50 BEES OF GREAT BRITAIN. 



mens of the same species from one locality being highly coloured, 

 whilst those from another have all a tendency to a sombre colour- 

 ing ; those species which have fulvous, or yellow pubescence, 

 are much changed by exposure to light, so much so, that a 

 bright fulvous insect becomes quite grey, or cinereous ; it must 

 therefore be borne in mind, that the individuals described are 

 only such as are in fine condition. 



The genus Andrena contains several species which, in the 

 neuration of the wings, differ somewhat from that of the type ; 

 these will be found to agree with the second type of neuration, 

 in which the first recurrent nervure is received by the second 

 submarginal cell, towards the second transverse cubital nervure ; 

 that is to say, beyond the middle. The following species belong 

 to it: A. pilipes, varians, helvola, fucata, Clarkella, fulva, 

 Lapponica, Smithella, denticulata, and argentata> 



Div, I. The abdomen in one or both sexes usually more or 

 less red. 



1, Andrena Hattorfiana. 



A . atra, glabriuscula ; abdomine nigro, cingulo antico rufo ; ano 

 scopaque fulvis. 



Nomada Hattorfiana, Fabr. Ent. Syst. ii. 349. 14 ? . 

 Andrena equestris, Panz. Faun. Germ. 46. 17. 

 Andrena Hattorfiana, Fabr. Syst. Piez. p. 325. 14. 



Spin. Ins. Lig. fasc. i. p. 121. 7. 



St. Farg. Hym. ii. 254. 25 ^ $ . 



Nyland. Ap. Boreal p. 208. 1. 



Melitta Lathamana, Kirby, Mon. Ap. Angl. ii. 83. 38 ^ . 

 Melitta haemorrhoidalis, Kirby, Mon. Ap. Angl. ii. 141. 81, var. ? . 

 Andrena 4-punctata, Fabr. Syst. Piez. p. 324, 11 $ . 

 Andrena haemorrhoidalis, Smith, Zool. v. 1664. 1. 



Female. Length 6-8 lines. Black; the face thinly clothed 

 with a short griseous pubescence, and having a fine yellowish 

 pile close to the inner margin of the eyes ; the flagellum rufo- 

 piceous beneath. Thorax shining, finely punctured ; the sides 

 and the metathorax have a long, loose, sparing pubescence ; 

 the wings fulvo-hyaline, their apical margins have a fuscous 

 cloud ; the tegulse and nervures ferruginous ; the legs have a 

 pale fulvous pubescence, the floccus being the palest ; the scopa 

 fulvous, the calcaria pale testaceous, the tarsi ferruginous. 

 Abdomen ovate, subdepressed ; the first, second, and apical 

 margin of the third segment, ferruginous ; sometimes the basal 



