28o MAINE AGRICULTURAL EXPERIMENT STATION. I915. 



Below is given a table showing the dates on which larvae left 

 the fruit in the laboratory in 1913,1914 and 1915. 





1913 





1914 





191S 



7 ' 



on July 



10 



I 



on July 13 



I 



on July 17 



7 





14 



4 



23 



1 



20 



16 





19 



2 



24 



1 



24 



n 





21 



I 



25 



2 



26 



9 





23 



3 



29 



I 



28 



6 





24 



2 



Aug. s 



3 



29 



2 





25 



4 



I 



I 



31 



3 





26 







3 



Aug. 3 



6 





28 







2 



7 



8 



Aug. 



2 







2 



9 



4 





4 







I 

 I 



II 

 21 



The extreme dates are July 10, 1913, and August 21, 1915. 



Technical Description. 



Egg. Oval, translucent, whitish. 



Larva. Length 6-8 mm.; width 1.25-1.50 mm. Elongate, sub-cylin- 

 drical ; color pinkish orange above, lighter beneath, pro- and meso- 

 thorax almost white; tubercles light brown, spiracles brown; head 

 either dark or light brown, shining, the suture lines darker or almost 

 black; anteclypeus and labrum brown, mandibles dark; palpi and an- 

 tennae colorless ; a conspicuous white line on the head on either side 

 of the suture between the clypeus and epicranium, fusing above the 

 clypeus and extending nearly to its base, thus forming two sides of a 

 triangle ; ocelli 6 on each side. Head often partially withdrawn under 

 the transparent cervical shield which is straight on its cephalic margin 

 and curved outward on its caudal. Body widest at abdomen 4, but all 

 segments about the same size except abdomen 8, 9, and 10, which are 

 conspicuously smaller. Legs brown, tips of prolegs brown, ninth ab- 

 dominal tergite chitinous, dark brown; caudal setae prominent; 4 or 

 5 stiff brown setae around anus. See figure 60 G. 



The above applies to the fourth instar. In the first 3 instars (rarely 

 only in the first 2) the head is deep shining black and the cervical shield 

 blackish, as is also the chitinized ninth abdominal tergite ; the legs are 

 almost black ; the body is white, sometimes more or less orange above ; 

 the head is never withdrawn beneath the cervical shield. 



Setae. The arrangement of the setae on the fifth abdominal segment, 

 the head and the antenna is shown in figure 58. The drawing of the 

 lateral aspect of the fifth abdominal segment was made from the right 

 side. All drawings were made by the aid of a camera lucida. 



