BEES OF GREAT BRITAIN. 215 



the abdomen rather more elongate than in the worker, the ex- 

 treme apex having a mixture of fuscous pubescence. B.M. 



The female of this species is easily distinguished from B. mus- 

 corum ; its general colouring is different ; its thorax has a much 

 more rich fulvous pubescence ; that on the abdomen is paler, 

 and not subject to vary in colouring ; the pale corbicula is also 

 a good characteristic difference. The workers usually very closely 

 resemble the female, but in var. ft. is pointed out a very close 

 approach to the worker of B. muscorum ; this variety is not 

 uncommon at Southend, but it appears to be local. Females 

 received from Perthshire are exceedingly bright in colouring. 



3. Boxnbus Smithianus. 



B. hirsuto-ater; thorace supra fulvo; abdomine supra flaves- 

 centi, basi anguste nigro. 



Bombus arcticus, Dahlb. Bomb. Scand. p. 50. 32. f. 20 ? ? (nee 

 Kirby, Parry's 1st Voy.}. 

 Zett. Ins. Lapp. p. 476. 13. 

 Nyland. Ap. Boreal, p. 228. 2. 



Bombus Smithianus, White, Proc. Linn. Soc. 1851 ; Ann. fy Mag. 

 Nat. Hist. x. new ser. p. 294. 



Female. Length 8-10 lines. The head clothed with black pu- 

 bescence, sometimes with a little pale pubescence on the margin 

 of the vertex, and a few pale hairs at the insertion of the an- 

 tennae. Thorax clothed above with rufo-fulvous pubescence, 

 that on the sides, beneath, and also that on the legs, black. 

 Abdomen : the margin of the basal segment above, and the 

 entire abdomen beneath, have a black pubescence ; the pubes- 

 cence on the second and third segments somewhat rufo-fulvous, 

 that on the following segments paler yellow. B.M. 



Yar. /3. The basal segment with pale pubescence at the sides, 

 the basal margin alone having a few black hairs ; the fringe of 

 the corbicula above more or less obscure fulvous. 



Worker. Length 4-7 lines. This sex exactly resembles the 

 female ; the black hairs at the base of the abdomen are however 

 usually obsolete. B.M. 



Male. Length 6-7 lines. This sex has more or less white pu- 

 bescence on the clypeus, the beard on the mandibles fuscous, 

 and the antennas as long as the thorax; the posterior tibiae 

 have a pale fringe above. B.M. 



