BEES OF GREAT BRITAIN. 87 



not distinct, but it differs in several particulars from the usual 

 appearance of the insect; it is the var. a. I have frequently 

 captured the sexes in coitu. 



45. Andrena extricata. 



A. nigra, grisescenti-villosa ; abdomine fasciis tribus albis; tibi- 

 arura posticarum scopa fulva. 

 Andrena extricata, Smith, Zool. vii. App. 59. 



Female. Length 5 lines. Black ; the face clothed with short 

 pale fulvous pubescence, on the vertex it is fulvous. Thorax 

 clothed with pale fulvous pubescence, that on the legs is of the 

 same colour, the apical joints of the tarsi rufo-piceous, the 

 claws ferruginous; the floccus yellowish-white, the scopa ful- 

 vous ; the wings hyaline, their apical margins faintly clouded, 

 the nervures ferruginous. Abdomen closely punctured, the 

 basal and three following segments hare a white marginal fascia, 

 the first more or less obliterated, the apical nmbria fuscous. 



Male. Length 4 lines. The face has a bright fulvous pubes- 

 cence, on the vertex it is fuscous ; on the thorax and legs it is 

 pale fulvous, the apical joints of the tarsi ferruginous ; the 

 wings hyaline, the nervures pale ferruginous. Abdomen ovate- 

 lanceolate, very glossy, the segments have white marginal fasciae, 

 the apex fulvous. 



This very closely resembles the preceding species, and it is 

 difficult to point out more than what might constitute a perma^ 

 nent variety, but it has not occurred near London, where A.ful- 

 vicrus abounds ; the male is most distinct ; the difference in 

 colour is not the effect of exposure, the specimens described 

 being in the most recent and beautiful condition. 



This insect has been met with in the north of England, and 

 examples have been taken at Weymouth, Dorset. 



46. Andrena polita. 



A . nigra, fulvo-pilosa ; thorace rufescenti-piloso ; tibiis tarsisque 

 posticis, atque abdominis apice fulvis. 

 Andrena polita, Smith, Zool v. 1733. 11 <? ? . 



Female. Length 5 lines. Black ; the face thinly clothed with 

 fulvous pubescence, the flagellum fulvo-piceous beneath. Tho- 



