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; Ccelioxys; Megachile; An- 

 thidium; Chelostoma; Heriades; Osmia; Apathus; 

 Bombus; Apis. 



Sweden. All our genera except Sphecodes; Halictus; 

 Macropis; Anthocopa. 



Denmark. All our genera except Macropis and Au- 

 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. 



