212 BRITISH BEES. 



face flat ; clypeus transverse, margined ; lubrum trans- 

 verse, slightly rounded in front ; mandibles bidentate ; 

 cibarial apparatus moderately long ; tongue lanceolate, 

 fringed with delicate hair ; paraylossa about one-third 

 the length of the tongue, abruptly terminated, lacerate 

 and setose at the extremity ; labial palpi rather longer 

 than the paraglossse, the basal joint considerably the 

 longest, all the joints subclavate and diminishing both in 

 robustness and length to the apex ; labrum half the 

 length of the entire apparatus, its inosculation acutely 

 triangular ; maxillae subhastate, as long as the tongue ; 

 maxillary palpi six-jointed, less than half the length of 

 the maxillse, the joints short, subclavate and decreasing 

 gradually from the base to the apex. THORAX densely 

 pubescent, obscuring its divisions; metathorax trun- 

 cated ; wings with three submarginal cells, and a fourth 

 slightly commenced, the second subquadrate and receiv- 

 ing the first recurrent nervure in its centre, the second 

 recurrent nervure issuing from beyond the centre of the 

 third submarginal cell; legs all pilose, especially the 

 posterior pair, which have hair beneath the coxes and 

 trochanters, above only on their femorse, but surrounding 

 the tibiae, and as dense externally upon their plants ; 

 claws distinctly bifid. ABDOMEN ovate, truncated at the 

 base, the segments banded at their apex, with decumbent 

 down, which becomes densely and widely setose on the 

 fifth segment, the terminal segment having a central tri- 

 angular glabrous plate, carinated down the centre, and 

 very rigidly setose laterally. 



The MALE scarcely differs, except in having the antennae 



practised with poor Bainbridge's Osmia pilicornis, to which he had at- 

 tached this manuscript name, he being the first to introduce it, having 

 caught it at Birchwood. 



