日本産コメツキムシ科幼期の形態に関する研究 (IX)

概要

論文の詳細を見る
The larvae are exclusively soil inhabitants, and have been found in both the Kanto and Chubu districts of Honshu, at altitudes up to 1500-2000 meters. Pupation occurs normaly in late July. The pupal period lasts about 13 days. The specimens used in the present study were collected from meadow soil. Length 18 mm, greatest breadth 2.5 mm on third and fourth abdominal segments. Dorsum yellow or orange-yellow in color, with head, prothorax, and ninth abdominal segment darker ; venter pale yellow. Frontoclypeal region truncate posteriorly ; each paranasal lobe with a cluster of 20 or more "sensory" pores. Nasale well-developed ; tridentate at tip, median denticle the largest. Mesothorax and metathorax with impressions which are especially distinct on mediotergites. Abdominal mediotergites with transverse branches of impressions which are extending about four-fifths of distance from longitudinal branches to middorsal suture, with small punctures, and with 3 pairs of setae in a posterior transverse row. Urogomphi bifid ; outer prongs slightly shorter than inner prongs in length, cordiform, projecting dorso-caudad ; inner prongs directed inwardly, stout, with hard, dark antero-median margins. Dorsal plate of ninth abdominal segment with 2 or more small unpaired setae ; with narrow paramedian impressions, and well-rounded tubercles on lateral margins. Caudal notch small, shield-shaped, slightly wider than long.
日本昆虫学会の論文
1959-06-30