The Bumblebees. Various. The Syrphid Flies. 



The Honeybee. Epistalis flavipes. 

 Bombus. vagans. A P is ^ellifica. 



IVT i -t i i- Helophilus similis, 



, ... -i rlegachile latimana. 



bombus Vipgimcus. (Leaf-cutter bee) 



Hal ictus confusus. 



Bombus 



Mai lota posticata. 



Andnena viciha. 

 Halrctus&Andrena 



v ]m 



are ground bees. 

 Bombus PennsylvanicusL Syrpus divers! pes. 



BUMBLEBEES; BEES, AND FLIES CONCERNED IN THE 

 CROSS-FERTILIZATION OF FLOWERS. 



