231 
anatomy of the mole^cricket. 
the general character of those means by which nature usually 
produces its effects ; there is too little of art and contrivance, 
if I may use such terms, on such an occasion, in the mode 
supposed to be employed. Even in the formation of mineral 
crystals, which are unorganized bodies, the attraction by 
which the component particle are aggregated is regulated 
by laws, the most systematically framed and observed : and 
whoever has viewed with any attention that wonderful mo- 
nument of human industry and sagacity, the Anatomical 
Museum of John Hunter, and has there seen the proofs of 
a sanguineous circulation in animals of an order so low, that 
they can hardly be said to have any specific form or sub- 
stance, will almost necessarily be disposed to expect a simi- 
lar provision in a class of animals, whose general structure 
is so elaborately and beautifully organized as that of insects. 
But I shall again advert to this subject after having described 
the tracheal system or respiratory organs of the insect under 
consideration. 
The organs of respiration. As it is very generally known 
that the atmospherical air, so necessary for the existence of 
all animated beings, is admitted into the bodies of insects by 
certain apertures called stigmata, and is then distributed 
through the system by means of tracheae or air tubes, I 
shall not dwell longer on the description of those organs in 
the gryllotalpa than is necessary for the elucidation of its 
particular history. 
Omitting the questionable existence of two stigmata in the 
upper lip, and of two others in the vicinity of the caudal 
antennae, there are ten stigmata very distinctly visible on 
each side of the body.* Hence, therefore, it is necessary to 
♦ Vide fig. 10. 
