NORTH AMERICAN LASPEYRESIINAE AND OLETHREUTINAE 181 



Sericoris Mpartitana Davis, Bull. Micliigan Agr. Sta., no. 102, 1893, p. 30. 

 Olethreutes Mpartitana Feknald, in Dyar List N. Amer. Lepid., no. 5071, 



1903. — Forbes, Memoir 68, Cornell Univ. Agr. Exp. Sta. 1924, p. 451. 

 Olethreutes similisana Feknald, in Dyar List N. Amer. Lepid., no. 5072, 



1903. 

 Olethreutes dilutifuscana Keahfott (not Walsingham ) , Can. Ent., vol. 



37, 1905, p. 208. 

 Argyroploce Mpartitana Baknes and McDunnough, Check List Lepid. 



Bor. Amer., no. 6869, 1917. 

 Argyroploce similisana Babnes and McDunnough, Check List Lepid, Bor. 



Amer., no. 6870, 1917. 



Walsingham referred similisana Walker to the synonymy in 1879 ; 

 but in this was not followed by our cataloguers, w^hy I do not know 

 as there does not seem to be any reason for doubting the correctness 

 of his reference. From the description and figure dilutifuscana 

 Walsingham also appears to be a synonym or variety of hipartitana. 

 Zeller's caesialhana is certainly equal, as Fernald had it, to hipa7'ti- 

 tano,. There are cotypes of the former in the National Collection 

 Avhich agree in every detail with Clemens' type in Philadelphia. 

 In general appearance hipartitana Clemens and glaciana Moschler 

 are very similar and easily confused. Both species are variable in 

 the extent and intensity of the dark markings in the postmedian area 

 of the fore wing. The characters given in the key will help to dis- 

 tinguish most specimens ; but the only sure way to separate the two 

 is by their genitalia which are quite different. 



Male and female genitalia figured from specimens in National 

 Collection from East River, Conn. (C. R. Ely, July 13, 1907, male), 

 and Sebec Lake, Me. (June, female). 



Bursa of female with signum a scobinate patch. 



Distnhution. — Maine, New Hampshire. Vermont, Massachusetts, 

 Connecticut, New York, New Jersey, Pennsylvania, Montana, Nova 

 Scotia, Quebec, Ontario, Manitoba, Saskatchewan, Alberta, Alaska. 



Alar expanse. — 15.5-20 mm. 



Types. — In Academy Natural Science, Philadelphia [hipartitana) ; 

 British Museum {similisana) ; Museum Comparative Zoology {cae- 

 sialhana). 



Type localities. — Massachusetts {hipartitana., caesialhana) : St. 

 Martins Falls, Albany River, Hudsons Bay {similisana). 



Food plant. — Celery. 



19. OLETHREUTES DILUTIFUSCANA (Walsingham) 



Sericoris dilutifuscana Walsingham, Illus. Lepid. Heter. Brit. Mus., vol. 4, 



1879, p. 33. 

 Olethreutes dilutifuscana Fernald, in Dyar List N. Amer. Lepid., no. 5070, 



1903 ; not Kearfott, Can. Ent., vol. 37. 1905, p. 208. 

 Argyroploce dilutifuscana Barnes and McDunnough, Check List Lepid. 



Bor. Amer., no. 6868, 1917. 



