186 BRITISH BIES. 



frontj and the process rounded ; mandibles obtuse, sub- 

 bidentate ; cibarial apparatus short ; tongue deeply 

 emarginate and bilobate, the lobes fringed with short 

 setse ; paraglossce half the length of the tongue, abruptly 

 terminating and lacerate, and setose at the apex ; labial 

 palpi much shorter than the paraglossse, four-jointed, the 

 joints equal and each subclavate ; labium about the same 

 length as the tongue, its inosculation acutely angulated ; 

 manllm broad, lanceolate, the length of the tongue; 

 maxillary palpi six-jointed, not so long as the maxillse, 

 the two basal joints the longest, the rest equal, short, and 

 subclavate, the apical one rounded. Thorax subquad- 

 rate, very pubescent, the prothorax inconspicuous ; scu- 

 tellum transversely triangular or sevaWu.'o.a.te, postscutellum 

 lunulate; metathorax abruptly truncated, and densely pu- 

 bescent, especially laterallyj for the conveyance of pollen ; 

 wings with three submarginal cells and a fourth slightly 

 commenced, the second and third each receiving about 

 their centre a recurrent nervure ; legs all pubescent, the 

 anterior and intermediate on their external surface chiefly, 

 their plantce also setose ; the posterior coxa, trochanters, 

 femora, and tibice very hirsute, especially beneath, their 

 tarsi entirely setose ; claws bifid. Abdomen truncated 

 at the base, subconical with a downward bias, the seg- 

 ments with bands of closely decumbent nap, and the sur- 

 face of all more or less deeply or delicately punctured ; 

 the basal segment in the centre, beneath, with a longi- 

 tudinal tuft of long hair. 



The MALE differs in having the mandibles more dis- 

 tinctly bidentate, and in being less densely pubescent, 

 especially upon the legs. In general aspect it is very 

 like its female. 



Note. The genus Cilissa has, superficially observed. 



