243 ORDER LEPIDOPTERA. 



modified so as to exhibit a forked shape, upon which the Boles of the feet baly arc seen. 

 The OOOOODS are lornud of silk intermixed with fragments of wood and bark. The chry- 

 Balida are not notched upon the back. The larvae feed upon leaves. 



Pycjera albifrons. (Plate xxxvii, fig. 3 - 5.) 



Wings deflexed : primaries clouded ; anterior margin marked with an elongated spot of 

 cream-color terminating in the outer angle and dotted slightly with brown, trans- 

 versely banded with white, black or dark brown : secondaries brown, margined with 

 a lighter shade/Thorax of the male banded with two distinct black lines joined by 

 two short parallel connecting lines, between which there is a scpuare yellow or cream- 

 colored or light buff spot. The thorax of the female is ornamented with three cross- 

 bars : antenna? setaceous, with a terminal enlargement. Antenna? of the male ? 



Caterpillar striped upon its back with yellow and brown ; underside lake, and furnished 

 with three pair of legs and four pair of proplegs : it is half an inch long. It spins a 

 thin white web between the leaves late in autumn, ami appears early in the spring in 

 perfect state, feeding upon the leaves of the white and other oak trees. They are 

 gregarious when young. The cocoon is | inch long, and has eight or nine segments. 

 The larvae of this species feed at times upon the leaves of the oak, and sometimes nearly 



defoliate a tree when they are numerous. An instance has fallen under my observation, in 



which a tree of this kind was well nigh deprived of leaves by these insects for two or 



three years in succession. 



Eidryas grata. Woodnymph. ( Plate xlvii, fig. 8.) 



Forewings pearly white ; basal half trimmed with purplish brown : outer margin widely 

 bordered with purplish brown, the inner edge of which is banded with olive, which 

 extends and widens upon the posterior border, forming near the middle a large patch : 

 exteriorly, upon the border and near the edge, it is ornamented with a delicate bluish 

 line. Hindwings a yellow buff, bordered behind with purplish brown, which does not 

 reach the outer angle, but extends along the inner edge : it is trimmed with silver- 

 gray cilife. Beneath, the forewings are pale buff, marked upon the basal half with 

 brown, but confined to the costa, which terminates in two roundish spots. Hindwings 

 paler yellow buff, and marked in the middle with a single brown spot. Abdomen buff 

 brown, silky ; the rings are banded with lighter, and terminated with a zone of the 

 lighter buff. 

 This beautiful moth is rare here. I have taken it only in Berkshire (Massachusetts), 



but it exists in collections in Washington and Albany counties in this State. 



