NORTH AMERICAN EUCOSMINAE. 87 



20. EUCOSMA RAGONOTI ( Walsingham) . 

 (Fig. 202.) 



raedisca ragonoti Walsingham, Trans. Ent. Soc. Lond., 1895, p. 503. 



Eucosma ragonoti Fernald, in Dyar List N. Amer. Lepid., no. 5160, 1903. — Dyae, 



Proc. Ent. Soc. Wasli., vol. 5, 1903, p. 180. — Barnes and McDunnotjgh, 



Cbeck List Lepid. Bor. Amer., no. 6887, 1917. 

 Eucosma ragonoti harnesiana Dyae, Proc. Ent. Soc. Wash., vol. 5, 1903, p. 180. 



Dyar's varietal name falls into the synonomy since it identifies 

 only an aberration. We are limiting such names to distinct local races 

 and food plant varieties and applying them even then rarely and only 

 when there is a distinct necessity for a designation. Were we to 

 begin naming all aberrations and color varieties in this group where 

 species are so subject to variation there would result only a multipli- 

 cation and confusion of names which could serve no useful purpose. 

 In ragonoti the dorsal spots vary greatly, are more often fused than 

 not and when fused make a fascia of variable form. Two specimens 

 from the same locality and taken at the same time frequently show 

 both extremes; that is, with the dorsal spots distinctly separate or 

 completely fused. 



Male genitalia figured from paratype in National Collection. 



Specimens in National Collection, American Museum and collection 

 Barnes from various Colorado localities. 



Alar expanse. — ^20-25 mm. 



Type. — In British Museum. 



Type locality. — ^Loveland, Colorado. 



Food plant. — Unknown. 



21. EUCOSMA SERPENTANA (Walsingham). 

 (Figs. 206, 207.) 



Paedisca serpentana Walsingham, Trans. Ent. Soc, London, 1895, . p. 504. 

 Eucosma serpentana Fernald, in Dyar List, N. Amer. Lepid., no. 5161, 1903. — 

 Dtak, Proc. Ent. Soc. Wash., voL 5, 1903, p. 180'. — Barnes and McDun- 

 NOUGH, Check List Lepid. Bor. Amer., no. 6888, 1917. 



A species easily recognized on pattern. The structural characters, 

 however, like those of many species in this subfamily show rather 

 marked differences in specimens from Pacific coast as compared with 

 those from east of the Sierras. Differences such as those shown in 

 the harpes of the two specimens here figured (figs. 206, 207) would 

 normally indicate two species; but as between specimens from the 

 Pacific coast region and Rocky Mountain or eastern localities they 

 often signify no more than racial differences. 



Male genitalia figured from specimens in National Collection 

 taken at Pullman, Washington (C. Y. Piper) and Mesilla, New 

 Mexico (C. N. Ainslie). 



