viii CONTENTS. 



PAGE 



Fourth Class of the ARTICULAT A INSECTA, the Insects . 68 



First sub-class Insects without a metamorphosis = AMETABOLA . . 75 



First and only Order APTERA, Wingless Insects . . .75 



First Family PEDICULIDA, Lice . . . 76 



Pediculus Capitis, the common Touse . .76 



Pediculus Vestimenti, the body-louse . . 81 



Second Family PHTHIRIUS, Crab-louse . . . .82 



Phthirius Pubis, the common crab-louse . . 82 



Second Sub-class Insects with an incomplete metamorphosis = HEMIMETABOLA 84 



Order K.HYNGOTA = HEMIPTERA. . . . 84 



Fifth Family GEOCERES, Land-bugs . . . .85 



Third Sub-family ACANTHIDA, Soft-bugs . . 85 



Acanthia lectularia, the common Bed-bug . . .85 



Third Sub-class Insects with a complete metamorphosis = HOLOMETABOLA . 87 



Order DlPTEEA two-winged flies . . . . .87 



Sub-order APHANIPTERA 



First and only Family PULICIDA, the Fleas . . 88 



Pulex irritans, the common flea . . . .89 



Pulex penetrans, the land-flea . . . . . 91 



Sub-Order BRACHYCERA, true Flies . . . . -92 



Family of Bot-flies (ESTRIDEA . . . . . 92 



Family of the Flies Muse ID A . . . . .95 



Anthomycida, Flower-flies . . . . . . 95 



Creophila, Flesh-flies . . . . .96 



Musca vomitoria, the great Blue-bottle . . . . 97 



Musca carnaria, the common Flesh-fly . . . 98 



The larvae of Musca domestica and M. stabulans . . . 98 



Sub-Order NEMOCERA. . . . . . .99 



Tipulida, Gnats . . . . 99 



Simulida, Mosquitos ..... 99 



Doubtful Parasites . . . . . . . 100 



Dactylius aculeatus . . . . .100 



Spiroptera Hominis . . . . . . 100 



Diceras rude . . . . . .100 



Diacanthus polycephalus . . . . . ' . 100 



