THE CANADIAN ENTOMOLOGIST. 19 



of abdominal feet are fully formed in this stage, and are used by 

 the larvEe when walking. Thoracic feet blackish at tips ; abdominal feet 

 shaded with black towards base. The larvae do not change during this 

 stage, and remain the same colour as just after moulting. They still have 

 the habit of assuming the sphinx-like attitude. 



On the 23rd May some specimens were swollen, and by the 25th all 

 but four had moulted. These passed the third moult soon afterwards. 



Stage /K — Length, 17 mm. Head r.5 to 1.6 mm. wide, very 

 slightly biiobed. The larvis in tliis stage do not show any difference 

 from the last stage. The markings are exactly the same, no 

 change whatever could be detected. The dorsal area is perhaps a 

 little darker than in Stage III. 



On the 27th May four specimens were swollen, and these had 

 moulted by the morning of the 28th. The remaining lirvse moulted 

 during the next two days. 



Stage V. — Length, 21 mm. Head 2.0 to 2.2 mm. wide. In this 

 stage also the larvae do not show any material difference from Stage III. 

 The whole dorsal surface is rather darker, and, in coiisequence, the 

 black band on the sides does not apiiear so conspicuous. The whole 

 skin above the spiracles is a dull-grayish green, finely mottled with black. 

 The lateral stripe is fainter than before. The centre of the spiracle is 

 pale orange in this stage, but ringed, as before, with black. 



On the 31st May two larvte passed the fifth moult, and the remaining 

 specimens within the next few days. 



Stage VI. — Length, 27 mm. The larvK in this stage are very 

 different from the last three stages. Head 3.1 to 3.4 mm. wide, 

 brownish, very slightly biiobed, shiny ; almost the whole upper surface of 

 each cheek consists of one large, black, elongated spot. Between the two 

 large spots the face is darker brown than the lower front of head, and is 

 reticulated with the same colour. On the lower front and sides there are 

 also some darker brown blotches ; ocelli black ; setse pale and slender j 

 at base of each hair there is a small dark brown spot. The head in the 

 last three stages becomes darker with each moult. Body cylindrical ; 

 dorsal and lateral stripes, as well as the black band between lateral 

 stripe and spiracles, are very faint now, the dorsal stripe being the most 

 perceptible. The whole skin above the spiracles is now one mass 

 of beautiful, small, wavy, black dashes, spots and blotches, the skin itself 

 being of a dull yellowish gray, a pale reddish brown, or a dull grayish 



