CARNIVOROUS BUTTERFLIES CLARK 485 



The head is of a shining olive black. The wliole surface of the 

 body is densely sprinkled with blackish points, giving it a rough 

 appearance, and adding to the appearance of the depth of the 

 segmental divisions. The legs and claspers are similar in color to 

 the body. 



A larva in the second stage measuring one-twelfth of an inch in 

 length is thus described by Mr. Frohawk. 



The first and last segments are flattened, projecting, and rounded, 

 overlapping the head, which is withdrawn while at rest, and the 

 anal claspers. The body is much arched, having a considerably 

 elevated medio-dorsal ridge. The sides are flattened and slope to 

 a lateral ridge ; the under side is also flattened. 



The ground color is a pearly white, thickly studded with very 

 minute blackish points, and scattered over the whole surface are a 

 number of bristles, varying in length, all having bulbous dark 

 shining brown bases. The longest are situated on the dorsal and lat- 

 eral regions. The spiracles are shining dark brown. The segments 

 are beautifully marked with purplish pink, forming longitudinal 

 stripes, the most conspicuous being the medio-dorsal and lateral 

 stripes. The three other stripes, two above and one below the 

 spiracles, are made up of oblique markings. The head and prolegs 

 are brown, and the claspers whitish. 



Mr. Frohawk noticed that there is a remarkable similarity be- 

 tween the buds of thyme and the larvae, both in their coloring and 

 in their pubescence, so much so that it requires very close examina- 

 tion to discover the little larva?. They generally conceal them- 

 selves inside the blossom, making detection all the more difficult, 

 but usually a small hole is eaten through the calyx, when the larva 

 may sometimes be seen with only the anal segment protruding. 



A larva in the third stage one-eighth of an inch long was similar 

 in coloring, pattern, and structure to the one just described, except 

 that it was brighter, the hairs a good deal longer, and the head 

 shining black. 



This third stage larva molted for the third time on July 26. 

 Twenty-four hours after molting it still measured only one-eighth 

 of an inch when fully extended. The general coloring was now more 

 uniforml}' ochreous pink, and duller. The second and third seg- 

 ments were humped. The first segment was sloping to the front, 

 sunken in the middle, and rounded, overlapping the head, and bore 

 a large black oval patch in the center. The three posterior segments 

 were also comj^ressed and sunken. Each segment was humped sub- 

 dorsally, forming a deep longitudinal medio-dorsal furroAv. The 

 sides were concave, and the lateral ridge projected and overlapped 

 for the entire length, hiding from view the legs and clasi^ers. There 



76041—26 32 



