186 THE ENTOMOLOGIST. 



shading into darker green down the side to the inner margin of 

 the wing ; the wing is also a clear green, darkening at the base 

 and of the same colour as the antennse and legs; the inner 

 margin is dark green and sharply defined by an inner sub- 

 marginal, pale greenish yellow stripe, which blends into the 

 darker colouring of the wing ; this light stripe extends down the 

 side of the abdomen, in which are placed the whitish spiracles. 

 There are from three to four small black dots, forming a sub- 

 spiracular series, one on each segment, and below a dark 

 purplish-brown band extending from the wing along the abdomen, 

 which is broken up into four blotches by the segmental divisions ; 

 the last one is generally very pale and the smallest ; at the end 

 of the discoidal cell is a small black dot, a sub-marginal series 

 of six smaller black dots situated between the nervules, and 

 a few very minute black specks on the thorax. Such is the 

 description when eleven days old. It is attached by the anal 

 hooks to a pad of silk spun upon any suitable object the larva 

 selects for the purpose, and also by a silken belt round the 

 middle. The pupal state occupies about eighteen days. 



I had the opportunity of observing a number in the act 

 of pupating, the process generally occupying about twenty 

 minutes, from the splitting of the larval skin down the thorax 

 until the last writhings of the pupa to firmly anchor the hooks 

 into the silk ; the actual casting of the skin is accomplished in a 

 few minutes. The entire transformation of edusa from larva to 

 pupa is precisely similar to that of Garter ocephalus palcemon, 

 which I recorded Entom. xxv. p. 255. 



The same individual served throughout for the above history. 

 The egg stage occupies about six days ; the larval stage about 

 thirty days ; and the pupal about eighteen days ; such being 

 the average periods for the metamorphoses of the summer 

 emergence. 



From the following notes, relating to autumnal-reared speci- 

 mens, it will be seen that the duration of time embraced by the 

 different stages varies considerably, and is wholly influenced by 

 the conditions of temperature to which they are subjected. 



A female captured August 20th, 1892, deposited a few ova the 

 next day; many more deposited on the 24th; several more on 

 the 26th ; and she died on the 27th. The first larva hatched 

 out on the 27th ; many hatched September 1st. The individual 

 hatched on the 27th began spinning a layer of silk along the 

 midrib of a clover leaflet late on the afternoon of September 1st, 

 and thereon fixed itself that night, preparatory for its first moult, 

 which took place the following day, the slough comprising its 

 first meal. 



Second moult on 13th September, again feeding on its cast 

 skin. 



Third moult, early morning, 20th September. 



