XIV INDEX TO PLATES. 



Fig. 2. Portion of the cornea, showing the lensea, 

 with subjacent colouring-matter. 



Fig. 3. Section of the eye, showing the arrangement 

 of the lenses and nerves. 



Fig. 4. Simple eyes {stemmata) : a, lens, behind which 

 is seen the optic nerve. 



Fig. 5. Portion of cornea, showing circular and hex- 

 agonal facets. 



Fig. 6. Papillae, or bulbous expansions of optic nerve 

 of the stemmata. 



Pl. V page 38 



Fig. 1. Head of the Bee, mounted for microscopic in- 

 vestigation : a, antennae or feelers ; 6, h, man- 

 dibles, or first pair of jaws ; c, c, maxillae, or 

 second pair of ditto ; c', c', ribs of maxillae ; 

 d, ligula, or tongue ; d', terminal disc of 

 tongue ; e, labial palpi. 



Fig. 2. Antenna : a, the large second joint. 



Fig. 3. Portions of antenna highly magnified, showing 

 " sensory organs " and nerves (a). 



Fig. 4. Portion of segment still more highly magni- 

 fied, showing sensory organs. 



Fig. 5. Part of the wings : h, anterior wing with bar, 

 to which the hooks of the posterior wing 

 adhere. 



Pl. VI 46 



Fig. 1. Hind leg of Worker-bee : a, coxa, or hip ; h, tro- 

 chanter; c, femur; d, tibia; e, e', tarsus 

 e', last joint of tarsus, provided with claws ; 

 _;, junction of tibia and tarsus (pollen-basket). 



Fig. 2. PoUen-basketmagnified,showingthe prongs, a'. 



Fig. 3. Last joint of tarsus magnified, showing claws 

 and cup-shaped cushion, a. 



Fig. 4. Fore and hind wing with booklets, h. 



