CHAPTER VII. 



TONGUE AND MOUTH PARTS. 



Endo-Skeleton of Thorax and Head — Meso-cephalic 

 Pillars — Mouth of Bees — Mandibular, Labrum, and 

 Labium — Mentum not Tubular — Labial Palpi 

 and Maxilla; — How Large Quantities of Honey 

 are Taken — One Use of the Epipharynx — The True 

 Sucking Tube of Bees — Sucking Small Quantities 

 of Nectar — Sheath — Rod — Centre and Side Ducts 

 of Tongue — Bouton — Pouch — Solidity of Tongue : 

 How Simply Determined — Necessity of Pseudo- 

 Tubular Form — How to Distend Pouch Artificially — 

 Queen and Drone Tongue — How Tongue is Folded 

 out of View — Folding by the Andrenidse — Nectar 

 Converted into Honey — Why Bees Take Thick 

 Syrup Slowly — Feeding Brood in Cells — Reasons 

 for Wedge Shape of Head. 



As we now commence another section of our anato- 

 mical studies, leaving the internal organs for those 

 that, in large part, appear at the surface, some intro- 

 ductory remarks are necessary. 



The skeleton of insects, although external, is not 

 exclusively so — e.g., in the thorax of bees, subject as 



