364 THE BUTTERFLIES OF THE 



a few gray scales each side of the band. Outside this 

 band is a series of blackish-brown roundish spots, with 

 a few whitish scales between each spot and the obscure 

 marginal line. 



Hind wings dark smoky brown, with a mere trace of 

 the usual double row of marginal spots. 



Under side nearly as dark as the upper, with purple re- 

 flections, especially on the hind wings. The hind wings 

 show mere traces of the usual two rows of spots ; the 

 fore wings have the hyaline spots distinct, and the mar- 

 ginal and submarginal bands are to be seen, but the field 

 on which they rest is not so pale as in N. Martialis. 

 Fringes concolorous with the wings. 



According to Harris, the larva of this species feeds 

 on species of Apios and Lathyrus, and perhaps other 

 Legmninosae. It is green, with pale stripes, and has a 

 heart-shaped brown head. 



The chrysalis is rather long and tapering, pale yellow- 

 ish brown, with a few minute hairs on the body, and 

 with the tongue-case prominent and projecting beyond 

 the middle of the breast. There are two broods of these 

 insects, the last hibernating in the chrysalis state. Prob- 

 ably there are more than two broods in the Southern States. 



Atlantic States to Florida, Mississippi Valley, Colo- 

 rado, Arizona. 



187. NISONIADES PETRONIUS, Lintn. 



Expanse of wings from 1.9 to 2 inches. 



Upper surface dark blackish brown, the submarginal 

 band of subsagittate spots oblique, black, being more 

 drawn out inwardly towards the base as it approaches 

 the hind margin. The black markings of the wings are 



