SEPTEMBER. 



421 



found some figures in the collection which are faulty and 

 defective, and others that could never have been drawn from 

 the larva3 of the particular species that they profess to illus- 

 trate. Mr. Abbot's drawings of the chrysalis and of the male 

 and female moths correspond tolerably well to those from the 

 New York measure- worm. 



The chrysalis of this insect measures nearly five eighths 

 of an inch in length, but sometimes exceeds and often falls 

 short of this measurement. The body is rough, not polished, 

 obtuse and rounded before, pointed behind, and terminates 

 with about six little brown hooks. The cases of the anten- 

 nas and wings are strongly marked and prominent. Its color 

 is a pale brown (perhaps greenish or olive when living), and 

 sprinkled with numerous blackish dots, which in some parts 

 are confluent or run together. It is fastened very strongly 

 by silken threads, attached to the terminal hooks and to the 

 meshes and fragments of leaves, forming its large and irreg- 

 ular cocoon. 



The moths are of a snowy white color. Their wings have 

 the lustre of satin, are so thin and delicate as to seem almost 

 semi-transparent, and have a very minute brownish spot on 

 the lower surface of each of them ; and the middle of their 

 hinder margin is somewhat angular, that of the posterior pair 

 being also slightly scalloped. The head and thorax are cov- 

 ered with white downy hairs. The palpi or feelers are coni- 

 cal and scaly at tip, and project a little beyond the hairs of 

 the front. The tongue consists of two short and menibrana- 

 ceous threads. The anterior shanks are brownish on the 

 outer side. The antennas of the males are feathered or pec- 

 tinated beneath to the tip ; those of the female are threadlike, 

 but subserrated or minutely notched beneath. The stalks of 

 the antennse are white ; but the pectinations and notches are 

 brown. The males are smaller and more slender than the 

 females. Their wings expand from l/g- to 1^% of an inch. 

 The position of the wings when at rest is not known to me. 

 The annexed outline {Jig: IS) of a male will convey an idea 

 of the form and size of the insect. This species, not having 

 been scientifically described or named before, may be called 



