442 WILLIAM T. M. FORBES 



3. Outer part of wing shading to ferruginous brown 4. dulciana. 



1. R 4 and R-, separate; hind wing not white. 



2. Dark basal area complete to costa 1. amatana. 



2. Subcostal region pale to base, cutting off the darker basal area. 



2. delicatana. 



1. G. amatana Heinrich (Kearfott ms.). R and R r , approximate; R 5 to M a 

 markedly curved; M, associated with the notch (unlike Kxentera). Blackish, 

 shaded with whitish, the dorsum beyond the antemedial band tending to show a 

 rounded or broad triangular pale (whitish) patch, suggesting that of Epinotia, timi- 

 della. Speculum of two very broad and dull bars, with a narrow line of the ground 

 between them, often obscure, but normally pale, very often separated from the 

 central patch by a distinct blackish bar. Fringe dark and obscurely barred, the 

 longitudinal line in it usually more distinct. Hind wing dark gray, as in G. bolliana. 

 18 mm. 



Moth locally common on tree trunks, in May and early June. 

 Forest Hilis, Massachusetts, and south. New York: Ithaca, Crosby (Yates 

 County ) . McLean. 



2. G. delicatana Heinrich. Similar to G. amatana. Fore wing with R, and R r , 

 connate. Fore wing narrower, with the powdering more whitish gray, extending 

 along the costal and subcostal region to the base, cutting off the darker basal 

 patch; a tendency to a nearly continuous dark line from apex to upper side of 

 cell, without the subterminal spot or hook of G. amatana. Hind wing paler toward 

 base. 15 mm. 



April and May. 



New Jersey and Pennsylvania. 



3. G. watchungana Kearfott. R 4 and R 5 very shortly stalked; fore wing a little 

 rough scaled. Blackish gray, in some lights shot with brown, especially at apex; 

 irregularly mottled with whitish. Costa with fine irregular oblique striation; 

 inner margin with coarser and rougher oblique streaks and bands; with two 

 strong pale streaks at middle of inner margin, lusing into a vague patch, as a rule; 

 but when distinct, with the outer one decidedly shorter than the more basal. 

 8peculum pale, a mixture of white and dull silver, with some black scales. Apex 

 black, preceded by two strong white striae on costa. Fringe with a broad gray 

 line, breaking up toward anal angle, and cut with white below apex. Hind wing 

 white, shaded with fuscous outwardly and on veins, with pale fringe. 15 mm. 

 (Thiodia). 



May. 



New Jersey to Pennsylvania. 



4. G. dulciana Heinrich. Similar to G. watchungana, with the same contrasting 

 pale speculum ; ground more ferruginous brown, especially on the outer half of 

 wing. Hind wing dark smoky. 14 mm. 



June and July. 



New Jersey and Maryland. 



5. G. deludana Clemens. Tufts more distinct than in the preceding species, much 

 weaker than in G. bolliana, the outer part of Cu 2 with a tuft like the others. 

 Similar to G. bolliana, but with the ground more crisply powdered with white, 

 and the brown areas small and crisply dusted with the yellowish scale-tips; 

 blackish shades not obvious, but black lines strong; antemedial evenly concave 

 up to the cell and then abruptly ending; the dorsal half of the base, when dark- 

 ened, with an even straight upper boundary, not extended by an antemedial spur; 

 black bar in end of cell not as strong as the one just beyond it, connected with 

 the "bird-beak" marking; lower line of the "bird-beak" marking usually firie, 

 and curved parallel to the antemedial line, and reaching down to the anal vein. 

 Hind wing paler than that of bolliana,, whitish at base. 15 mm. 



Mai. Found in similar idaces to G. amalana and the Catastea. 



