PROCEEDINGS, 1917. 59 



The Male Larva. — When full grown and ready to spin its cocoon is 20mm.-25mm. 

 in length and 4mm.-5mm. in width across the dorsum of the second and third abdom- 

 inal segments. The pencils of black hair on the first thoracic and eighth abdominal 

 segments are 6mm.-7mm in length. The four brushes on the dorsum of the first four 

 abdominal segments are 3mm.-3.5mm. in length and of a creamy white color. The 

 pencils on the sides of the f rst two abdominal segments are 2mm.-3mm. in length; the 

 first is of a yellowish color, the second black. All other markings, tubercles, etc., are 

 present and well developed. The general color yellowish gray. 



The Female Larva when ready to spin is 30mm.-35mm. in length and 5mm.-7mm. 

 in width across the dorsum of the second and third abdominal segments. The pencils 

 of black hairs on the first thoracic and eighth abdominal segments are 6mm.-7mm. in 

 length. The pencils on the sides of the first two abdominal segments are 2mm.-3mm. 

 in length, the first pair being a dirty white color, the second black. The four brushes 

 on the dorsum of the first four abdominal segments are 3mm.-3.5mm. in length and of 

 a dirty white color. As in the case of the male, all other markings, tubercles, etc., are 

 present and well developed. General color yellowish gray but not as bright as the 

 male. The period between the fourth moult and spinning was from nine to fourteen 

 days and between the fifth moult and spinning, in the case of a larger number of the 

 females, from eight to fifteen days. The last moult always took place after the cocoon 

 was spun, generally from two to three days after spinning had started. 



THE COCOON. 



When the larva was mature and ready to pupate it sought out a suitable place 

 such as the trunk of a tree on a branch or fence or even among leaves. It then spun a 

 large loose outer covering, and a smaller, closer-woven inner sack or case, in which the 

 last moult occurred, and the insect transformed to the pupa. The size of the cocoon 

 varied according to the size of the larva. 



The Male Cocoon is smaller than that of the female. The outer case is a loose 

 yellowish covering made of silken threads intermingled with the long black hairs from 

 the body. The inner case is much smaller and more closely woven , composed of silken 

 threads mixed with shorter hairs of the body. The entire length is 15mm.-20mm. and 

 the width at the widest part 10 mm. -12mm. 



The Female Cocoon is larger and more loosely woven than that of the male, the 

 composition, however, is the same, being a mixture of silken threads and hairs from the 

 body. It measures 20 mm.-30mm. in length and 10 mm.-15mm. in width at the widest 

 part. 



THE PUPA. 



Both male and female pupae are at first pale yellowish green in color but later on 

 turn black with brown and yellowish tints. The ventral surface is smooth while the 

 dorsal surface is covered with short fine whitish hairs and shows distinctly the place 

 where the four white brushes occurred on the first four abdominal segments of the larva. 



The Male Pupa is 10mm.-13mm. in length and 4mm.-5mm. in width. On the 

 ventral side the eyes, wings, and antennae of the future adult can be plainly seen by 

 the outlines of the raised portions of the pupal case. The general color is blackish brown, 

 some specimens being much lighter. The pupal period of the male was nearly twice as 

 long as that of the female, being from fifteen to seventeen days between the last moult 

 and emergence. 



The Female Pupa is 18mm.-20mm. in length and 7mm.-8mm in width. The 

 pupa is oval in shape tapering towards both ends. The position of the eyes, antennae 



