Bui. 885, U. S. Dept. of Agricultm 
Plate VI! 
lyHli % *\ ■ " L / " '» 
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\% % 
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Stages in the Life History of the Black Fly. 
A, Eggs and first and second instar larvae; B, eggs and third instar larvae; C, male pupae; 
D, female pupae. All enlarged to the same scale (taken with 48 mm. lens). 
