o 



26 THE CANADIAN ENTOMOLOGIST. 



black than others. Just after moulting, in general appearance the larvae 

 are black, but after a day the skin is of a shiny, semi-translucent greenish 

 tint, and the tubercles are each in a field of pale reddish-brown, which, as 

 in Stage I, gives the larva; a reddish appearance. The dorsal stripe is 

 distinct, of a pale bluish-green colour. The tubercles are large (i very 

 small), shiny black, the dorsal series bearing a bunch of short, barbed, 

 black bristles. Tubercle ii has a shining base. The bristles from lateral 

 and lower tubercles are pale, rather reddish. Spiracles black and very 

 small. Thoracic shield not so conspicuous as in Stage I. Thoracic 

 feet and prolegs concolorous, darkened at tips. 



On the 2nd July some of the larvae passed the second moult, others 

 on the 3rd and 4th. 



Stage III. — Length 6.5 mm. Head, 0.8 to 0.9 mm. wide ; almost 

 whole upper surface of cheeks dark shiny brown, clypeus and lower 

 portion of cheeks pale — of a yellowish-brown tinge, — mouth-parts 

 blackish, or dull reddish ; hairs on face long and short, the long ones 

 mostly black, short ones pale ; ocelli black, antenna? brownish, the basal 

 half pale. In general appearance the larvae in this stage are dark brown. 

 On examination with a lens, the skin is seen to be greenish, covered with 

 brown blotches. The dorsal stripe is pale blue and distinct. The 

 tubercles are shiny black, i very small, ii very large, with a polished 

 base, iii slightly smaller than ii, and iv slightly smaller than iii. Bristles 

 from tubercles distinctly barbed. The colour of the skin between 

 tubercles ii and iii, and iii and iv is yellowish, with a slight reddish 

 tinge. The bristles from dorsal and lateral tubercles are mostly black, 

 but these tubercles also bear a few pale bristles. The bristles from 

 ventral surface are pale and shorter. The dorsal tubercles on segments 

 12 and 13 bear a few very long bristles. The spiracles are very small, 

 black and close in front of tubercle iv. The thoracic feet and prolegs are 

 concolorous with venter, but are darkened in front. 



During the morning of the 6th July a few specimens passed the third 

 moult; others moulted on the 7th, Sth and 9th. 



Stage IV. — Length, 10 mm. Head, 1.2 to 1.3 mm. wide, depressed 

 at apex, lobes almost wholly black, space on sides of cheek, just above 

 ocelli, pale brownish; lower front of face brown, with the exception of 

 central portion of clypeus, which is blackish; antennae brown, pale at 

 base; ocelli black, mouth-parts as before. The larvae in general 



