OLFACTORY SENSE OF THE HONEY BEE 315 



53 to 72, with 64 as an average; group 3, from 217 to 280, with 

 an average of 236; group 4, from 108 to 148, with an average of 

 115; group 5, from 240 to 290, with an average of 268. To 

 obtain these figures the pores were counted in group No. 1 in 

 5 individuals, in group No. 2 in 10, in group No. 3 in 11, in 

 group No. 4 in 14 and in group No. 5 in 6. For the front wing 

 there is an average number of 616 and for the hind wing 383, 

 making an average total of 1998 pores for all four wings of a 

 drone. 



Legs of drones. On the legs of drones group 6 is constant and 

 is always double on the third legs; its pores vary in number from 

 17 to 25, with 20 as an average. On the second legs group 6 is 

 absent three times out of nine, and once it occurs on the inner 

 instead of the outer side. When present here it is always single 

 and its pores vary in number from 9 to 16. On the first legs 

 this group is missing only once. It is always double and its 

 pores vary in number from 17 to 20. 



Group 7 is missing once on the third legs and twice on the 

 second and first legs. For the third legs its pores vary from 11 

 to 19, for the second legs from 16 to 23, and for the first legs from 

 17 to 21. 



Groups 8 and 9 are much scattered and are difficult to sepa- 

 rate. Group 8 is almost always and 9 is only occasionally pres- 

 ent. Their combined pores vary from to 27 for any leg. 



On the third legs groups 10 and 11 almost always exist as one 

 scattered group, with pores varying in number from 13 to 22. 

 On the second legs both groups are generally present, their pores 

 varying in number from 9 to 24. Both groups are always found 

 on the first legs. Here their pores vary in number from 10 to 

 18. 



Groups 12 to 15 are invariably present and are considerably 

 scattered, so that it is impossible sometimes to separate them. 

 Group 12 is more or less definite, while group 13 always merges 

 with group 14. The total number of pores of all four groups for 

 the third legs varies from 11 to 49; for the second legs, from 5 

 to 46; for the first legs, from 12 to 45. 



