22 LEPIDOPTERA OF NORTH AMERICA. 



It differs from Terias by its long, separate, and bristly palpi ; 

 from Anthocaris and Pieris, by the shortness of the antennae, and 

 especially by the small glandular space mentioned above. 



1. N. iole Boisd. Spec. Gen. I, 589. 



Wings saffron yellow; the primaries have at the summit a black, 

 rather large, triangular space, marked on the side with two small 

 yellow streaks. Below this space, not far from the internal angle, 

 a spot of the same color, surmounted by a small black point. 

 Secondaries without spots, or with the border, with small, blackish, 

 separate lines, nearly obsolete ; the costal border blackish, marked 

 with a lenticular space of dull gray, partly denuded. 



The under side of the, primaries differs from the upper, the 

 ground color being paler, except along the side, where it is orange 

 yellow ; there is a small, discoidal, black point, and below the 

 apical blackish space there are three blackish spots. 



The under side of the secondaries is greenish yellow, strongly 

 powdered with obscure atoms, especially towards the base, with 

 two transverse obsolete lines, formed by the condensed atoms. 



Body blackish, powdered with yellowish atoms ; antennas short, 

 blackish, annulated with whitish, with the club much compressed, 

 and of a russety tint. Expands one inch. 



Texas. 



BOISD. 



2. N. irene Fitch. 



"Differs from N. iole in having the under side of the primaries 

 destitute of a blackish central dot, and of the three blackish spots 

 towards their inner angle, the hindmost one is here prolonged into 

 a broad stripe extending to the base of the wing, and slightly 

 separated from its inner edge ; and the base of the wing instead of 

 its outer edge is orange yellow." 



Mississippi Valley. 



FITCH. 



RHODOCERA BOISD. 



Head small, retracted ; eyes naked, not prominent ; palpi much 

 compressed, contiguous, furnished with short hairs, scaly ; last 

 article very short ; antennae rather short, truncated, more or less 



