OF INSECTS. 
197 
From the free movements of the legs, and the 
number of separate pieces entering into their compo- 
sition, it may ho presupposed that they have obtained 
a large supply of muscular power. The coxse receive 
the greatest number of muscles, especially if of a 
globose form, and performing a rotatory movement 
upon their axis. Four extensors and a flexor, accord- 
ing to M. Strauss, is the complement of the anterior 
and posterior coxee of the common cockchafer, and 
three flexors and two extensors of the middle coxae. 
The muscles of the trochanter are inserted in the coxae, 
and, like those of the latter, vary in number. In the 
insect just named there are three extensors and a 
flexor for those of the anterior legs, and only a single 
flexor and extensor for each of the others. The thigh 
is moved by two muscles, and the tibia by a like 
number, the tarsus by two general ones, and a pair 
appropriated to each separate articulation. The last 
joint has two peculiar ones which act upon the claws. 
The muscular apparatus of the abdomen is much 
more simple than that of any of the other primary 
divisions of the body. It consists chiefly of a series 
which serve to unite this part with the thorax, and 
of another designed to maintain the connection of the 
different segments with each other. They are in 
general broad flat ribbons, rather thin and deprived 
of tendons. The organs of generation, owing to the 
complicated movements they perform, necessarily em- 
ploy a great number of muscles, which assume as 
great a variety of forms as the organs themselves, and 
of which, therefore, it would be unsatisfactory to at- 
