AXDRENID.E. 297 



is paler, the Labrum has two dark spots, the tubercles of the 

 prothorax are flavous, the mesouotum much less hairy, the 

 abdomen entirely pale brown except the base and extreme 

 apex of the basal segment, which are black, and a small 

 round spot on each side of the second segment, which is 

 yellow, occasionally there is a very minute yellow spot ou 

 each side of the third segment, and a central spot on the 

 fifth of the same colour; posterior tibiis with five rather 

 short piceous spines round the exterior margin of the apex, 

 posterioi' metatarsi black, posterior femora not clothed with 

 bristly hairs. 



L. 8-9 mm. 



Rare. Parasitic on Andrena hucephala. Hampstead ; 

 (Smith). Brundall, Norwich ; {Briilgman). Sudbury, 

 Suffolk ; (ITont'oorf). Northumberland ; (i?oZ(i). Lancashire 

 and Cheshire; {Gardner). Boxhill ; [PerMns). Stoke 

 Newington ; {Mareiltall). 



N. ochrostoma, Kirhy (Hillana, Kirh., vidua, Smith, 

 2>uitctiscuta, Thorns.). — Another of the ruficornis group, but 

 easily distinguished from all the others by the simply trun- 

 cate mandibles. The head and thorax in the c? are black 

 with the mouth parts and cheeks yellow, the scape of the 

 antenna testaceous ; in the ? the mouth parts are ferru- 

 ginous, and the mesonotum is striped with ferruginous, 

 the sides of the vertex and the cheeks behind the eye and 

 a large spot on the mesopleura; are also of the same colour, 

 the tegulse and tubercles in both sexes are testaceous, in 

 the ? the puncturation of the mesonotum, and especially of 

 the scutellum, is much coarser than in rvficornis ; the latter 

 is red or spotted with red in both sexrs ; abdomen pale 

 brown ($, reddish brown ? , its base black in both sexes, all 

 the segments except the basal with lateral yellow spots, 

 the apical margin more or less black, the black colour 

 widening laterally, and occupying the base of the following 

 segment, in the ? the spots on the second segment are 

 round, and very near the lateral margin, those of the third 



