INSECTS INFESTING THE CURRANT. 



221 



Fig. 208. 



Fig. 20S.— Ovipositors of Saw- 

 y flies highly magnified ; a, ovipos- 

 itor of willow saw-fly (N. salispo- 

 miim) ; b, ovipositor of imported 

 currant saw-fly. 



Remedies. — When the larva is 

 noticed on the foliage, use No. 64? 



No. 5 or No. 7. See also No. 80. 



chaptp:r cxxxvi. 



The Native Currant Worm. 



{Pristophora grossularife. — Walsh.) 



Order, Hymenoptera ; Family, Tenthredinid^. 



[Feeding upon the leaves of currant and gooseberry bushes ; 

 a naked green twenty-legged larva or worm.] 



Fig. 209. 



Fig. 209.-Native Cur- 

 rant Worm and Fly ; a, 

 the worm — color, 

 green ; b, the fly — col- 

 ors, black and yellow- 

 ish. 



When fully grown 

 (Fig. 209a) this worm 

 measures about six 

 lines in length ; it then spins a tough cocoon in some sheltered 

 place, usually among the leaves of the plant it infests. 



Two broods are usually produced in one season, and the 

 second brood are changed to flies (Fig. 2096) in the Fall. The 

 latter deposit their eggs upon the twigs, and these eggs do not 

 hatch until the following Spring. 



The wings, of the perfect fly expand from four to six lines ; 

 the body is black, and the thorax is marked with pale yellow- 

 ish. — Riley, ninth Missouri Report. 



Remedies. — When the larvse appear on the foliage, use No. 

 64, No. 5 or No. 7. See also No. 80. 



