Fig. 473- 



Our common bumb!e-bees.-a, Xvlocopa virginica : b, Bombus fervidui : c, B. conswiths : d, B. 

 viy^inicu^ ■ e, B. avu-ricanorum (queen) ; /, B. fervidus : g, B. americanoriim (worker), to show 

 pollen m-.ss on hind tibia; A, B. vagans ; i, Apathus elatus. All somewhat more than natural 

 size. 



