A text-book of entomology, including the anatomy, physiology, embryology and metamorphoses of insects, for use in agricultural and technical schools and colleges as well as by the working entomologist . a-; </, penis ; e, vesicula seminalis ;/, ductus glandularis ; i1, divisions of testes. —AfterKenyon. etc.) the silk-glands situated in the last two segments, and whichopen at the end of each cercus. He regarded the form as thetype of a genus or family intermediate between the hexapodLepismid;e and the Scolopendridae. In 1S731 the writer referred to this form as follows: It maybe regarded as
A text-book of entomology, including the anatomy, physiology, embryology and metamorphoses of insects, for use in agricultural and technical schools and colleges as well as by the working entomologist . a-; </, penis ; e, vesicula seminalis ;/, ductus glandularis ; i1, divisions of testes. —AfterKenyon. etc.) the silk-glands situated in the last two segments, and whichopen at the end of each cercus. He regarded the form as thetype of a genus or family intermediate between the hexapodLepismid;e and the Scolopendridae. In 1S731 the writer referred to this form as follows: It maybe regarded as a connecting link between the Thysanura and Myrio-l Proc. Bust. Soc. Nat. Hist., xvi, 1873, p. 3. RELATIONS OF INSECTS TO OTHER ARTHROPODA 19 poda, and shows the intimate relation of themyriopods and the hexapods, perhaps not suffi-ciently appreciated by many zoologists. In 1880 Ryder regarded it as the last survivalof the form from which insects may be supposed tohave descended, and referred it to the new ordi-nal group Symphyla, in reference to the singularcombination of rnyriopodous, insectean, and thy-sanurous characters which Wood-Mason considered itto be a myriopod, and the. FIG. 14.—Scolopendrella immaculata, from above, — after Lang; also from beneath, thegenital opening on the 4th trunk-segment: sac, eversihle or coxal sac: an, anus; c, eercopod ;r. vestigial leer. — After TTaase. from Peytoureau. ABC, head and hueeal appendages of Scolopen-drelJa immaculafa : A, head seen from above : c/. clypeus. B, head from beneath : ?, first pair ofIfsrs : my, 1st maxilla; , 2d maxilla: t. labial plates of Latzel, labium of Muhr. C, 1stmaxilla; f, laoinia: cj, galea; />, rudiment of the palpus. — After Latzel. D, end of the body: pn,eleventh,/>12. twelfth undeveloped pair of le<rs ; pn. modified, vestigial legs, hearing tactile organs(sol; g(j, eercopod. with duct of spinning gland, dg; cd, eversible or coxal gland ; hs, coxal spurof the llth p
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectinsects
