THE MONTHLY BULLETIN. 



153 



results obtained at the Cornell Agricultural Experiment Station against 

 the cherry fruit-fly : 



THE EGG. 



The eggs are oblong, shiny white, and are deposited in the fruit through a punc- 

 ture in the skiu which the female makes with the ovipositor, beyond the reach of 

 all arsenicals and poisons. As the maggot develops a dark sunken area is formed 

 around this puncture, which makes the infestation quite evident. 



THE LARVA. 



The larva (Fig. 52) is of the typical dipterous form, conical, white to cream 

 colored and about one-fourth of an inch in length when fully matured. When this 

 stage is reached the fruit usually drops and the maggot escapes and enters the 

 ground to the depth of about one inch and pupates. Only one generation occurs each 

 year. 



THE PUPARIUM. 



The puparium (Fig. 53) is oval, straw colored, plainly segmented, and is a 

 trifle over three-sixteenths of an inch in length. This stage may be found any time 

 during the fall and winter months in the soil around infested plants. 



Fig. 53. — The puparium of the yellow 

 currant and gooseberry fruit fly, Epochra 

 canadensis. Greatly enlarged. (Original.) 



THE ADULT (Figs. 55 and 56). 



Pale clay-yellowish, with a brown crossband on the third and fourth abdominal 

 segments, stature short and somewhat broad ; ovipositor of medium length, broad 

 and broadly truncate ; wings with narrow pale brownish rivulets and with a fourth 

 longitudinal vein which is not curved forward at the tip. 



The head resembles that of Trypeta fratria in shape, only the front is somewhat 

 broader, the vertical diameter of the eye is a little smaller ; and the anterior edge 

 of the mouth is more projecting. On the border of the front the described specimen 

 bears, on each side, three long but rather weak black bristles. The antennae are of 

 a more saturate yellow, not reaching the edge of the mouth ; their third joint is 

 rounded at the tip ; arista blackish, yellow toward the basis, with a very short 

 pubescence. Rostrum and palpi are pale yellow, the latter not reaching beyond 

 the anterior edge of the oral opening. Thoracic dorsum is of a very thin, whitish 

 bloom, only the double middle stripe and the narrow lateral stripes not pollinose, 

 rather shining and somewhat darker than their surroundings. The posterior end 

 of the thoracic dorsum and the scutellum is likewise without pollen, shining, very 

 pale yellow ; a not very broad yellowish stripe runs from the humeral corner to the 

 root of the wings. The scutellum is convex and not vei'y large ; in my specimen it 



