1884.1 77 



March 17th, 1884, I measured one fully 26 mm. long when extended 

 in walking, and about 22 mm. w^hen at rest, and this I think would be 

 the full-growm length : on 18th June I found I had three or four 

 ijocoons formed, and on the same day received four other cocoons from 

 Mr. Fletcher, two containing pupse, and two larvae yet unchanged ; 

 Mr. Fletcher bred the rest of his moths in June and July, mine all 

 smerged between July 12th and August 3rd, and on July 26th Mr. 

 j^letcher sent me eggs from a captured moth. 



The lifetime, therefore, of an individual of this species may be 



iither one or two years in duration, out of which period its egg-stage 



'ccupies three weeks or less, its pupa stage about a month, and the 



nterveniug ten or twenty-tw^o months are spent as a larva. 



J The egg is of a good size in proportion to the parent moth, and 



h of broad-oval outline, and plump, being about li nim. in long 



iameter, by i^ mm. in the shorter, and t* mm. in thickness, and 



eems to be deposited generally on its side ; the shell is thin, dull, and 



:|overed all over with large shallow^ irregularly pentagonal reticulation ; 



t first the colour is much the tint of new chip, but in about ten days 



hh becomes a very pale warm drab, and in another week the head of 



lie larva shows as a brown spot on one side of the egg. 



II The newly-hatched larva is 2| mm. in length, is just the colour 



• ^ new chip, head light brown, the neckplate very much paler brown 



ith a margin of pale skin between it and the head ; the skin 



1 ^)aque, but allowing the internal vessel to be seen faintly, and at the 



velfth segment more plainly ; in ten days this internal vessel has 



ecome dark, and shows plainly through the pale skin : in another ten 



lys, when the larva is 4 mm. long, the body is wholly of an olive 



rown colour, the segmental folds showing somew^hat paler ; three 



eeks later, the larva, with an average length of 6 mm., is slender, 



le head light brown, rather shining ; the skin transparent, but show- 



g its whitish-grey tint at the segmental folds, and also along the 



des when one looks down on it from above ; but the internal organs 



' r-e so dark, of a slaty-drab tint, and show through so plainly, that the 



iieral aspect is very dingy, the glossy plate on the second segment 



J : black behind, and paler in front, the eleventh segment shows paler 



] ian the rest, and in some examples the thirteenth also ; the anal 



ate is pale almost whity-brown, the usual dots are very minute but 



;i ilow dusky on the pale skin. In another fortnight the internal parts 



lii ftpear quite blackish, with paler intervals on the hinder segments, 



[b iiich show the greyish-white of the skin, the head brown, the plates 



jW before, the belly and all the legs colourless ; at this date, during a 



