ANDRENID.E. 203 



tibiaj, from aj)inis, its slightly larger size, more incrassated 

 vertex, and more distinct dorsal line of the mesonotum will 

 help to distinguish it. 



L. 6 mm. 



I have united divisus v. Hag. to this, as I do not feel 

 that there is character enough to distinguish it specifically 

 even in the (J. 



Woking ; Chobham ; Heme Bay ; Hastings. Seaford 

 (Eamsdeii). Scotland; (Service). Wotton-under-Edge 

 (F.R. Perkins) . ^idmoMth. ; {R, C. L. Perkins) . Eugby 

 (Morice). Colchester; (Harivood). 



S. dimidiatus, v. Hag. — (J, small and narrow, easily 

 distinguished from all but the following species by the 

 form of the antenna3 joints, which have their faces flattened 

 and pubescent almost to the apex of each, from affiiiis the 

 dilated apex of the thickened portion of the lacinia will 

 distinguish it easily. 



? , this sex may be known by the more largely and closely 

 punctured mesonotum, which has a rather deeply impressed 

 dorsal line in front. 



L. 5-6 mm. 



Common, and probably generally distributed. 



S. a£Bnis, v. Hag. — S with the lacinia slightly widened, 

 and produced on to its membrane near the middle, being 

 narrowed again to the apex. 



? with the mesonotum very smooth and shining, tho 

 puncturation very fine and remote. 



L. 5-6 mm. 



Common, and like the last probably generally distributed. 

 I have received it from Scotland and Irclaud. 



HALICTUS, Latr. 



An extensive genus, and amongst the most difficult as 

 regards the discrimination of its species. Structurally it very 



