128 THANAOS TAGES. 



as this happened they moved off to new habitations ; 

 this change of residence always took place at night, 

 though from the slow and deliberate pace at which 

 they moved, it could hardly be called a " flitting." 



Throughout July these larvae consumed a great 

 quantity of food, so that I had frequently to renew my 

 plant of Lotus, but still they hid themselves, and kept 

 quiet so persistently, that I no longer wondered how 

 it was that no one had ever found this common species 

 for me, even though its food-plant was known. 



After various moultings I secured three more figures 

 of them at intervals, and by July 31st they had attained 

 their full growth. At this time the larvae is nearly 

 three-quarters of an inch in length, with the back a 

 little arched and the belly rather flattened, being just 

 of the same form as when younger ; the body is very 

 plump, and thickest in the middle segments, the seg- 

 mental folds distinct, each segment also subdivided 

 into five portions, the broadest one in front ; the head 

 is somewhat heart-shaped and flattened on the face ; 

 the colour of the body is rather more of a yellowish- 

 green than before, the minute raised points blackish, 

 the dorsal line a darker green, and the subdorsal paler 

 stripe delicately edged above and below with a fine 

 faintly darker line ; the anterior pair of tubercular 

 dots just perceptible on each segment, but only with a 

 strong lens ; the spiracular region forming a slight 

 ridge of paler whitish-green, the spiracles very small 

 and red in colour; the head is purplish-brown as 

 before, but with the addition of an ochreous streak 

 from the crown down the front of each lobe, united 

 below by another broad transverse streak at some 

 distance above the mouth, and also of a spot of the 

 same colour on each cheek. 



Having sent one to Mr. Hellins, I found my two 

 remaining larvae had, early in August, fairly left their 

 hiding places, and were ascending the sides of the 

 cylinder, first one and afterwards the other ; presently 

 having gained a footing on the green leno cover at the 



