REPORT OF THK STATIi II.NTOMOLOGIST IQoS 



IXIL'RIUL'S IXSECTS 



Poplar sawfly 



Trichiocainpiis i-imiiialis Fallen 



This sawfly, first observed in this country in 1888 by Dr J. A. 

 L.intner, 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, X. 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 

 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 

 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 invariablv bcginninij" at the 

 tip of the leaf. The presence of 

 leaves eaten in the above described 

 wavs is most characteristic of this 



Fig. r Poplar sawfly, leaf stem show- 

 SpecieS. The larvae attain full ing oviposition and a portion of the 



' stem greatly enlarged. (Origma:) 



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 anrl into July. A second generation of larvae 

 occurs about the middle of August. The full-grown larvae of the 



