96 BRITISH BEES. 



or isocheimal lines drawn over the earth's surface. Nor 

 do botanical conditions seem to influence them beyond 

 the probability of their dissemination being restricted to 

 the special diffusion of the families of such plants whose 

 genera and species they frequent with us. 



Thus, inhabiting Northern Europe we find in — 

 Lapland. Cilissa; Anthophora; Epeolus; Megachile; 



Chelostoma; Heriades; Osmia; Apathus; Bombus; 



Apis. 

 Finland. Colletes ; Prosopis ; Cilissa ; Anthophora ; No- 



mada; Epeolus; Stelis; Coelioxys; Megachile; Aa- 



thidium; Chelostoma; Heriades; Osmia; Apathus; 



Bombus; Apis. 

 Sweden. All our genera except Sphecodes; Halictus; 



Macropis; Anthocopa. 

 Denmark. All our genera except Macropis and An- 

 thocopa. 

 Russia. All our genera except Macropis and Anthocopa. 

 The other Northern European Countries. All our genera, 

 with the same exceptions. 



Western, Southern, and Eastern Europe present us 

 with, in — ■ 



France. All our genera. 



Portugal. Prosopis ; Sphecodes ; Andrena ; Halictus ; 

 Eucera ; Nomada ; Anthidium ; Apathus ; Bombus ; 

 Apis. 



Spain. Prosopis ; Sphecodes ; Andrena ; Halictus ; 

 Dasypoda; Eucera; Anthophora; Nomada; Mega- 

 chile ; Anthidium ; Apathus ; Bombus ; Apis. 



Italy. Andrena; Halictus; Panurgus; Eucera; Antho- 

 phora; Nomada; Melecta; Epeolus; Coelioxys; 

 Megachile; Anthidium; Osmia; Apathus; Bom- 

 bus; Apis. 



