MANUAL OP THE APIAKY. 



93 



the end of the body. These organs (Fig. 3), as in all insects 

 with rapid flight, are slim and strong, and, by their more .or 

 less rapid vibrations, give the variety of tone which charac- 

 terizes their hum. Thus we have the rapid movements and 

 high pitch of anger, and the slow motion and mellow note of 

 content and joy. 



On the outside of the posterior tibia and basal tarsus is a 

 cavity, made more deep by its rim of hairs, known as the pollen 



Fig. 22. 



Part of Posterior Leg of Worker, outside, much magnified. 



t— Tibia. 



h— Rim of hairs. 



p— Pollen basket. 



t s— Joint of tarsi. 

 c—Claws. 



basket (Fig. 22, p). In these pollen baskets is compacted the 

 pollen, which is gathered by the mouth organs, and carried 

 back by the four anterior legs. Opposite the pollen baskets 

 are regular rows of golden hairs (Fig. 23, e), which probably 

 aid in storing and compacting the pollen balls. 



On the anterior legs of the workers, between the femur and 

 tibia, is a curious notch (Fig. 24, C), covered by a spur (Fig. 24, 



