Lepidoptera of New York and Neighboring States 269 



streak from beginning of fringe nearly meeting one from inner margin. A large 

 blackish spot in cell and a smaller one before it in fold, both more or less flanked 

 with yellow scales and minute tufts. Second discal dot much smaller, incon- 

 spicuous. Abdomen mottled below. 18 mm. (biminimaculella Chambers). 



Caterpillar on oak. Moth in July. 



Pennsylvania ( ? ) ; Missouri ; Texas. New York : East Aurora, Ithaca. 



25. G. pseudoacaciella Chambers. Dark purplish brown, somewhat powdery, 

 flecked and streaked with ochreous and white; head, antennae and palpi mixed 

 brownish and white. Fore wing with a pale subcostal streak from base to apex, 

 sometimes obscure, a pale spot at beginning of costal fringe and a dorsal one 

 opposite, sometimes joined into an obscure fascia. First three segments of abdomen 

 dorsally with finely toothed contrasting yellow scales. 18 mm. (ccecella Zeller). 



The markings are strongly variable but the species may be distinguished from 

 most Gelechiidas by the yellow base of the abdomen (which occurs more often in 

 Gnorimoschema than Gelechia). Often the costal region is shaded or suffused with 

 brown, and the antemedial oblique bars may be absent. 



Caterpillar on Robinia, often invading mines of other Tineids, especially when 

 young; later between leaflets sewed together. Green with light brown head and 

 cervical shield; abdomen with subdorsal and stigmatal stripes and addorsal and 

 lateral spots; larva, when young, black. Moth in May and June, and August. 



Western Pennsylvania; southern Ohio; Illinois. 



26. G. serotinella Busck. Very similar to G. pseudoacaciella and not always 

 distinguishable in the imago, but usually with the costa practically concolorous, or 

 brown; never whitish; less streaked looking. 16-21 mm. 



Larva on Prunus serotina, in a nest formed of a folded leaf, the caterpillar 

 feeding in a chamber roofed with a heavy sheet of white silk, and living in a black 

 frass tube, much like Catastega. Cocoon within the frass tube. Caterpillar whitish, 

 with brown head and cervical shield, with brown narrow addorsal lines on body, 

 and four broader lines on sides; when young greenish white with black head and 

 cervical shield. 



Moth in July and August. 



District of Columbia; Virginia; Illinois; Missouri; Colorado. 



27. G. fondella Busck. Powdery light fuscous. Antennae annulate black and 

 ochreous; palpus sprinkled with black; head and thorax concolorous; fore wing 

 with each scale darkening to tfp, faintly roseate; two conspicuous black spots 

 trisecting the costa, and converging below, the outer strongly oblique, and covering 

 orbicular as well as reniform. Extreme apex dusted with black, not contrasting. 

 Hind wing light ochreous fuscous. Legs pale, with black bars on outer side. 

 Sometimes with the orbicular and reniform separate from the postmedial bar, but 

 the orbicular always very large and touching the reniform. 13-14 mm. 



June. 



Maryland to western Pennsylvania. 



28. G. pseudofondella Busck. Dull ochreous, slightly dusted with black. Palpi 

 with slight black mottling and bar near tip; head pale; fore wing with black dots 

 on edges at extreme base and dot in fold near base; an outwardly oblique ante- 

 medial fascia from costa to fold; a more diffuse postmedial fascia reaching inner 

 margin and covering the reniform; and a small blackish orbicular spot between 

 them. Apex heavily shaded with blackish. 14 mm. 



June to July. 



Northern New Jersey to North Carolina and Illinois. New York: Ithaca. 



29. G. mediofuscella Clemens. Clay color, dusted in varying proportion with 

 dull black; antenna? annulate with white and blackish; palpi dominantly dark. 

 Fore wing with base dominantly of the ground color, ending at a black oblique 

 fascia from costa to fold, denned on inner side. Outer part mottled and dusted 

 with black, gradually shading into the black fascia; usually without definite 

 markings. 



