ENTOMOLOGY

(Yunanca köken — orijinale bakınız.) The science of insects: the history of the organization, habits, properties, and cla ification of those articulated animak which are distinguished by the presence of antennjK and of breathing organs, composed of ramified tracheae with or without air-sacs. The name insect, from its etymological signification of an animal insected or divided into sections, is applicable to the greater part of the Articulate sub-kingdom, but is now restricted to those species characterized as above. The presence of highly developed organs for breathing air, together with peculiar and complex organs of sensation, is a ociated, as might be expected, with active powers of locomotion; and most insects, besides having articulated II. Ptilota. Wings, but sometimes not developed as such; two compound eyes, to which in many are added simple eyes. A. Two wings covered by two elytra, either crustaceous or coriaceous. a. Mandibles and maxillae; elytra of the same consistence. 4. Coleoptera. 5. Derm apter a. 6. Orthoptera. b. No mandibles nor maxillae; mouth haustellate, composed of an articulate sheath, including four setae; elytra membranous at their extremity in most. 7. Hemipter a. B. Wings four, or two; not covered by elytra. a. Mandibulate; wings four, membranous, and generally transparent; a small scale (tegulum) at the base of the two anterior wings. [s. 415]