204 MAINE STATE COLLEGE 



in marketed fruit from Massachusetts, which shows, that the larvae 

 will remain a long time after the fruit is harvested. Any very 

 young larvse will remain in the decaying apples until they are a 

 mass of corruption. We received a lot of windfalls from Mr. 

 True, shipped about September 6th. They were not examined 

 untij. September 12, when in twenty of them we found twenty-five 

 full grown maggots and several pupae in the box. Hanging fruit 

 picked from the same tree at the same date was full of younger 

 maggots. From twenty-three specimens put in a box, fifty-two 

 pupae had emerged by September 20th. This shows that the apples 

 having the older larvse matured and dropped earlier. 



When do the Larv^ Begin to Leave the Fruit? 

 The larvae begin to mature about the first of August, in the early 

 varieties and soon leave the fruit and enter the pupae state. They 

 may be found of all ages, in the summer and early fall varieties 

 during the summer and fall, and emerge when mature. The larvae 

 hatched from eggs laid late in the season may be stored with the 

 fruit and emerge any time during the winter, or remain sometimes 

 by arrested development in the fruit until February. Maggots 

 may vacate fruit when the food supply is abundant and it is 

 occupied by younger larvse of several ages. Thpy leave the fruit 

 through circular openings a little larger than the maggot. Several 

 of these are sometimes found in the same fruit. 



Transformation of Larv^. 



In 1888, August 8th, we found the first Trypeta larva about 

 one-third grown in Benonies and laid some of the apples aside in 

 a box over sand and left the larvae to enter the ground. From 

 time to time through August, September and October we laid 

 others aside, but did not keep the lots separate, not then thinking 

 that the early larvae might transform earlier in the spring. The 

 jars and boxes were kept in a room where there was a fire most of 

 the time and where it did not freeze. The sand was somewhat 

 moist when put in the boxes but as gauze was put over them the 

 moisture soon evaporated so the sand was practically dry. About 

 the first of May we moistened the sand in some of the jars and left 

 it dry in others. Two or three lots of pupae were left in jars and 

 not covered with sand but not one fly came from these. In 1889, 

 August 10th, we put some pupae in a bjx without sand and 

 examined them December 1st and all were dead. One box was 



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