OLFACTORY SENSE OF THE HONEY BEE 313 



sal joint; sometimes only one, either on the second or third joint. 

 These always occur in the clear spot where there are no hairs 

 and just above the nearest place of articulation, one on either 

 side of the median line. 



For the 27 worker legs examined, the total number of pores 

 found on the outer side of all three legs on one side varies from 

 153 to 211, and for the inner side from 107 to 170, giving a vari- 

 ation from 283 to 372 for both sides, or an average of 329. 



Stings of workers. The pores on both sides of the stings of 15 

 workers were counted, and in location and number they vary 

 greatly in group 19. There are usually only a few at the tip 

 of the shaft, while most of them lie at the distal end of the bulb 

 (fig. 14, A, c) and only occasionally are there any pores at the 

 point marked h. Group 20 is constant and definite, with a pore 

 at the base of each of the 10 or 11 barbs. Group 21 is also con- 

 stant and definite, but may vary in number of pores from 6 to 

 12, with 9 as an average. Sometimes there are 2 or 3 scattered 

 pores on the oblong plate (fig. 14, A, Oh). For the 15 stings 

 examined, the number of pores on both sides varies from 84 to 

 128, with an average of 100. 



On the four wings, six legs, and the sting of an average worker 

 bee there are 2268 pores. 



Wings of queens. On the wings of queens group 1 varies from 

 200 to 249 pores, with an average of 225; group 2, from 42 to 51, 

 with 47 as an average; group 3, from 141 to 156, with 148 as an 

 average; group 4, from 61 to 85, with an average of 72; and group 

 5, from 144 to 176, with 163 as an average. To obtain these 

 numbers five examples each of groups 1 to 3, 6 of No. 4, and 

 3 of No. 5 were counted. On the front wing there are 420 and 

 on the hind wing 235 pores, making an average of 1310 pores 

 for all four wings of a queen. 



Legs of queens. On the legs of queens group 6 is double in 

 every instance and it is always present on the outer side in all 

 three legs. On the third legs it varies in number of pores from 

 15 to 20, with 18 as an average; on the second legs, from 16 to 

 21, with an average of 17; on the first legs, from 15 ^q jg y^\\u 

 an average of 17. 



THE JODRXAL OF EXPERIMENTAL ZOOLOGY, VOL. 16, NO. 3 



