270 the entomologist. 



28. Halictus leucopus. 

 Melitta leucopus, Kirby, Mon. Ap. Angl. ii. 59, male. 

 Halictus leucopus, Smith, Brit. Bees, p. 39, male, female ; 



Nyland. Apum Boreal, p. 247. 

 Hylaeus Morio, Schenck, Bees Nassau, p. 271. 

 H. leucopus is a local species, but plentiful where it 

 occurs : its female has the head much more rounded than H. 

 aratus or H. Morio. I have the sexes taken in coitu. 



Proposed Arrangement of the Species of Halictus, 

 1. Halictus rubicundus, Christ. 



