Entomology : with special reference to its biological and economic aspects . The snow flea, Actio-nites nivicola. Length,2 mm. Fig. Smintliurus liortciisis. Length, mm. lO ENTOMOLOGY 2. Collembola.—No metamorphosis. jNIouth parts entog-iiathoiis and typically mandibulate, with occasional secondarysuctorial modifications, ^^^ings invariably absent. Thoracicsegments simple and similar or prothorax reduced. Bodycylindrical or globular; abdomen with six segments. Ventraltube and furcula usually present, rarely rudimentary. Eyesocelliform or absent. Antennae of four segments in mostgenera;
Entomology : with special reference to its biological and economic aspects . The snow flea, Actio-nites nivicola. Length,2 mm. Fig. Smintliurus liortciisis. Length, mm. lO ENTOMOLOGY 2. Collembola.—No metamorphosis. jNIouth parts entog-iiathoiis and typically mandibulate, with occasional secondarysuctorial modifications, ^^^ings invariably absent. Thoracicsegments simple and similar or prothorax reduced. Bodycylindrical or globular; abdomen with six segments. Ventraltube and furcula usually present, rarely rudimentary. Eyesocelliform or absent. Antennae of four segments in mostgenera; five or six in a few genera. Integument , Achoriitcs (Fig. ii), Sminthnnis (Fig. 12).About seven hundred species have been described. Fig. 13. Fig. 14.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectentomology, bookyear1
