528 William T. M. Forbes 



Female variable. Very narrow-winged. Ground normally light yellow, with a 

 more or less distinct brown shade through the middle of the fore wing from the 

 base to the apex 20-28 mm. Hind wing white in all forms; rarely, with black 

 terminal points. 



Typically, the longitudinal shade is moderately developed and diffuse; in 

 variety arbocostellus Fernald, it is defined on the upper side, setting off a clean-cut 

 pale yellow costal stripe from base to apex; in variety dispersellus Robinson, the 

 ground is more or less dusted and suffused with fuscous; variety pallulellus Barnes 

 and McDunnough is immaculate pale yellow; and variety uniformellus Dyar is 

 fuscous, immaculate except for the blackish discal dot. 



June to early August. 



Northern States; Nova Scotia to Virginia. New York: Buffalo, Otto, Ithaca. 



6. S. longirostrellus Clemens. Light straw yellow, more or less dusted and 

 shaded with fuscous. A grayish postmedial dot in the fold; a blackish ante- 

 medial dot in the fold; and discal dot. Hind wing white. Uncus bluntly truncate, 

 somewhat heart-shaped in posterior view, with a small nodule in place of a spine 

 on its ventral side, transatilla bearing a pair of very large circular lobes; penis 

 much more coarsely spinulated than in the rest of the genus, and containing a 

 very heavy spine. Juxta apparently unarmed. Gnathos much modified, without 

 a spine. (Fig. 305). 



Female similar to male, the wings slightly narrower. 



This species is easily distinguished by the blunt uncus in the male, which is 

 almost always visible without dissection, and by broad blunt wings in the 

 female. It is superficially close to the European 8. forficellus, for which it has 

 been commonly mistaken, but shows no resemblance in structure. I cannot tell 

 by the description whether S. amblyptepennis Dyar is the same. 



.June and July. - 



Northern States; Canada (Montreal and perhaps Quebec) to Pennsylvania. 

 New York : Newport, Newcomb, North Creek, Niagara Falls, Otto, Ithaca, Little 

 Falls, Albany, New Windsor. 



Subfamily CHRYSAUGINJE 



Antenna? normally laminate and fasciculate in male, rarely with any special 

 modification. Palpi various, not strikingly dimorphic in the sexes, third seg- 

 ment normal, fully scaled; maxillary palpi completely absent; tongue developed. 

 Ocelli most often present. Fore wing in female with R 3 ^ 5 stalked, typically similar 

 in male, but almost invariably more or less modified sexually; with distorted 

 venation and costal lobes, tufts, etc.; often with a funnel-like structure at base of 

 costa (fig. 306). Male retinaculum often modified into a loop. M, and M 3 free, 

 stalked or united; 1st A completely absent. 3d A primitively forked, the upper 

 branch becoming coincident with 2d A. (In specialized forms 3d A rims up into 

 2d A, and then the lower fork separates again from 2d A as a free spur.) Hind 

 wing with no fringe on base of Cu; Sc and R anastomosing in our species; 1st A 

 completely lost, and frenulum often thickened and modified in male, multiple in 

 female. 



Larvae normally leaf rollers, with uniordinal hooks in two transverse bands, on 

 prolegs; adfrontal sclerites reaching vertex, and front, nearly to vertex; vii repre- 

 sented by a single seta on meso- and metathorax; ninth segment of abdomen 

 with seta i about midway between ii and iii; with three well-separated and well- 

 developed lateral setae. Pupa not fully studied. 



Key to the genera 



1. Hind wing with all eight veins preserved. 

 2. Fore wing with Cu, and Cu, stalked; Mo and M- arising from cell sepa- 

 rately (fig. 308) . 5. Galasa. 



2. Fore wing with M, to Cu ; all arising separately from cell 4. Tosale. 



2. Fore wing with M, and M, stalked. 



