The entomologist's text book : an introduction to the natural history, structure, physiology and classification of insects, including the Crustacea and Arachnida . ttle to interest the general reader, I shall nothere detail II. (Pi<pi/)«ra; Homaloptera, Leach). Headimmersed in the front of the thorax; sucker inclosedin two valves; claws with many teeth. The transform-ations to the pupa state undergone in the bodyof the parent fly. Fam. 1 {Hipposcidce). Head 2 {Nycterihiidce). Head dorsal. ORDER XII.—APHANIPTERA (Kirby; Siphonaptera,Latreille; Suctoria, De Geer; Apt
The entomologist's text book : an introduction to the natural history, structure, physiology and classification of insects, including the Crustacea and Arachnida . ttle to interest the general reader, I shall nothere detail II. (Pi<pi/)«ra; Homaloptera, Leach). Headimmersed in the front of the thorax; sucker inclosedin two valves; claws with many teeth. The transform-ations to the pupa state undergone in the bodyof the parent fly. Fam. 1 {Hipposcidce). Head 2 {Nycterihiidce). Head dorsal. ORDER XII.—APHANIPTERA (Kirby; Siphonaptera,Latreille; Suctoria, De Geer; Aptera, MacLeay).This order consists of the various species of fleas which in-habit the bodies of man and various animals and birds, inwhich the body is of small size, clothed with a hard shiningintegument, armed with sharp bristles arranged in transverse series upon the backand legs. It is verymuch compressed andapterous ; at least rudi-ments only of wings andwing-cases exist in theshape of two flattenedplates, on each side ofthe body, near the baseof the posterior mouth consists ofthe six ordinary parts, but is of an elongated suctorial form, o o. The flea (Pulex irritans). 422 ORDERS OF PTILOTA. provided at the base with two articulated organs, which havebeen regarded as antenna?, but which are the maxillary palpi;the true antennae being lodged in a ca\ity behind the eyes;the legs are strong, and formed for leaping to a great dis-tance ; the tarsi are five-jointed. The flea undergoes a series of transformations as strikingas those of the bee or beetle. From the eggs are hatchedlong worm-like grubs, which twist about in all directions, andwhich, having attained their full size, form for themselvessilken cocoons, in which they become incomplete pupae, havingthe rudiments of all the limbs of the future insect visible. Having arrived at the perfect state, they commence theirattacks upon us or upon our animals, as well as pigeons,swallows, &c. The Jigger {Pulex penetrans
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Keywords: ., bookau, bookcentury1800, booksubjectcrustacea, booksubjectinsects
