1916 ENTOMOLOGICAL SOCIETY. 33 



At Simcoe I observed on several occasions what was probably this same 

 Tachinid attempting to lay eggs on full-grown larvae of Colorado potato beetle. 



Poplar Sawfly (Trichiocampus viminalis, Fallen (?)). On September 28th 

 the Parks Commissioner of Toronto sent me a few Sawfly larvae that were, attack- 

 ing the foliage of Carolina poplar in the City and asked for the name of the insect 

 and the method of control. On looking over the list of insects given by Dr. Felt 

 in the New York Museum Memoir 8 as attacking poplars I found that the des- 

 cription given there of the larvse of Trichiocampus viminalis. Fallen, agreed very 

 closely with the larvae I had received." The latter were, when full gro^vn, nearly 

 one inch in length, orange-yellow in color, though some had a decided greenish 

 tinii The head and caudal plates were black, and on each side of the body were 

 two rows of distinct black spots, the spots in the upper or subdorsal row being three 

 or four times as large as those in the lower or stigmatal row. On the back and sides 

 were numerous white hairs arising in thin tufts from numerous tubercular-like 

 areas on each segment. These hairs were not more than 14 as long as the width of 

 the body. 



I wrote to the owner of the infested trees for further information on the 

 habits of the insect. The following extract is taken from his reply: 



" The caterpillars were green at first, changing to yellow as they grew larger, 

 . apparently being full grown by the time they had eaten a full sized leaf. They 

 were all side by side on the under side of the leaf tight together, eating from the 

 edge away from the stalk towards it. That is to say, their heads were away from 

 the stalk and they kept getting towards the stalk as the leaf was eaten away. 

 Some of them grew faster than others, or seemed to, and as the leaf narrowed down 

 they dropped off, thus leaving the smaller ones to finish the leaf. When I first 

 noticed them they were small and green, and I should say there were about twenty 

 on a leaf. It was full on the outside edge with all lying the same way, heads from 

 the stalk of the leaf, the middle ones parallel with the thick membrane of the leaf, 

 that is the continuation of the stalk. After dropping off the leaf they crawled all 

 over the board fence and up the side of the house everywhere off the ground looking 

 for holes in the fence. They went into every hole or crack they could find. The 

 fence was covered with them. Into some overalls that were hanging on the line 

 they got and when found were in a cocoon. Every leaf that they were on was 

 completely eaten except the stalk,' and the continuation of it right to the point. I 

 notice that it is not a leaf here and there, as all the leaves on some branches are 

 eaten and othexs not touched. I should say they have been on about l-20th of the 

 branches of the trees and eaten them. As there are six trees about 35 feet high, 

 you may guess the number ^of them. I can only say there were thousands. I killed 

 thousands myself with a broom on the fence." 



THE IMPORTED WILLOW AND POPLAR BORER OR CURCULIO. 



{Cryptorhynchits lapathi L.). 



L. Caesar, Ontario Agricultural College, Guelph. 



About the middle of August I was requested to investigate the injury done 

 by a borer to willows and poplars in the eastern part of Toronto Island. I visited 

 the district on August 21st and again September 8th. On the latter occasion 



