CLASSIFICATION OP ANIMALS. 343 



II. Hemiptera ; four wings, either stretched straight out, or rest- 

 ing across each other. 



1 Blatta, cock-roach 3 Fulgora, lantern,fly 



2 Gryllus, locust, grasshop- 4 Cimex, bug, 



per &c. &c. 



III. Lepidoptera ; soft hairy body, and four expanded wings. 



1 Papillo, butterfly 



2 Sphinx, \ 

 3Phala3na, J ,noths 



IV. Neuroptera; four reticulated wings. 



1 Libellula, dragon-fly 2 Ephemera, &c. 



V. Hvmenoptera ; generally possessing a sting. 



1 Vesoa, wasp, hornet 4 Termes, white ant 



2 Api, bee 5 Ichneumon, 



3 Formica, ant &c. 



VI. Diptera; two wings. 



1 CE-.trus, gad-fly 3 Culex, gnat, mosquito 



2 Musca, common flies 4 Hippobosca, horse-leech, &c. 



VII. Aptera; no wings. 



1 P> lura, spring-tail 4 Acarus, tick, mite 



2 P^.iiculus, louse 5 Aranea, spider 



3 Pulex, flea, cliigger 6 Scorpio, scorpion, &o. 



The vermes may be divided into two orders ; the intestinal, which 

 inhabit the bodies of other animals ; and the external. 



The former are not of such a complicated organization as the 

 latter ; so that they are sometimes arranged among the zoophytes. 

 The external worms have a nervous chord possessing ganglia; an 

 elongated body composed of rings ; and have no distinct head. 

 There are no members. Circulating vessels, but no heart. No 

 nerves have been discovered in the intestinal worms. 

 Order I. lntestini. 



1 Gordius, guinea-worm 4 Fascioli, fluke 



2 Ascaris, thread-worm, round- 5 Taenia, tape-worm 



worm 6 Hydatis, hydatid 



3 Tricocephalus 



z4 



