Degrrijytion of Lejndoptn'ons Larvce. 367 



a soft, pulpy looking caterpillar, with a half transparent appearance, 

 very sluggish in its motions, and would have been taken for anything 

 else in the world as soon as for tlie larva of a lepidopteroas insect, A 

 single specimen only has been observed. 



Number three. Limacodes ? Larva oblong oval, flattened 



above and at the sides, with dorsal and lateral longitudinal keels, 

 ornamented with spinulose and fleshy tubercles and spines, the meta- 

 thoracic pairs, and the last pair on the dorsal keels being the longer. 

 Color, yellowish green, sprinkled with brown and golden spots. On 

 the back are two pairs of conspicuous, rectangular, reddish spots, 

 which are symmetrically arranged eaeh side of the central line. Tips 

 of the long tubercles lighter than the base. 



Under surface very light yellowish green. Thoracic legs white and 

 minute. Head and mouth parts brown, and concealed under the hood. 

 Sept. 10 and 24, 1875. Acer saccharhmm. S. L. Hewitt, Esq., two 

 specimens. 



RejMAEks. This interesting and beautiful species was brought me 

 by Mr. Hewitt at the same time as number one, and was found by him 

 on the same tree, Planus occidentcdis. Subsequently, on the 24th, 

 ult., I found a specimen on the sugar maple, (Acer saccharinum.) It 

 is nearest allied in shape, position of the keels and tubercles, and in 

 size and comparative flatness of the body, to number one herein de- 

 scribed. The general appearance is that of a mottled, golden green, 

 with the four rectangular spots of red very prominent. These features 

 will enable any one taking the larvae to recognize it readily. 



These specimens, after having been fully fed, escaped when about 

 to make the cocoon, so that I am unable to describe it, and shall not 

 obtain the perfect insect from which to determine the species. 



Number four. Limacodes ? Upper and lateral surfaces flat, 



widest in the center, and drawn together in a point at the posterior ex- 

 tremity of the insect. Upper surface arched, highest in the center, 

 lowest at the hood, and attenuated at the caudal extremity, ending in 

 a minute brown point, slightly curved upwards. Lateral boundaries 

 arched above, nearly straight below, but slightly curved upwards pos- 

 teriorly. Lateral surflices joining the dorsal at right angles, making 

 a sharp ridge or keel, extending the entire length of the insect. Larva 

 without spines or tubercles. Color grass green above and at the sides, 

 lighter beneath. Along the dorsal ridges are a few obscure markings, 

 indefinite, except two light spots narrowly edged with brown near the 

 tail, and a few small, blackish dots, on the lateral surface, just beneath 

 the keel or ridge. Stigmata very small, and arranged in a straight 

 line, two thirds of the way down the lateral surfaces. Thoracic legs 



