160 BULLETIN 123, UNITED STATES NATIONAL MUSEUM. 



11. SONIA, new genus. 



(Figs. 22, 291.) 



Genotype — Paedisca Gonstrictana Zeller. 



Fore wing smooth; termen markedly concave between 3 and 6; 

 11 veins; 7 and 8 united; 10 much nearer to 9 than to 11; 11 from 

 well before middle of cell ; upper internal vein of cell from between 

 10 and 11; 3, 4, and 5 approximate at termen; 2 straight; costal fold 

 present in male. 



Hind wing with 8 veins; 6 and 7 approximate at base, often 

 anastamosing beyond cell ; 3 and 4 stalked. 



Male genitalia as in Eucosma except : 



Rudimentary clasper present on harpe (as in EpibleTna) ; socii 

 short, rather broad in proportion to length (but not broadly trian- 

 gular) . 



A derivative of Epihlema. 



KEr TO THE SPECIES OF 'SONIA. 



1. Fore wing chocolate browu witli gray or grayish white markings ; hind wing 



brown with dark cilia (1) constrictana. 



Fore wing ochreous with ochreous fuscous, or white with dark grayish 

 fuscous markings ; hind wing smoky fuscous with pale cilia 2 



2. Paler areas of fore wing white (2) vovana. 



Paler areas of fore wing ochreous (3)filiaiia. 



1. SONIA CONSTRICTANA (Zeller). 



(Figs. 22, 291.) 



Paedisca (?) constrictana Zeulee, Vehr. Zool. hot. Ges. Wien, vol. 25, 1875, p. 

 305.— Walsingham, Trans. Ent. Soc. Lond., 1884, p. 140'. 



EuGosnia constrictana Fernald, in Dyar List N. Amer. Lepid., no. 5125, 1903. — 

 Keakfott, Proc. U. S. Nat. Mus., vol. 28, 1905, p. 359. — Barnes and Mc- 

 DuNNouGH, Check List Lepid. Bor. Amer., no. 6971, 1917. 



There is considerable variation in this species both in color and 

 genitalia structure, the- head varying from dull dark fuscous to 

 pinkish, the paler areas of fore wing from pale grayish fuscous to 

 almost white. There is also considerable difference in the shape of 

 the cucuUus of the harpe in different specimens. The differences 

 do not seem constant enough, however, to enable specific or even 

 distinct racial separation. 



In the hind wing veins 6 and 7 are normally closely approximate 

 toward base, but some specimens show a slight anastomosing beyond 

 the cell, and in a few the veins appear to be truly stalked. These 

 venational differences do not correspond with differences in either 

 genitalia or color. 



Zeller's species has been sometimes confused with Epihlema otio- 

 sana Clemens and more often with Epinotia perplexana Fernald. 

 There is no occasion for this, as its fore wing venation readily sepa- 



