ヒメトゲトビムシの産卵習性と卵の形態

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This paper deals with the breeding habits, especially the transformation of the chorion of eggs of Tomocerus minutus and some other species of Tomocerus. Materials used for observation were all collected in and round Hirosaki and raised in the laboratory. The eggs of T. minutus when freshly laid are white in colour, with pearl-like shimmer. They are spherical in form, and each measures on an average about 0.20mm. in diameter. They seem to be deposited by the female in little groups in the field, though they were often laid separately in the laboratory. After 24 to 28 hours of laying every egg becomes opaque white and begins the transformation of chorion. The chorion extends itself from a median line towards the sides over the surface of egg until it forms a pair of lateral chamber, each of which is soonly provided with two curved spines. In the laboratory, spawning of T. minutus was observed twice a year, the middle to later parts of May and September. About nineteen days after egg-laying, young insects emerge from the ventral potion of the eggs between two lateral chambers.
社団法人日本動物学会の論文
1956-12-15