LEPIDOPTERA OF NEW YORK AND NEIGHBORING STATES 331 



paler, sometimes obscure stripe through the middle to outer margin and apex, with 

 the blackish discal dot on its upper edge, and a larger black spot on its lower 

 edge at two-fifths way from base to apex. 10 mm. 



Caterpillar inquiline in willow galls, especially the saw-fly gall on the leaves. 

 White with a broad transverse black hand on the front edge of each segment, the 

 first band placed on the mesothorax. and interrupted in middle; eighth segment 

 of abdomen with a band 011 posterior edge also. Head yellowish, venter pale; 

 immaculate; legs normal. Hibernation as larva; imago emerging in May. The 

 larva apparently destroys the maker of the gall. 



Generally distributed; a paler race (striolala Zeller ) in Texas. Xew York: 

 Larva: at Ithaca. 



4. B. praeangusta Haworth. Lnteous; head, body, palpi, and fore wings heavily 

 dusted with blackish: not forming a distinct pattern, hut distinctly darker on 

 inner half of basal half of fore wing. Typically with scattered spots of plain 

 luteous, which are obsolete in our race. 



June. Larva (Europe) white, with ocellate brown spots on sides, and a white- 

 marbled brown subdorsal band: dark brown head and black cervical shield; in the 

 catkins and between leaves of poplar. 



Western Pennsylvania. 



IV. fore iriny rery narrow eloiigate-la-iiceolate ; M, free from R.-,. 



"). B. concors Meyrick. Head, with palpi, and abdomen whitish ochreoiis, 

 antenna 1 and thorax somewhat darker; with teguhp tinged with reddish. Fore 

 wing pale ochreous, suffused and sprinkled with fuscous, the third fourth of the 

 costa reddish brown, and apical part paler, more or less tinged with reddish; costal 

 fringe with three dark basal dots, apical fringe with a dark basal line and a dark 

 shade outwardly. Hind wing pale gray; fringe yellower. 10 mm. (Unknown to 

 me.) 



July. 



Parry Sound, Ontario. 



14. COSMOPTERTX Hiibner 



Antennae practically as long as fore wing, more slender than in the other species, 

 and quite smoothly scaled toward base. Scape as long as entire width of head, 

 and only a sixth as thick; without pecten ; palpi as long as head and thorax, 

 turned laterally, smooth, and very slender. Hind tibiae with very little loose 

 hair. Fore wing subfalcate (fig. 185) with apex of membrane produced, almost 

 linear ; with a silver streak in the apical fringe. M t long-stalked with R 4+3 , and 

 usually M._, also, lower discocellular, and m-cu strongly oblique; Cu 2 long and 

 longitudinal. Hind wing 'linear, with more or less rudimentary veins; R running 

 to apex, long-stalked with M,; the cell open below them; fringe five times as wide 

 as membrane, or more. 



Larva with strongly flattened head but otherwise fairly normal; forming a 

 blotch mine with a hole in it through which the frass is ejected. 



C. delicatella and ferualdella belong to the subgenus Lienigia Spuler, with eyes 

 larger and rounded, front less prominent, scape and palpi rather shorter, spurs 

 of hind tibia rather above than below its middle, and larva not always ejecting 

 its excrement. The larva- are to be sought in rush-like marsh plants. 



Key to the species 



1. Fore wing with fine longitudinal white lines toward base. 



2. Lines short, centering at one- fourth the length of the wing; ground dark 



brown . 

 3. Inner margin verv narrowly white toward base. 



