BEES OF GREAT BRITAIX. 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 JB. rnus- 

 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 closelv 

 resemble the female, but in var. ^3, 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. Bombus Smithianus. 



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

 centi, basi anguste nigro. 



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

 Kirbyj Parry^s 1st Voi/,). 



Zetf, Ins, Lapp, p, 476. 13. 



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



Bombus Smithianus, White, Proc. Linn, Soc, 1851 ; Ann. 8f May. 

 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 maro-in 

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

 tennse. 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. 



Var. /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 antennse as long as the thorax; the posterior tibi^ 

 have a pale fringe above. B.M 



