COMPARATIVE VARIABILITY IN THE HONEY BEE. 



the reexamination of cases showing the greatest variation we 

 think the figures are nearly correct. Since the drones varied over 

 5 mm. on an average more than the workers and any error in 

 measurement could scarcely be more than I or 2 mm. we feel 

 justified in concluding that in this case the drones vary consider- 

 ably more than the workers. The greatest variations were in 

 Lot III. of the workers, where the variation was from 32 mm. to 

 42 mm., and in Lot VI. of the drones, where the variation was 

 from 35 mm. to 48 mm. Lots I. of the workers and V. of the 

 drones taken from the same hive at the same time show a range 

 of variability in the ratio 8: I I. 



TABLE I. 



VEIN R. 



Drones. 



Workers. 



DIAGONAL MEASUREMENT OF CELL R. 



This measurement being taken in one of the most variable 

 regions of the wing shows a remarkable difference in the range 

 of variability of the two sexes. The measurement of this distance 

 was quite easy since the limits are well marked and easily distin- 

 quishable and in no case do we think there was room for doubt 

 in the length to more than i mm. This fact taken with the 

 length makes these measurements a very good test of the relative 

 variability. In this region of the wing a very large part of the 

 abnormalities were found, so that we conclude that this portion 

 shows more variation than any other ; but in spite of this tendency 



