I))vecfs Injurious to tJie Apple. 



125 



Uadei certain comjitions a secoud ))rn(j(l may appear, Imt siicli 

 seems to be \'erv miusual. 



The lar\';e are ereamv-\Yliite, trnilj-like ereatures, witli a dai'k 



FIG. lUO.— SAW OF A FFMALF SAW FLV. 



(Gveatly eiilar:_'i'(l. ) 



brown head and a doulile black ehitinous phite ou the upper surface 

 of the anal segment. When mature they reach ^ inch in length. ( »n 

 the first three segments are six jointed legs, on the fifth to the tenth 

 are pairs of sncker feet, and on the hist se,^ment another pair of sucker 



feet. 



Tliese larva' burrow into the i'ruitlets and eat out large ca\'ities, 

 often attacking apples when they are no 

 hirger than cob nuts. Each of these large 

 irregular cliambers communicates ^\•ith 

 the exterior by a small round la.ile which 

 is usually noticed on the side or near the 

 eye of the apple, fhit of this opening 

 one fre(iuently finds " frass " and much 

 moisture exuding. 



Attacked fruitlets can fie seen on a 

 tree long liefore they fall. The larva:' 

 may he found of all sizes in June and 

 early Julv. Tossibly two Ijroods over- 

 lap (o). The length of larval life 

 seems to \"ary, some mature in four 

 weeks, otliers take five weeks or nii:)re. 



If the fruitlet is destroyed liefore the larva is mature h nmves 

 to another. Wlien attack is early, and the i'ruitlets small, five 

 or more may lie damaged by each larva. When mature, the larva' 



!/■■. E<U,nh'n 

 ■'IG. IQl.— THK AFI'LF SAWFl.V 

 (Natural .size aial L-nl;n',:eil.) 



