet, east of the great plateau, or 

 plains. It is nearly, but not very closely, allied to the European G. pullata, 

 but is more reddish-ash-colored. 



Gnophos haydenata, .sp. nov. Plate 11, fig. 27. 



2 9. — Uniformly pale reddish-ash-gray; head whitish on the vertex, 

 but the front and palpi are concolorous with the rest of the body and wings. 

 Fore wings with no distinct markings, being dull ash-gray, with no markings 



