ELEMENTS 
OF 
ENTOMOLOGY. 
So great is the number of natural bodies on the face of our earth, 
that on a general view the mind recoils at the attempt to investigate 
them as impossible. But the invention of systems has facilitated the 
task ; and every natural object can be traced by certain characters to 
its place in the system, whether natural or artificial. 
Those who with a philosophical eye have contemplated the produc- 
tions of Nature, have all by common consent divided them into three 
great groups; namely, the Animal, the Vegetable, and the Mineral 
kingdoms. 
Animals are distinguished by being organized bodies, which have 
life, sensation, and arc capable of voluntary motion. 
Vegetables are organized bodies, which are endowed with a living 
principle but want sensation. 
Minerals are unorganized, without life or sensation. 
Zoology, or the study of Animals, is not only the amplest and most 
difficult, but the most pleasant and profitable part of Natural History. 
The following is the system of the celebrated Linne. 
Division 1. A heart with two auricles and two ventricles; rearm and red 
blood. 
Class I. Mammalia. Viviparousanimals,orsuch as suckle theiryoung. 
Class II. Aves. Oviparous animals. Birds. 
Division 2. Heart with one auricle and one ventricle; cold and red blood. 
Class III. Amphibia. Animals breathing arbitrarily through lungs. 
Class IV. Pisces. Animals with gills. Fishes. 
Division 3. Heart with one ventricle, no auricle; white and cold blood. 
Class V. Insecta. With antennas, and undergoing transformations. 
Insects. 
Class VI. Vermes. With tentacula, and undergoing no change. Worm*. 
