CHERRY INSECTS 807 



attributed to cingulata. It apparently has a somewhat more 

 northern range than that species. In their ha})its, hfe history 

 and character of the injury inflicted, the two species are very 

 similar. In New York the flies of R. fausta (Fig. 263) appear 

 in early June, but do not begin egg-laying until alxjut two weeks 

 later. During this period they may be observed resting on the 

 foliage and lapping up drops of moisture or feeding on the honey- 

 dew secreted by the cherry aphis. The maggots of R. fausta 

 are similar in shape and size to those of R. cingulata, but are 

 distinctly more yellow in color ; the puparia, moreover, are of 

 a darker brown color than in that species. 



Control. ♦ 



Experiments in New York have shown that the injury from 

 the cherry fruit-flies may be controlled by sprinkling the foliage 

 with sweetened arsenate of lead at the first appearance of the 

 flies in early June. Satisfactory results have been obtained 

 by using arsenate of lead, 5 pounds in 100 gallons of water, 

 sweetened with 3 gallons of cheap molasses. A pint of this 

 mixture is suflficient for a tree of moderate size. In case rains 

 occur, it may be found necessary to make additional applica- 

 tions. The experience of commercial growers also shows that 

 the sweetening of the poisoned spray is unnecessary and that 

 this pest may be controlled by two applications of arsenate of 

 lead, 4 pounds in 100 gallons, made during the time while the 



flies are emerging. 



References 



Cornell Agr. Exp. Sta. Bull. 172. 1899. 

 U. S. Bur. Ent. Bull. 44, pp. 70-75. 

 Cornell Agr. Exp. Sta. Bull. 325. 1912. 



The Cherry Fruit-sawfly 



Hoplocampa cookei Clarke 



In Oregon and California young cherries are often infested 

 by the larva of a small blackish sawfly which eats out the kernel 



