2 BULLETIN 123, UNITED STATES NATIONAL MUSEUM. 



proper and is in reality only a division of labor preparatory to a 

 monograph of the entire North American Microlepidoptera on which 

 he and I are now engaged. Inasmuch as the latter work will deal 

 fully with each species, it has been deemed advisable to confine the 

 present paper within the limits of a mere revision, omitting descrip- 

 tions of already named species, except in so far as these are covered 

 by specific keys and photographs of the male genitalia. Only the 

 more important references are cited, and for those species common 

 to both Europe and North America purely European synonomy has 

 been omitted. The accepted North American synonomy has in each 

 case been reexamined and corrected or verified by comparison with 

 types or other authentic specimens. In a few instances where this 

 could not be done (for example, some of the Walker species whose 

 types are in the British Museum) the fact has been noted in the text 

 and the synonomy of older authors followed. Citations to the Dyar 

 catalogue (Catalogue of North American Lepidoptera, 1903) refer to 

 the United States National Museum Bulletin No. 52. 



Twenty-six genera are recognized as belonging to the subfamily. 

 Of these, nine are described as new. It is unfortunate that additional 

 generic names had to be made, as the sj^nonomy is already heavily 

 burdened, but I have only done so where no older names could be 

 applied. The generic synonomy itself is not complete, as only those 

 genera are treated of which the genitalia of the genotype could be 

 studied. Three hundred and eighty-two species and twenty-nine 

 varieties are recognized. Of these, sixty-nine species and nine vari- 

 eties are described as new. Six species which I have been unable to 

 recognize or place properly from the published descriptions, with 

 three others which must be referred to other groups, are briefly 

 treated at the end of the paper. 



HISTORICAL REVIEW. 



Until recently the Heinemann system has been the base of classifi- 

 cation in the Tortricidae, and while nearly all workers felt it to be 

 unsatisfactory there has been no radical departure until 1915, when 

 Walsingham and Durrant^, largely at the suggestion of Busck, threw 

 out all genera based on secondary sexual characters, placing under 

 the genus Eucosma alone some twenty-seven as synonyms. The list 

 is not complete, for the authors made no attempt to place those genera 

 whose genotypes were not before them at the time. Their genus 

 Eucosma corresponds roughly — this is, with the inclusion of a few 

 generic groups that they still tentatively retained such as Ancylis, 

 Rhyacionia {Evetria Authors not Hiibner), Hendecaneura — to the 

 subfamily Eucosminae as here defined. Meyrick in 1910 in his classi- 



» Biol. Cent. Amer. Lepid. Heter., toI. 4. 



