634 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



tubercles on the eud of the body, and two paler less prominent ones on the segments 

 in front. Body dull dark olive-green, "with a blackish broad lateral stripe. Length, 



ginm_ 



Fig. 210.— Alder leaves skeletonized by saw-fly.— Bridgham, del. 



Fig. 211. — Larva of alder saw-fly. 

 24. Nematus sp. 



A second, little larger, larva also occurred with the preceding species 

 in September. 



Larva. — Like the preceding, but larger, without the tubercles ; color olive-brown 

 above, paler on the sides. Head brown, with a large vertical black patch and a 

 smaller oval lateral black one. Length, IS""'". 



