INDEX TO PLATES. 



Pl. I. Frontispeece. 



Pl. U page 1(3 



Fig. 1. Worker-bee : a, head ; h, thorax ; c, abdomen. 

 1, 2, 3, legs ; 4, 5, wings ; 0, antennae ; 

 7, sting. 

 Fig. 2. Queen-bee : a, b, c, head, thorax, and ab- 

 domen; o, sting. 

 Fig. 3. Drone : the letters as in fig. 2. 



Pl. m. 20 



Fig. 1. Head of Worker-bee : u, a, compoimd eyes ; 



h, h, h, simple eyes ; c, antennae ; d, closed 



mandibles. 

 F^. 2. Lateral view of abdomen. 

 Fig. 3. Ventral view of ditto. 

 Fig. 4. Grastric teeth of Worker. 



Pl. R' -28 



Fig. 1. Portion of compound eye of Bee : a, a, a, cor- 

 neal lenses; l\ and 12, their component 

 lenses ; 6, b, conical lenses ; c, c, intermediate 

 spaces (diaphragm) ; d, d, d, pigmentum ni- 

 grum (dark colouring-matter for isolation of 

 lenses) ; e, e, e, expansions of optic nerves. 



