Lepidoptera of New York and Neighboring States 151 



2. PROLEUCOPTERA Busck 

 (Leucoptera; Cemiostoma, in part) 



Face smooth; vertex with a small fine tuft; antennae four-fifths as long as 

 fore wing; eye -cap good-sized, rounded, with regularly imbricated scaling, less 

 perfect than in Opostega. Palpi small, drooping; tongue weak but distinct. Fore 

 wing broad, with lanceolate, caudate membrane, with 10 veins, all separate, 

 2d A forked at base, M 3 and Ri absent; hind wing narrow, without cell, with 

 M 3 and CUj absent; fringe four times as wide as membrane. 



This genus is very closely related to Leucoptera (Cemiostoma) but is slightly 

 more primitive. 



1. P. smilaciella Busck. Similar to 0. albella; larger; first fascia much nar- 

 rower, three times as long as wide, strongly oblique, and starting nearer the 

 base; the second fascia a mixture of yellow and white, ending outwardly in four 

 dark lines that converge on the apex; lead-colored spot smaller than in C. albella, 

 and completely surrounded before and above with the yellow band. 



The moth has been obtained from June to September. The mine is a large, 

 dirty upper-side blotch on Smilax, beginning as a line. The cocoon is formed on 

 the leaf, under two bands of silk. 



Maryland; District of Columbia; southern Ohio; Pennsylvania. 



3. LEUCOPTERA Hiibner 



(Cemiostoma Zeller) 



Head smooth, with the usual large, vertical scales on occiput only. Eye-cap 

 well developed, apparently continuous with the head vestiture, when closed com- 

 pletely covering eyes; mouth parts obsolete. Hind tibiae with bristly hair; fore 

 wing oblong-lanceolate, caudate; R x weak or absent. Only three veins running 

 from cell to hind margin, M 1+2 , M 3 +Cu!, and Cu 2 ; hind wing linear-lanceolate. 



In the American species (subgenus Paraleucoptera Heinrich,) R 2 and R 3 are 

 stalked, R 5 stalked with M, but very short, and 2d A is forked at the base in the 

 fore wing; the hind wing has only one medial. Typically, R 3 and R B are lost, and 

 2d A is simple, but there are two medials in the hind jving. 



1. L. albella Chambers. Sometimes with a few hairs to represent vertical tuft. 

 Snow white; antennae pale fuscous with white eye-cap and apex; fore wing with 

 a nearly square golden fascia from costa beyond middle, pointing toward anal 

 angle; a larger spot on costa beyond it, reaching apex, sometimes broken into 

 fasciae, both of which are edged with brown; and a silvery gray spot near anal 

 angle, preceded and followed with black spots; with a yellow line before it, pre- 

 ceded by fuscous-tipped scales. Fringe fuscous at apex and anal angle, paler 

 between. 6 mm. 



Larva flat, lobed at sides, with pro- and mesothorax widest, then a couple of 

 relatively narrow segments, and abdomen wider again, with minute but normal 

 legs. 



It lives, often socially, in a very dirty frass-filled mine, on poplar and willow. 

 The cocoon is like that of P. smilaciella. 



Kentucky; Colorado and west. 



