134 William T. M. Forbes 



10. DIACHOBISIA Clemens 



{H omosetia Clemens ; Pitys Chambers; Calostinea and Stenoptinea Dietz ; 



P elates Dietz?) 



Similar to the last group of Tinea but with some raised scaling on the fore 

 wings; wings often heavily tufted; or more reduced, the fore wing (fig. 82) being 

 lanceolate and the hind wing sometimes linear, with cell nearly marginal. A of 

 fore wing, in the latter case, not forked at base, and wing-sealing sometimes 

 nearly smooth. Occasionally with metallic markings. Antennae usually smoother 

 than in Tinea, the outer whorl of scales covering nearly the whole of each segment. 

 .The species have not been fully studied and may not all be congeneric. Besides 

 the names listed in the synonymy above, Infurcitinea seems also to be a synonym 

 of this genus, being related to group Calostinea. Some of the species listed below 

 may even belong to the Adelidae. 



Key to the species 



1. With accessory cell; no definite scale-tufts; hind wing broader, with Cu 2 



nearly as long as width of cell, and with anals developed. 



2. Male antennae distinctly pubescent; fore wing not metallic, R 4 and R B 



stalked; costa of hind wing sinuate ( Diachorisia, fig. 82) . ...1. velatella. 



2. Male .antennae smooth-scaled; fore wing with metallic markings; costa of 



hind wing hardly sinuate, R 4 and R 5 free (Calostinea). 



3. A transverse white fascia .2. argentistrigella. 



3. No transverse fascia 3. argentinotella ( ?) . 



1. No accessory cell; Cu of hind wing extremely short, the cell almost touching 

 the margin. 

 2. Both wings with all veins free; antennae long, normal; costa of hind wing 

 sinuate; fore wing with scale-tufts (Homosetia, fig. 80). 

 3. Fore wing dark brown or blackish brown. 

 4. Face white, vertex black. 



5. A large, well-defined silver spot near the base. 



6. No white terminal dots 4. cristatella. 



6. Distinct white terminal dots on costa and outer margin. 



3. argentinotella. 



5. No such spot 5. obscurella. 



4. Head orange 6. chrysoadspersella. 



3. Fore wing suffused with tawny or golden brown. 

 4. White costal spots. 



5. Spots toward the apex of the fore wing, perpendicular to the costa, 



equal to the spaces between them 7. costisignella. 



5. Spots narrow, distinct, and oblique 8. fasciella. 



4. No white costal spots 9. rnaculatella. 



3. Fore wing dominantly grayish fuscous on a white ground, with yellow- 

 ish spots, if there is any yellow. 

 4. Fore wing with golden dots. 



5. Fore wing wider; subcostal tuft of median facia large. 



11. miscecristatella. 



5. Fore wing narrower, the tuft small 10. tricingulatella. 



4. No yellow or golden 14. marginimaculella 



2. Hind wing with Mj and M 2 stalked, front with a conical tuft (Stenoptinea). 



3. Apex of fore wing and fringe buff -brown 13. auriferella. 



3. Apex of fore wing and fringe not pale 12. ornatella. 



