22 



GENERAL BIOLOGY 



sap. 

 Its 



piercing the tissues of plants and sucking out the 

 Only incidentally is it used for gathering nectar. 



very position and direction show it to be 

 unadapted to probing flowers. 



It consists of two pairs of lancet-like 

 org^ans, the modified mandibles and 

 maxillae, enveloped by the sheathing 

 lower lip, which is practically destitute 

 of palpi, and distinctly jointed: the 

 labrum is rudimentary. The accom- 

 panying diagram shows the parts as they 



somewhat separated 



Fig. 16. Diagram of 

 head and proboscis 

 of a bug {Pemato- 

 ma). a, antenna; 

 b, eye; c, labrum; 

 d, lancet-like man- 

 dibles; e, maxillae; 

 /, the jointed en- 

 sheathing labium . 



of the body. 



appear when 



(fig. 1 6). 



Vesture. — 



The parts thus 

 far considered 

 have to do with 

 getting food. 



,Tf^ .-,-, , Fig. 17. Side view of abdomen 



We VAii next of a hee{ Macro pis), show - 



•J -fVi + ^"S ventral pollen brushes. 



which has to do with the distributing of 



pollen, the vesture, or hairy covering 



The horny shell of the insect's body 



if bare would carry 

 little pollen, but the 

 brushes of hairs 

 with which it is 

 usually clothed carry 

 pollen excellently and 

 serve well for mi- 

 planting some of it 

 on the surface of the 

 stiema. 



Fig. 18. Pollen gathering hairs of the honey bee. 



