小笠原諸島の衛生害虫とくにカおよびゴキブリ類について

抄録

In this paper was reported the results of my survey on the medical insects, excluding flies, made chiefly in the Chichi-jima in the Ogasawara Islands (Bonin Islands) from August 1968 to October 1969. 1. Seven species of the mosquitoes were found to be distributed in Ogasawara Islands : Aedes savoryi, Aedes togoi, Aedes albopictus, Ades sp. I, Culex boninensis, Culex pipiens fatigans and Culex vorax. 2. Larvae and pupae of Aedes savoryi were collected from rock pool of sea coast at southern edge of Chichi-jima. Since the rearing of them in the laboratory were succeeded, the morphology of this species in immature stage and in male adult, which had been unknown, were observed. The blood sucking activity of females against men was also found to be very intensive outdoors in the day light. 3. Females of Aedes sp. I were caught by biting collections. But these in adult male or in immature stage were not found. 4. Among these seven species collected in this work three species of Aedes savoryi, Aedes sp. I and Culex boninensis which seemed to be peculiar to this Islands were quite unknown in epidemiologic significance. 5. In Chichi-jima Aedes albopictus were predominant in the thick forests and Culex pipiens fatigans in the proximity to human habitations. Both species, however, were not active in winter (January and February). 6. Aedes aegypti, known to have been distributed in large number in Ogasawara Islands, were not found at all during this work. 7. In Chichi-jima six species of the Cockroach were found. Blattella germanica, Blattella lituricollis, Onychostylus vilis, Periplaneta americana, Periplaneta australasiae and Supella supellectillium were collected in human houses, and two species of Blattella lituricollis and Pycnoscelus surinamensis in the field. In Iwo-jima Pycnoscelus surinamensis was collected in the field. 8. Blattella lituricollis were said to be found on the grass land around the human habitations. Only one specimens was collected coming to the light of a room at night. 9. Onychostylus vilis was the most abundant species as well as Periplaneta americana in the human houses of Chichi-jima. 10. Supella supellectillium was found first in our country. 11. In Chichi-jima Polyplax spinulosa was collected from Rattus rattus caught with alive-rattrap, and Ctenocephalides felis from dogs and cats. 12. Culicoides claggi Tokunaga, (1959) had already been recorded in the Island, but no specimen was found during the present work.