NATURAL SCIENCES OF PHILADELPHIA. 9 



inner margin. Hind wings dark gray ; cilia rather dark ochreous. Abdomen 

 dark brown and ochreous mixed. 



Cosmiotes. 



Fore wings rather narrowly ovate-lanceolate, with the discoidal cell closed 

 acutely. The sub-costal nervure is attenuated toward base of the wing, and 

 subdivides into three marginal branches, the first of which arises at about 

 its middle, and sends from the angle of the disk a trijid branch, which is 

 either forked on the costa by an exceeding short branch before the tip, and 

 gives rise at about its middle to a branch to the inner margin, or is trifid at 

 its extreme tip. The median is two or three-branched near its end. The 

 sub-median is simple. Hind wings are without a discoidal cell ; and the 

 costal nervure is moderately long. The sub-costal runs through the^ mid- 

 dle of the wing, (is central), and is furcate near the tip. The median is 

 well indicated, with two or three short, approximated branches about the mid- 

 dle of the inner margin. 



Size very small. Head smooth. Without ocelli. Forehead rather elevated 

 and rounded ; face rounded, and nearly equally broad. Eyes very small, 

 oval, and somewhat sunken, scarcely visible in front. Labial palpi- mode- 

 rately long and slender, smooth, pointed, and somewhat recurved ; the second 

 joint slightly compressed laterally. No maxillary palpi. Antennae inserted 

 laterally ; basal joint short and rather thick, with a few cilia at the base be- 

 fore ; stalk simple, slender, and scarcely as long as the body. Tongue naked, 

 and about as long as the labial palpi. 



Median vein of hind ivings two-branched. Apical vein trifid at the tip. 



C. illectella. Labial palpi and head yellowish brown. Anteunse fus- 

 cous. Fore wings fuscous, dusted with dark brown, with a broad, transverse 

 silvery white band near the middle of the wing, a spot of the same hue on 

 the costa near the tip, and an opposite one on the inner margin, nearly join- 

 ing it in the middle of the wing. The extreme apex of the wing has a silvery 

 streak in the cilia, margined behind with a row of dark brown atoms on their 

 ends. Hind wings grayish fuscous ; cilia the same. 



Median vein of hind icing three-branched. Apical vein forked on the costa, 

 with a nervulet to the inner margin. 



C. maculoscella. Labial palpi dull yellowish. Head dark brownish. 

 Antenna? fuscous. Fore wings shining silvery grayish, suffused with dark 

 golden brown, with a rather obscure silvery band in the middle of the wing 

 and a silvery spot on the costa just before the tip. The extreme apical por- 

 tion of the wing is blackish brown ; cilia grayish brown. Hind wings grayish, 

 dusted with dark brown ; cilia grayish brown. 



Medio-posterior and central veins opposite the space between the second and 

 third sub-costo marginals. 



C. madarella . Head dark silvery gray. Antennae dark brown, yellow- 

 ish white at the tips. Fore wings dark golden brown, silvery gray at the 

 base, with an oblique, pale golden band near the middle of the wing, the 

 costal portion being nearest the base. On the costa, near the tip, is a pale 

 golden spot, with a spot of the same hue opposite on the inner margin, and 

 one in the middle of the wing before the tip ; cilia pale brown, dotted with 

 dark brown. Hind wings grayish brown ; cilia rather darker. 



Cosmoptekyx ? Hiibner. 



The anterior wings are rather narrow, and slenderly caudate. The discoidal 

 cell is elongate and very narrow, and closed acutely behind with three sub- 

 costo-marginal nervules, the first arising about the middle of the wing. The 

 median sendsybwr nervules to the inner margin, the first arising midway be- 



1860.] 



