日本産コメツキムシ科幼期の形態に関する研究 (VII)

概要

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The larvae are exclusively soil inhabitants, and infestations of this species seem to be severer in unirrigated fields than in irrigated tracts. Pupation normally occurs in late May and in early June ; under laboratory conditions, transformation occurs within about 13 days, but after a while all the newly emerged beetles leave their pupal cells. Length 18mm., greatest breadth 2.4mm. on third and fourth abdominal segments. A fully distended larva measured 20mm. Body elongate, subparallel-sided, becoming slightly narrower toward extremities ; dorsum slightly flattened ; abdominal mediotergites with conspicuous transverse rugae, and with impressions which are reaching or almost reaching to middorsal suture; each abdominal mediotergite with 7 or more prominent unpaired setae in posterior row ; dorsum of ninth abdominal segment with a pair of paramedian impressions and a narrow median dorsal groove ; with some small noticeable pits, and with 3 or 4 prominent "teeth" on each lateral margin ; nasale tridentate at tip, the lateral denticles projected antero-laterad. Dorsum yellowish brown or rather slightly dark brown ; head, and ninth abdominal segment usually pale reddish brown ; mandibles, talus, nasale, and prongs of urogomphi darkest ; venter pale yellow.
日本昆虫学会の論文
1958-12-10