542 MR. H. N. RIDLET ON THE 



It plays a very important part in the fertilizatioii of the flowers, 

 especially the Cucurbitaeeae. 



30. Haltctus ljetipyga, u. sp. 



Female. Long. Corp. 10 niillini. ; exp. al. 10 niillim. 



Head and thorax daik gi'een, slightly bron/.ed ; abdomen 

 shining, shading into violet at the extremity of the segments ; 

 wings hyaline ; legs black, clothed with pale hairs. 



Head and face finely aud closely punctured, sparingly studded 

 with whitish hairs, dark green, occasionally shading into bronzy 

 or violet in certain lights ; clypeus green or violet-black, with 

 much larger and fewer punctures than the upper part of the 

 head ; the extremity and the labrum black, the lower mouth- 

 parts dull bronzy green ; antennae black, ferruginous towards the 

 extremity beneath ; thorax dark green, thickly punctured, most 

 finely on the jDrothorax, which shades into bronzy ; metaiiotum 

 and base of abdomen above densely clotlied with whitish hairs ; 

 metanotum with longitudinally diverging striae in front, behind 

 deeply and longitudinally concave, with small punctures, the 

 intermediate spaces still more finely punctured ; tegulse tes- 

 taceous ; wings hyaline, with brown nervures and a slight violet 

 iridescence ; pectus dull green, densely clotlied with whitish 

 hairs ; propectus violet-black ; legs black, with whitish hairs 

 above, and the tibiae and tarsi densely clothed with red hairs 

 beneath ; the knees (very narrowly), spines, and last joint of the 

 tarsi mostly reddish. Abdomen smooth and shining, the punc- 

 tuation being extremely tine, even under the microscope, and 

 densely clothed with short white hairs, except towards the 

 extremity of the first two segments ; the segments greenish in 

 front and violet-black behind ; towards the extremity the lateral 

 bristles are longer ; under surface of abdomen brown, the ex- 

 tremities of the segments slightly reddish. 



31. Halictus alteenipes, U. SJ). 



S $ . Long. corp. 11 millim. ; exp. al. 13-14 millim. 



Head and thorax dark green above ; abdomen green, smooth 

 and shining, the neighbourhood of the incisions more or less 

 violet ; wings hyaline, or slightly clouded in and below the radial 

 cell, and towards the extremity of the discoidal cell of the hind 

 wings ; legs reddish, the femora and tibiae in the middle, and often 

 the last joint of the tarsi dark green or blackish ; clypeus tipped 



