THE CANADIAN ENTOMOLOGIST. 215 



May 23. Second stage. — Head darker, a depression on the face 

 between the eyes. Otherwise unchanged. Length. 16. 



May 25. Third stage much as before. Length .21. 



May 27. Fourth stage. — In this stage the black colour of the head, 

 ventral plates, thoracic feet and antennal appendages is intensified. The 

 substigmatal fold becomes thicker and more solid in colour. The spiracles 

 and a series of broken yellowish lines on each segment subdorsally make a 

 faint lateral stripe, dorsally and sublaterally translucent dull greenish. 

 Length .33. 



May 29. Fifth stage. — Much the same as before. One larva 

 discovered moulting. The head apparently splits apart vertically at the 

 mouth without previous visible distension. After moult the skin is 

 partially eaten, but the head-covers remain in the web. The body of the 

 larva retains its normal colours, but the head and ventral plates with their 

 appendages are glassy and colourless, except the eyes, which are black, 

 and a faint tinge of black about the mouth, and remains so for several 

 hours after moult. Length .56. 



May 31. Sixth stage. — A decided thickening of substigmatal fold, 

 which now becomes a reddish orange. The broken markings above it 

 and the subdorsal lines are also heavier and more solid in colour. 

 Translucent intervals darker and presenting a slightly shagreened 

 appearance. Instead of being rounded, the upper ventral plate now 

 has a central triangular depression, in the bottom of which is set a short 

 movable spine. This space is dusky yellow. The lower ventral plate 

 has a depression on each side of a rounded longitudinal ridge, with the 

 bottom confusedly punctured. Edge of both plates set sparsely with 

 strong, black setje. Length .84. 



June 12. Seventh stage. — Much as before. Body strongly wrinkled. 

 Thoracic legs and antennal appendages now translucent greenish, ringed 

 lightly with black at the joint. Length, 1.15. 



June 14. Eighth stage. — Not changed, except that the thoracic 

 legs are ringed with orange. The tubercles on the nth segment have 

 increased in size with later moults, but none others seem prominent. 

 Length, 1.35. 



After feeding two days without further moult, the larva? as they 

 mature turn a deep green, except the head and anal plates, which remain 

 shining black, feet translucent. At this time they drop from the web and 

 enter the ground for aestivation, there being in our section a spring and fall 



