THE POPULAR INSECT PLAN 



207 



is found an adliesive organ that enables the animal to hold fast to 

 slippery surfaces. 



Each pair of legs bears different structures which are of use in pollen 

 gathering and the making of wax. The anterior pair of legs has along 

 the anterior margin of the tibia a fringe of short, stiff hairs, eye brushes, 

 used for cleaning pollen or other materials from the compound eyes. 



femsxr:.,/^ 



coxa 



Spina of the 

 cl«aner 



front ^ 

 of vorker 

 'hDneyb<?e- 



g.... tibia 



eyebmsbes 



> tarsus 



^-articularis 



■poiten 

 cojtib 



middle leg' 

 of worker 

 honey beer- 



„f)dten Ijasket 

 vnelatorsxTS 



hind leg" 

 o^-workei" 

 Money bee 



-^lanta. 



inner .surf a<ie 

 ofmatatarsus 

 of hincC le^ 



These appendages are used for more purposes than locomotion. Find all the 

 adaptations shown and give the use of each adaptation to the bee. 



The first joint of the tarsus is provided with long hairs which form a 

 pollen brush. This is used to collect pollen grains scattered over the 

 hairs of the body. At the base of the first joint of the tarsus is a 

 semicircular notch lined with short, stiff bristles, while a flat spur 

 projects from the distal end of the tibia. This apparatus is the 

 antennae cleaner. To accomplish this function the front leg is ex- 

 tended with the notch placed at the base of the antenna, which 

 when drawn backward through the notch is effectively cleaned of 

 pollen. 



The middle pair of legs is not so highly specialized as the anterior 

 pair. There is a large spine near the outer end of the tibia which is 

 used as a pick for removing flakes of wax secreted from the wax pockets 

 located under the abdomen. The flattened basal segment of the 

 tarsus is called the planta. Its hairy surface is used for brushing 

 pollen from the body hairs. 



The hind legs are larger and broader tlian the two anterior pairs. 

 They carry most of the pollen gathered from flowers to the hive. 

 The slightly concave outer surface of the tibia, called the pollen 

 basket, is lined by long outward-curving hairs, and may often be seen 



