RHODOCERA. 23 



arcuated, enlarging from the middle to the extremity ; thorax rather 

 robust, covered with fine silky hairs. Wings rather robust, dis- 

 eoidal cellule closed. The primaries always»have the summit more 

 or less sharp and angular ; the secondaries sometimes furnished 

 with a prominent angle, forming a groove, which embraces the 

 lower part of the body ; body shorter than the secondaries. 



Larva feebly pubescent, attenuated at both extremities, green, 

 with a paler lateral ray. 



Chrysalis much arcuated, spindle-shaped at both ends ; always 

 attached by the tail, and a transverse line over the body. 



Rliodocera strongly resembles the next genus, Callidryas ; but 

 it differs from that in the arcuated antennae and angular wings. 

 The ground color is yellow, more or less pale. Ordinarily, there 

 is a ferruginous spot at the extremity of the cellule of each wing. 

 The median nervure of the secondaries is more prominent than in 

 the other genera. The males differ from the females in the more 

 lively yellow of the wings. In the American species, the costal 

 border of the primaries of the males is hispid, and rough to the 

 touch. 



1. R. maerula Fab. E. S. Ill, 1, 212. Figured in Cram. Pap. II, pi. 129. 

 Hbst. Pap. pi. 103. Donov. Gen. illust. of Ent. pi. 2. Boisd. et 

 Lee. 71, pi. 23. R. eclipsis Cram. Hbst. 



Yellow citron above, with a black point on the middle of the 

 primaries, and one of pale orange, slightly circled with black on 

 the secondaries. 



The primaries are somewhat falcate at the summit; along the 

 outer border, a range of small orange points ; secondaries, angular. 



Under side paler than the upper ; discoidal spot of each wing 

 ferruginous, and marked with a white point. 



Body of same color as the wings ; antennae reddish 



Female, more lively yellow than male. Expands three and a 



half inches. 



Southern States. 



Boisd. 



