64 



Muscles and Nerves. 



uted, though, as we should expect, they are concentrated 

 ill the thorax and head. In insects of swiftest flight, like 



Fig. i6. 



Nervojt^ System nf Dron^ ajler Diniran. 



the bee, the thorax (Fig. 15) is almost entiicly composed 

 of muscles; the esophagus, which carries the food to the 

 stomach, being very small. At the base of the jaws (Fig. 

 39) the muscles are large and firm. The number of mus- 

 cles is astounding. Lyonnet counted over 3,000 in a single 



