WM. G. DIETZ, M.D. 



289 



to Chambers 0. inusitatumella Ch. proves an exception to this rule, 

 as the larva pupates in the mine. The pupal case is projected from 

 the cocoon during the emergence of the imago. The latter in repose, 

 like Gracilaria, Coriscium, sits with the anterior part of tlie body 

 elevated. 



Only two of the European species occur in North America— 0. 

 guttea and anglicella. Of other European species, of which authen- 

 tic specimens had been placed at my disposal by the National Museum, 

 none correspond with species herein described. 



SYNOPTIC TABLE OF SPECIES. 



Forewings with lustrous, white or yellow marginal spots 1- 



Foi'ewings with numerous costal striae, never lustrous 4. 



1. Four or more costal spots ~- 



With two costal spots boreasella. 



2. With entire fascia 3. 



Without such a fascia guttea. 



3. With five costal spots; cilia not tipped with dark brown around apex. 



preciosella. 

 With six costal spots; cilia tipped with dark brown kalmiella. 



4. Cilia around the apex not tipped with blackish scales 5. 



With blackish scales 9- 



5. Third joint of palpi conspicuously banded with dark fuscous 6. 



Third joint of labial palpi at most spotted with fuscous 7. 



6. Larger, dorsal margin of forewing with base and a spot behind the anal angle 



blackish tlnbitella. 



Smaller, without these characters crattegifoliella. 



7. Costal striae equal and equidistant melaiiolella. 



Outer costal strise more strongly marked, conspicuous 8. 



8. With curved dorsal line before the apex conspicuella. 



Without such a line arbitrella. 



9. Third joint of palpi conspicuously banded with dark fuscous 10. 



Third joint of palpi white, or inconspicuously spotted with fuscous 1.5. 



10. Costal cilia not tipped with dark scales before the apex anglicella. 



Without that character 11. 



11. Ground color of entire forewing uniform priinivorelia. 



Subplical space of forewing intermixed with white ... .12. 



12. Plical spots not attaining the dorsal margin...- quadripuiictelia. 



Plical spots large, attaining the dorsal margin 13. 



13. Costal striae of at least moderate length Ticinella. 



Costal striae very short, almost reduced to spots strobiTorella. 



15. Fifth costal stria, from the apex, extends to dorsal margin. 



arbutifbliella. 

 Without such character obliterella. 



TRANS. AM. ENT. SOC. XXXIII. (37) AUGUST. 1907. 



