STRUCTURE OF THE FEET 



115 



as the pulvillus is pressed down ; C and D, Fig. 135, making this 

 clear. The flattened-out pulvillus thus holds strongly while pulled, 

 by the weight of the bee, along the surface, to which it adheres, but 



FIG. 138. Cross-section through a tarsal joint of fore leg of l>yticus, tf, showing the stalked 

 chitinous suckers (*), with a marginal bristle' on each side: t, trachea: a, an isolated tubule or 

 sucker of Loricera, b, of Chleenius, c, of Oicindela ; d, two views of one of Necrophorun 



comes up at once if lifted and rolled off from its opposite sides, just 

 as we should pull a wet postage stamp from an envelope. T^R 

 bee, then, is held securely till it attempts to lift the leg, when 



FIG. 134.- Section through the tarsus of a Staphylinid beetle; the glandular or tenent hairs 

 arising from chitinous processes. A, section through the tarsal joint of the pine weevil, Ilylobiux 

 abietis, showing the crowded, bulbous, glandular, or tenent hairs arising from unicellular glands. 

 This and Fig. 133 after Simmermacher. 



it is freed at once ; and, by this exquisite yet simple plan, it can 

 fix and release each foot at least twenty times per second." (Bees 

 and Bee-keeping, p. 127.) 



Ockler divides the normal two-clawed foot into three subtypes : 



