Manchester Memoirs, Vol. xli. (1897), No. 4. 97 



forming almost reticulations ; at the apex in the middle 

 is an area broad and rounded at the base, becoming 

 narrowed towards the apex ; forming an almost pyriform 

 space ; there is an oblique, somewhat similar, area at its 

 side at the top ; the rest has four stout slightly oblique 

 keels, running from the centre. Pro- and meso-pleurse 

 coarsely strongly punctured, running into strong reticula- 

 lations at the apex ; the metapleurae coarsely strongly 

 punctured ; the base coarsely obliquely striated ; the 

 punctures at the apex large, round. Legs black ; the 

 apices testaceous ; the femora sparsely, the tibiae, and 

 especially the tarsi, covered with silvery white pubescence. 

 The first and second transverse cubital nervures are 

 bullated at top and bottom ; the first recurrent nervure is 

 received quite close to the transverse cubital 5 the second 

 shortly before the apical third of the cellule. Abdomen 

 shining, the basal three segments punctured ; the apical 

 smooth and shining ; the ventral segments shining, 

 broadly ferruginous in the middle; the third ferruginous 

 in the middle. 



Halictus serenus, sp. nov. 



Niger; abdominis basi late rufo ; alts hyalinis, nervis 

 testaceis. d 1 . Long. 5 mm. 



Hab. Mussouri (Rothney). 



Head finely punctured, thickly covered with long 

 white hair ; the mandibles before the apex ferruginous ; 

 beneath with some long golden hairs. Antennae stout, 

 the scape with some long white hairs ; the flagellum 

 almost bare. The base of the median segment w r ith its 

 area irregularly striolated ; the lateral striations on it 

 straighter and more widely separated; the apex hollowed, 

 smooth, impunctate at base, the apex rough, but without 

 any distinctly defined keels. Pleurae strongly aciculated, 

 covered with long white hairs ; femora clothed with some 

 long white hairs ; the tibiae and tarsi more thickly with 



G 



