196 THE CANADIAN ENTOMOLOGIST. 



black reniform mark on the disc as in a?i/iii. The mesial black band is 

 subcontinuous and proportionately broader in Westcottii. Above the 

 markings of fore wings are very similar in the two species ; the tone is a 

 little darker in Westcottii. The female expands 50, the male 43 mil. I 

 have the male from Illinois, Mr. Bean, number 577; the female from 

 Wisconsin, Mr. O. S. Westcott, for whom I name the species. 



DESCRIPTION OF TWO NEW CALIFORNIAN BUTTERFLIES. 



BY THEODORE L. MEAD, NEW YORK. 



Chionobas Ivallda, n. sp. 



Male — Expanse 1 A to 2 h inches, average 2 fa inches. Upper side 

 of primaries fuscous, with velvety discal bar and a submarginal row of 

 gray-ochraceous spots between the nervures. These spots are usually six 

 in number, situated in the consecutive interspaces between the nervules, 

 beginning with the last but one subcostal interspace, counting from the 

 apex of the wing. The second of these spots always contains a black 

 ocellus, pupilled with white. On the fifth interspace (last median) are 

 usually faint indications of a fuscous dot in about one-third of the speci- 

 mens examined ; in one instance this dot is distinct and pupilled with 

 white. 



The ochraceous spots are not sharply defined unless very well devel- 

 oped 1 their length is not more than one-third that of the inner margin of 

 the wing ; in breadth they sometimes occupy the whole interspace, leaving 

 only a narrow border of fuscous on the nervule, while sometimes they are 

 almost obsolete. The spots are always truncated on a line nearly parallel 

 to the outer margin of the fore wing, thus leaving a fuscous border. 



Costa mottled with gray and fuscous. 



Secondaries gray-ochraceous with a fuscous border, usually with a 

 pupilled ocellus in the second median interspace ; this is occasionally 

 obsolete. Nervures more or less distinctly fuscous. 



Under side — Primaries gray-ochraceous, the pupilled spot or spots of 

 the upper side shown more distinctly ; the costa and apex mottled pale 



