272 WILLIAM T. M. FORBES 



G. pullifimbrieUa Clemens. Proc. Ent. Soc., Philadelphia, vol. 2, p. 120. 1864. 



Pennsylvania ? 

 O. punctiferella Clemens. Proc. Ent. Soc., Philadelphia, vol. 2, p. 119. 1864. 



Pennsylvania ? 



G. rileyella Chambers. Canad. Ent., vol. 4, p. 106, 147. 1872. Kentucky. 

 G. s-implid-ella Chambers. Cincinnati Quart. Journ. Sci., vol. 2, p. 238. 1875. 



Kentucky. 



G. suffusella Chambers. Canad. Ent., vol. 4, p. 171. 1872. Kentucky. 

 G. thoraceochrella Chambers. Canad. Ent., vol. 4, p. 169. 1872. Kentucky. 

 G. unistrigella Chambers. Canad. Ent., vol. 5, p. 176. 1873. Kentucky. 

 G. versicolorella Chambers. Canad. Ent., vol. 4, p. 127, 147. 1872. Kentucky. 



3. GNORIMOSCHEMAKnsok 

 (Lita; Gelechia, in part) 



Closely similar to Gelechia. Third joint of palpus thickened with rough scales 

 except at extreme tip; second joint with distinct divided brush, variable in size. 

 Fore wing as in Gelechia, a considerable proportion of the scales usually finely tipped 

 with white. Hind wing (figs. 159, 160) with acute subfalcate apex, long-drawn-out 

 in the smaller species. R and Mj well separated at base, more than half as far 

 apart as at margin, but divergent. No hair pencil. 



This is a medium-sized genus, composed of two well-distinguished groups. In 

 the large typical forms the hind wing is only subfalcate and is broader than its 

 fringe; their larvae are gall-makers in various Composites, cutting an exit hole just 

 before pupation and pupating in the gall. The smaller group have narrow, long- 

 drawn-out hind wings, with a fringe broader than the membrane. The biology of 

 this group is none too well known, but a couple of species, at least, feed on Solan- 

 acese like the Phthorimceas. Only members of the second group are known in 

 Europe, where they are not generally separated from Lita. The species run very 

 close, and the key will not be wholly trustworthy. 



Key to the species 



1. Scales practically all dark -tipped. 



2. Fore wing almost evenly black, with a few scattered, white-tipped scales and 



a considerable showing of white scale-bases 8. busckiella. 



2. Fore wing powdery fuscous gray, without black .... 1. detersella. 



1. A considerable proportion of scales with fine white tips (most prevalent in the 

 moderately light, grayer parts of the fore wing; practically confined to the 

 postmedial line and fringe in G. 'banksiella,) . 

 2. Fore wing with inner fourth distinctly paler than costal fourth. 



3. Head and palpi whitish (except outer half of third segment of palpus). 



4. Fore wing deep, rich, rusty brown 2. gallcediplopappi. 



4. Fore wing light ochreous 3. pallidochrella. 



4. Fore wing largely whitish, with a dark streak on fold . . 4. gallceasteriella. 

 3. Head and palpi rather dark powdery gray, about like the gray parts of 



the wings 5. gallcesolidaginis. 6. saUnaris. 



2. Costal and dorsal parts concolorous; mostly smaller species. 



3. Fore wing heavily streaked with clay-color, leaving a broad, longitudinal 



dark streak from base to apex 11. henshairiella. 



3. No dark longitudinal streak. 



4. Fore wing with three ocellate, brown, dark-centered discal spots. 



10. triocellella. 

 4. With obscure ocellate spots or none. 



