184 WILLIAM T. M. FORBES 



7. PARECTOPA Clemens 

 (Gracilaria, Coriscium, in part) 



Similar to Gracilaria; the vestiture of the vertex often raised, but without a 

 definite tuft; middle tibia; with at most a small tuft at apex; hind tibia; smooth- 

 scah'd. Venation of fore wing slightly variable, one or two veins sometimes lost. 

 Hind wing with M 3 lost; M t and M 2 and Cu, and Cu. stalked. Larva, when mature, 

 of the cylindrical type; the northeastern species making a digitate blotch-mine, but 

 some of the primitive species in a cone, like Gracilaria. 



Key to the species 



1. Inner margin white 1. salicifoliella. 



1. Inner margin concolorous, with short, silver fascia;. 



2. A black streak through the white apical fringe; head all concolorous; third 

 and fourth costal and dorsal bars opposite each other, forming broken 



fascia; 5. plantaginisella. 



2. Less black in apical fringe, otherwise marked; face white. 



3. Most of vertex behind antennae light brown, white at edges; ground of fore 



wing paler 4. pennsylvaniella. 



3. The part of head behind antennae with front half white, posterior half 

 blackish, contrasting, ground of fore wing darker. 



2. robiniella, 3. lespedezcefoliella. 



I. Hind wing with traces of M 3 preserved; fore wing with R! arising from new 



base of cell; R 5 and Mj stalked, and all veins preserved. (Micrurapteryx 

 Spuler). 



1. P. salicifoliella Chambers. Apical fringe caudate, but with the tuft not con- 

 trastingly colored. Head and thorax white, with some gray scaling on head, 

 especially on the two fanlike tufts over the bases of the antennae; palpi with 

 second joint mostly blackish; third joint with black rings at base, middle, and 

 apex; maxillary palpi blackish. Legs black and white barred. Tegulae and fore 

 wing dull dark fuscous, lighter toward the margins. Two strongly oblique, white 

 streaks at middle of costa, and three short, strongly convergent ones toward apex. 

 Apex black, with a blackish bar around it in the fringe. Inner margin with a 

 somewhat irregular white fascia, edged above with black, and sometimes con- 

 taining a black bar near its upper edge, two-thirds way out, and scattered black 

 scales. 10 mm. 



The species occurs in the latter half of the year, apparently breeding continu- 

 ously. The larva is a blotch-miner on willow, sometimes eating out the entire 

 leaf, and is usually confined to a single mine. The pupal stage is passed under 

 a silken carpet, on a leaf, and lasts two weeks. 



Kentucky; southern Ohio; Missouri. 



II. Hind wing icith M 3 lost; fore wing with R t arising a third way out on cell; 



Mj free and one or two dorsal veins lost. (Parectopa.) 



2. P. robiniella Clemens. Dark brown, somewhat shining, but less so than penn- 

 sylvaniella. Head white, occiput black, the black area covering the whole width 

 of the head. Palpi blackish, third segment white; antennae with scape white, 

 with a fine black line in front, shaft blackish, and feebly annulate. Legs banded, 

 black and white. Fore wings with three white fasciae strongly outwardly oblique 

 from costa toward middle, the first one shorter; an antemedial, white, dorsal 

 spot or fascia, not always reaching inner margin and nearer the base than the 

 first costal; a short oblique fascia before the second costal, and one nearly opposite 



