Miss Staveley on ike Form of the Pecten in Bees. 153 



In some, as Andrena nitiday $ (figs. 3, 4), the direction of the 

 teeth is reversed in the course of the row. The row of hairs is 



figured by Kirby in his work on * British Bees/ at t. 1 . f. 4 e, and 

 called by him, in the explanation of the plates at page 226, " setce 

 rigidiusculce ; " but I do not find any mention of them in any other 

 part of the work. 



In the Apidce it is invariably at the upper part of the lower joint 



