In its mature form the larva is about one-half of an inch in length. The body is onisciform, flattened at base, furnished with retractile legs, and has the back elevated into a rounded ridge, which slopes backwards from the sixth segment. The sides are rather deeply hollowed, and in the middle of each segment, from the third to the eleventh, is a vertical, narrow depression. The last segments are flattened, the last of all terminating roundly, its sides being narrowed and slightly incurved, while the second segment is flattened, arched and bent nearly flat over the head. Standing on the body is a ridge, tubercular in nature, which in each segment from the third to the eleventh is distinct and cleft to the body. In color, specimens vary. Some examples are white, others decidedly greenish, but many have the posterior slope of the second segment black or dark brown, while a few have most of the back a dark brown, irregularly mottling a light ground, or with small brown patches diffused over the back, but mostly on the anterior segments. The entire surface is velvety. This appearance is caused by minute stellate glossy processes, scarcely raised above the surface, mostly six-rayed, and sending from the centre a concolored filamentous spine a little longer than the rays. These stars are arranged in nearly regular rows, and are light, except in the brown patches, where both star and spine are brown. This velvet-like condition of the skin only reveals its true composition under a magnifying glass. On the eleventh segment, near the posterior edge of the back, is a transverse slit, in a sub-oval spot, from which proceeds a membranous process; and on the twelfth, on each side, is a mark like a stigma, but a little larger, from which proceeds a membranous tube, ending in a crown of feathery tentacles, these three special organs being exposed or concealed at the will of the larva. The head is small, obovoid, dark brown, and is placed at the end of a long, pale green, conical neck, which is rectractile, both neck and head being covered by the second segment. Before changing to a chrysalis, the summer larvæ sometimes turn pink, and from pink to brown, or become brown without the pink stage, although others remain white or change to rusty brown. The body contracts to about three-tenths of an inch and takes on a rounded form. The chrysalis is dark-brown or yellow-brown, but varying in color, the wing-cases being dark or green-tinted. Two sub-dorsal rows of blackish dots are found on the abdomen, and sometimes a dark dorsal line. In the few instances in which the butterfly emerges the same season the duration of this stage is from thirty to sixty days, but most chrysalids pass the winter and mature in the spring. [Illustration: NEGLECTA BUTTERFLY. Larva Feeding on Central Florets of Actinomeris, and Guarded by Ants.]