畑や水田付近に見られるゴミムシ類(オサムシ科)の幼虫の記載 (I)

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The authors described larval characteristics of the six species of the Harpalini. They are : -Anisodactylus (Anisodactylus) sadoensis Schauberger (1st, 2nd and 3rd instars), Harpalus (Cephalomorphus) capito Morawitz (1st instar), H. (Pseudoophonus) eous Tschitsch6rine (1st instar), H. (P.) niigatanus Schauberger (1st, 2nd and 3rd instars), H. (P.) simplicidens Schauberger (1st and 2nd instars) and H. (Loboharpalus) platynotus Bates (1st and 2nd[or 2nd and 3rd]instars). Nine of the ten specimens of the second instar (or second and third instar) larvae of H. platynotus were collected in fields, but other specimens were obtained by laboratory breeding (viz. ex oviposition). Among the above species, only Anisodactylus sadoensis is of the aestival type, and the other five Harpalus species pass the winter in the larval stage, that is the hibernal type. The authors bred some second instar larvae of H. platynotus, but could not observe the ecdysis, and therefore there is some possibility that either some of the specimens regarded as the second instar are in the third instar, or the second instar larvae directly pupate instead of changing into the third instar. The head width was not at all useful in determination of the instar in this species inasmuch as the authors could not find any distinct interval of the width between the first and second instars, and the second and third instars if the larvae passed three instars as usual (cf. Fig. 20). The length of the cerci and number of their long setae were also of no avail in determining the instar. The length is from 0.7 to 0.9 mm (mean value is 0.8 mm in the six specimens examined) in the first instar, while it ranges from 0.6 to 0.9 mm (mean value is 0.7 mm in the ten specimens examined) in the second (or second and third) instar(s). Each cercus has six long setae and one rather long apical seta in the first instar larvae, whereas it has five or six, rarely seven to eight, long setae and one rather long apical seta in the second (or second and third) instar(s).
日本昆虫学会の論文
1970-04-30

畑や水田付近に見られるゴミムシ類(オサムシ科)の幼虫の記載 (I)

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