BEES OF GREAT BRITAIN. 85 



be the male of the A. rufit arsis of Zetterstedt, but the descrip- 

 tion of that sex, as given'by Nylander, is not sufficiently detailed. 



42. Andrena frontalis. 



A. nigra, nitida, cinerascenti-pilosa ; clypeo albo; pedibus nigris. 

 Andrena frontalis, Smith, Zool. vii. App. p. 59. 



Mdle. Length 4 lines. Black ; the head wider than the thorax, 

 the clypeus white, and having on each side an angular black 

 spot ; the face has a thin griseous pubescence. Thorax shining, 

 and having some scattered punctures, at the sides a thin grise- 

 ous pubescence ; the wings subhyaline, iridescent, the nervures 

 ferruginous ; the legs have a glittering hoary pubescence, the 

 claws ferruginous, the calcaria pale testaceous. Abdomen ovate- 

 lanceolate, punctured and glossy ; the margins of the interme- 

 diate segments depressed and rufo-testaceous ; the extreme 

 apex covered with pale glittering pubescence : beneath, the 

 third, fourth and fifth segments are ciliated with short fulvous 

 hairs ; towards the base, rufo-piceous. 



This species most closely resembles the male of A. awa&s,but 

 may at once be distinguished by its black posterior tarsi and the 

 fulvous cilia on the ventral segments. Mr. Samuel Stevens took 

 this insect in Devonshire. 



43. Andrena Aprilina. 



A. nigra; thorace fulvo-piloso ; abdomine nitido, segmentorum 

 marginibus testaceis ; tarsis ferrugineis. 

 Andrena Aprilina, Smith, Zool. vi. 2211. 



Male. Length 4| lines. Black ; the clypeus clothed with 

 brown pubescence, at the base of the antennae and on the 

 vertex it is fulvous ; the antennae a little shorter than the tho- 

 rax, the joints subarcuate. Thorax clothed with fulvous pubes- 

 cence, sparingly so on the disk, and palest at the sides of the 

 irietp.thorax ; the wings subhyaline, their nervures testaceous ; 

 the legs have a fulvous pubescence, the tarsi ferruginous. Ab- 

 domen oblong-ovate, shining, the margins of the segments 

 piceous, the second and third depressed; all the margins thinly 

 fringed with fulvous pubescence; the extreme apex covered 

 with fuscous pubescence. 



This species is in the collection of Mr. Dale, of Glanvilles 

 Wootton. 



