124 



COMPETITION AND CONSTANCY. 



Table 87. — Composition and weight of pollen loads — Continued. 

 Bombus occidentalis — Continued. 



Bombus occidentalis: 

 Cat. No. L 



?10 



?2 



Percentage 



composition 



of load. 



(Delphinium scopulorum 95 



[Composite 5 



M Delphinium scopulorum 85; ?15 



N Delphinium scopulorum 99 ; ? 1 



O Chamaenerium angustifolium 98; ?2 



p /Chamaenerium angustifolium 95 



\Composite 5 



Q Chamaenerium angustifolium 90 ; 



■p /Chamaenerium angustifolium 95 



\ Composite 5 



o j Chamaenerium angustifolium 80 



\Composite 20 



T Carduus hookerianus 98; 



Bombus centralis: 



^ XT TT /Delphinium scopulorum 10 



Cat - No - U \ Composite 90 



Bombus edwardsii: 



Cat. No. V Petalostemon purpureus i 99; 



w /Petalostemon purpureus 90 



\Composite 10 



■^ /Calochortus gunnisoni 40 



(Composite 60 



Bombus fervidus: 



Cat. No. Y Petalostemon purpureus 98; 



Bombus flavifrons: 



p -IJ „ fCalochortus gunnisoni 45 



\ Composite 45 



Chamaenerium angustifolium 10 



Bombus hunti: 



Cat. No. a Chamaenerium angustifolium 75; 



Bombus kirbyellus: 



Cat. No. b Rubus deliciosus 99; 



