THAIS MEDESICASTE. 



1C9 



hinder pair of wings is curved downwards as if to 

 leave room for the movements of the abdomen. The 

 caterpillars are short and cylindrical, covered with 

 fleshy spines and short hairs, the first segment pro- 

 vided with a fleshy bifurcated tentaculum. They 

 live solitarily or in small groups on the Aristolochia^ 

 and obviously bear a considerable analogy, as well 

 as the perfect insect, to Parnassius. The chrysalis 

 is cylindrico-conic, somewhat angular in front. 



The species represented on the annexed plate may 

 possibly be a variety of T. Ruinina. Surface pale 

 ochreous yellow, with a black marginal band divided 

 on the upper wings by a series of eight or nine 

 yellow spots ; along the costal margin are several 

 black irregular transverse bands, some of them in- 

 closing rounded red spots; inferior wings with a 

 black festooned line along the exterior border; 

 towards the base are always three red spots, one 

 near the abdominal margin, another in the upper 

 part of the discoidal cell, and a third near the ante- 

 rior edge, usually united in the form of a transverse 

 band with that in the cell. Body blackish, marked 

 with rows of fulvous spots. 



The caterpillar lives on the Aristolochia pistolockia. 

 Sometimes the colour is reddish-yellow, at other 

 times brown or dull yellowish-green, with numerous 

 rows of black lines often interrupted ; the body 

 bearing six rows of fleshy spines, of an orange yel- 

 low hue, and ciliated with black at the extremity. 



The insect is found in Languedoc, in the neigh- 

 bourhood of Digne, &c. 



