242 MYELOIS PINGUIS. 



of August, and on the 15th a male from the pupa 

 within the bark. 



It appears that some of the larvae are feeding the 

 whole summer through, but whether they are more 

 than one year in feeding up is at present a doubtful 

 point, the evidence being rather conflicting, although 

 it justifies Dr. Wood's opinion that some portion of a 

 brood passes two seasons in the larval state. 



The larva when young is very pale, of a dirty 

 whitish or greyish colour, having a blackish-brown 

 head and plate at each end of the body, and showing 

 partially an internal dorsal vessel of dark greyish ; 

 but when full-grown it measures about three-quarters 

 of an inch in length and is tolerably stout in propor- 

 tion, tapering a little from the third segment to the 

 head, which is flattened and less than the second in 

 width ; it tapers also a little from the eleventh to the 

 anal tip; beyond the thoracic the other segments on 

 the back have each one subdividing deepish wrinkle, 

 followed by one or two more or less distinct though 

 they are deeper on the sides, and the region beneath 

 the spiracles is puckered ; the anal legs are close 

 together, and well beneath the end of the body ; the 

 colour of the head is chestnut-brown, marked with 

 blackish-brown ; the plate on the second segment is 

 much paler in front, but broadly blotched at its hind 

 margin with the darker brown where it is dorsally 

 divided ; the anal plate is chestnut-brown ; the ground 

 colour of the back and sides is a deepish flesh-tint, 

 gradually becoming paler and rather ochreous on the 

 belly ; an interrupted dorsal line of much darker flesh- 

 colour shows plainly on the front of each segment just 

 as far only as the transverse wrinkle ; the tubercular 

 dots and the brown hair emitted by each are so minute 

 as to be visible only through a lens ; the characteristic 

 ocellated spot on each side of the third and twelfth 

 segments is ringed with chestnut-brown, having a 

 flesh-coloured centre with a longish hair; the small 

 round spiracles are of the ground colour ringed with 



