150 



THE CANADIAN ENTOMOLOGIST. 



The larvae are evidently hatched within two or three days after the eggs 

 are deposited, and are at first slender, whitish worms with black heads 

 and thoracic legs. They crawl at once to the leaflets and appear to select 

 the more tender ones for the commencement of their work. They grow- 

 quite rapidly and reach the first moult on the third or fourth day. Before 

 moulting they are more whitish in color, and the head particularly loses 

 its ordinary color. After the moult the head is jet black and glistens like 

 a glass bead ; the six thoracic legs have also the same jet black color ; 

 otherwise the larva is clear green with a slightly darker dorsal line. There 



Fig. 6. — Selandria harda (Say). Leaf of ash showing'position of eggs in 



petiole and work of larvre. 



are seven pairs of pro-legs or false legs along the abdomen and one pair 

 at the tail end. The body is not hairy, neither is it slimy as in some 

 members of this genus, but the skin is somewhat wrinkled. 



The worms are mostly found adhering to the under surface of the 

 leaves, and forming a coil, though sometimes extended, especially when 

 feeding, and as they eat away the entire leaf, cutting away at the edges oi 

 at the holes entirely through the leaf, they obtain any poisonous substance 

 sprinkled or dusted on the upper surface. 



