July, 1914.] 



THE APPLE MAGGOT. 



87 



Variety. 



Table 25. 

 Emergence of Adults in WIS — Two-Year Life Cycle. 



Date fruit 

 collected. 



Emergence of adults — month of July. 



II 



1213 14 15 



1617 18ll9 



21 



22 



23 24:25 26 27 



28 



29 



Total 



Jersey Sweet j Sept. 11, 



picked I 

 Jersey Sweet Sept. 11, 



drops ' 

 Jersey Sweet ! Sept. 1, 



drops I 



Sops-of-Wine| Aug. 10, 



picked 



Totals .1 



1911 I Males 



Females. 

 1911 Males... 



Females 

 1911 Males... 



Females 

 1911 Males.. . 



Females 



4 1 



1 

 I 2 



4114 



11 1 



5 1 



7 1 



r 



9 I5I 5 



13 



9 20 



f 1 

 1 1 

 1 3 



3 5 5 138 



9 



16 



44 



44 



5 



8 



4 



8 



DESCRIPTION OF STAGES. 



In an extended account of this species Harvey (25 p. 215) 

 published careful technical descriptions of the various stages. 

 Illingworth also (34 p. 151) gave complete and detailed descrip- 

 tions. 



The following is condensed from the above. 



Adult Female. Color black, marked with white; length 6 

 mm.; spread of wings 12 mm. 



Head. — Light brown, fading to pale yellow on lower face; 

 hind margin of eye white. Frontal bristles black, except a 

 small yellowish pair behind the ocelh. Eye green, with bluish 

 or brown reflections. Antenna orange; length, .5 mm.; 3-jointed, 

 with slender, 2-jointed arista. First segment of antenna with 

 black hairs on distal front margin, second segment with black hairs 

 on inner face and outer distal margin, third segment pubescent. 

 Mouth broad; proboscis and palpi light yellow; palpi short. 



Thorax — Black, with white stripe on each side from humeral 

 callus to base of wing. Four gray, longitudinal stripes on dorsum ; 

 arranged in pairs, separated by broad, median space; outer 

 stripe of each pair the longer; the stripes of each pair confluent in 

 front. Scutellum elevated, white above, the base and sides 

 black. 



Legs — Front pair shortest, length 3.8 mm.; middle pair longest, 

 length 4.5 mm. Femora and tibiae equal, tarsi a little shorter. 

 Femora black at middle, lighter toward ends. Tibiae yellow. 

 Tarsi with proximal joints yellow, distal joints covered with 

 black hairs. 



