8 THE SOLITARY GROUPS 



or branched on some part of the body and 

 the hind legs of the females in most species 

 are provided on the tibia or shin with a special 

 brush on which pollen may be collected. In 

 some of the long-tongued bees, however, this 

 brush occurs on the underside of the body instead 

 of on the tibia. The pollen-collecting arrange- 

 ments of the different genera of the Anthophila 

 and the corresponding organs for cleaning off 

 the pollen again are amongst the most interesting 

 instances of modification and adaptation : some 

 of the more striking of these will be mentioned 

 later on. (See pp. 65 sqq.) 



