31 
CHAPTER V. 
THORAX, LEGS, AND WINGS. 
Formed of Three Paj'ts — Muscles — Legs — Joints — Claws — A7t- 
tefuuz Cleaner — Seco7id Leg Spur — Pollen Basket a7id Bmish 
— Pincers — Coinparison of Legs of Drojie, Queen ^ aiid Wo^Ler 
— Loco7notio7i — Pidvillus — Adhesio7i to Sniooth Surfaces — 
Meth od of Exa ffi hi mg — W mgs — Ha irs — Nervures — Cells 
— Hooklets — Method of faste7iing Anterior a7id PosteriorWhigs 
— How Flight is acco7nplished — Upward^ dow7nmrd, forward^ 
a7id backward Flights — Number of Whig-beats demoiistrated 
by graphic Method — Tracheal Distension — Specific Gravity 
altered — Muscles. 
The thorax is that part of the body of the bee 
which gives origin to the legs and wings. It is formed 
by the three segments which follow the head. The 
second and third rings support the wings. The 
presence of legs and wings involves a considerable 
development of the segments of the thorax, and par- 
ticularly of the second and third, for there must be 
abundance of space within for the passage and attach- 
ment of the powerful muscles (Fig. 21), which, influ- 
enced by the will of the insect, move the legs and the 
organs of flight. 
The first segment of the thorax, that which is 
nearest to the back of the head, is called the pro- 
thorax ; the second, to which the first pair of wings is 
attached, is the tneso-thorax ; and the third, bearing 
the second pair of wings, is the tneta-thorax. 
