192 



MR. F. E. BEDDARD ON 



[June 17. 



75 fully matui-e examples of this species and found some varia- 

 tions in the extent of these lateral folds surrounding the genital 

 area. The prevalent arrangement was that the aiea ended upon 

 the xxivth segment ; 29 specimens exhibited this character. But 

 in nearly as many (24) these folds ceased to exist upon the 

 xxiiii'd segment. In 18 examples the folds were more extensive, 

 reaching to the xxvth segment. The extreme in this direction 

 was shown by one specimen only, where the groove extended as 

 far as the xxvith segment. On the other hand, in thiee speci- 

 mens this genital area stopped short at segment xxii. 



Text-fig. 46 



Text-fie-. 



Text-fig'. U'l. \ I'litial \ iew of anterior segiueiits of Pnlj/foreufns kemjaensis. 

 Text-fig. 47. — Ventral view of anterior segments of an individual of Fol^i/toreutus 



kenyaenais, with shorter perigenital area. 

 Text-tig. 48. — Ventral view of anterior segments of PoJytoreutus montis-kenyce. 

 The segments which hear the pores are nnmhered. 



The single and median male pore is upon segment xvii. 



The single and median spermathecal poie is wider fi'om side to 

 side and lies upon the boundar}^ line of segments xviii./xix. 



As to the internal stiucture, it is mainly the female parts of the 

 geneiative system whicli show difierences from othei- species. 



