ISOSTOLA.—GNOPH.ALA. 115 
for including it is Boisduval’s. I have compared the type with a fine series of speci- 
mens in my own collection, and find that it is in every respect similar to examples 
from Ecuador 
ISOSTOLA. 
Isostola, Felder, Reise Nov. Lep. iv. t. 103. f. 15. 
This genus was founded by Dr. Felder for the reception of an insect (I. rhodobroncha) 
discovered by Mr. Bates on the Amazons. 
1. Isostola superba, sp.n. (Tab. XII. fig. 5.) 
Primaries and secondaries deep black with a brilliant dark blue gloss, the base of the former pale blue; a central 
whitish-hyaline band from the base to beyond the middle of the primaries, and a transverse band of the 
same colour beyond and nearer the apex; secondaries with a central hyaline streak, the inner margin 
also hyaline: head, thorax, and abdomen bright glossy blue; the abdomen with a narrow central white 
line; on the underside the abdomen is quite white ; antenne black, rather deeply pectinated ; legs black 
on the upper side, white beneath. Expanse 13 inch. 
Hab. Guatumata, Teleman in the Polochic valley (Champion). 
Of this beautiful species Mr. Champion only obtained two examples, both of which 
are in the finest condition; it is allied to 7. rhodobroncha, Feld., but is easily distin- 
guished from that species by its more elegant form and more hyaline markings. 
GNOPHALA. 
Gnophela, Walker, Cat. ii. p. 330; Stretch, Illust. of the Zygenide and Bombycide of North 
America, p. 35 (1872-73). 
This genus was founded by the late Mr. Walker for the reception of a species said 
to come from South America; this locality appears to me to be very doubtful. The 
known species are all from North America and Mexico, one only having been recorded 
from as far south as Nicaragua. Gnophela has been placed in the Zygenide by several 
authors, but it appears to me to be much more nearly related to Pericopis; I have 
therefore ventured to place it near that genus. 
1. Gnophela zquinoctialis. 
Dioptis equinoctialis, Walk. Cat. ii. p. 831°. 
Gnophela equinoctialis, Boisd. Lép. Guat. p. 87”. 
Hab. Mexico, Milpas 5900 feet (Forrer), Esperanza, Jalapa (Hége); Nicaragua 2.— 
? Soura America 1, Venezuela 2. 
This species appears to be pretty common in Mexico ; the long series of specimens 
before me all agree well with Walker’s type in the British Museum ; the females are 
considerably larger than the males, in this respect differing from the other known 
species. 
pp 2 
