REPORT OF THE STATE ENTOMOLOGIST 1908 13 
INT URIOUSSINSECTS 
Poplar sawfly 
Trichiocampus viminalis Fallen 
This sawfly, first observed in this country in 1888 by Dr J. A. 
Lintner, has become rather abundant upon Carolina poplars in the 
vicinity of Albany during recent years. Complaint of injuries by 
this species has also been received 
this season from Cambridge, N. Y. = 
Dr Lintner stated in 1888 that this 
species was so abundant upon small 
poplars in his garden that it was \ 
necessary to pick and burn the in- 
fested leaves in order to prevent | en 
more serious injury. ) 
Life history and habits. The 
orange-yellow, black spotted, false 
caterpillars may be seen in early 
June. The young larvae feed in i 
company on the under side of the 
foliage, skeletonizing most of the 
leaf. The larvae then break up into 
clusters of 6 to 8 or 10, migrate to 
other leaves and by this time are 
large enough so that everything is 
devoured except the larger veins, 
feeding invariably beginning at the 
Lips Of thewleat.. The presence’ of 
leaves eaten in the above described 
ways is most characteristic of this 

; ‘ Fic. r Poplar sawfly, leaf stem show- 
species. The larvae attain full ing oviposition and a portion of the 
stem greatly enlarged. (Original) , 
growth very quickly and some may 
be observed spinning up the latter part of June. The period of 
‘ oviposition is quite extended and eggs, young larvae and full- 
grown larvae may frequently be observed upon the same tree the 
latter part of June and into July. A second generation of larvae 
occurs about the middle of August. The full-grown larvae of the 
