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TEXT-BOOK OF ENTOMOLOGY 



adaptations for that end are the bristles or spinules on the legs, 

 especially the tibiae. 



Osten Sacken states that among Diptera the aerial forms (Bomby- 

 lidae, etc.) with their large eyes or holoptic heads, which carry with 



FIG. 105. Foot of honey-bee, with the pulvillus in use : A, under view of foot ; /. f. 3d-.">th 

 tarsal joints; an, unguis ; fh, tactile hairs; j>r, pulvillus; cr, curved rod. />', side view of foot. 

 C, central part of sole ; jid, pad ; cr, curved rod ; pv, pulvillus unopened. After Cheshire. 



them the power of hovering or poising, have weak legs, principally 

 fit for alighting. On the other hand, the pedestrian or walking 

 Diptera (Asilidae, etc.) " use the legs not for alighting only, but for 

 running, and all kinds of other work, seizing their prey, carrying 



FIG. 100. Modifications of the legs of different l>ees. .1. Apis: a, wax-pincer and outer 

 view of hind lef.' : />. inner aspect of wax-pincer and lejr, with the nine pollen-brushes or rows of 



