The Bumblebees. Various. The Syrphid Flies. 



The Honeybee. 

 Apjs mellifieak 



Bombus vagans. 



Syrpus Lesueurii. 

 Bombus ternanius '^^^^^H^f \ 



(0pan 9 e - bdnd ^Bombyliusfratellur 

 ~>*^ t 



CTh«se two (li'ei much enlarged) 



Polydonta cardus. 



Bombus W9idu^ ed) JWyl.usatneeps. 



*a i.i ii- Helophilus similis. 



I v Megachile latimana. 



Bombus Virgihicus (Leaf-cutter bee) 



-Halictus confusus. 



Bombus tern col a 



Mai lota posticata. 



Andrena vicina. 



Hal fetus &> Andrena 

 are ground bees. 

 Bombus Pennsylvanicus. Syrpus diversipes. 



BUMBLEBEES, BEES, AND FLIES CONCERNED IN THE 

 CROSS-FERTILIZATION OF FLOWERS.' 

 xiv 



