23. Few A. minimus larvae were collected from those portions of streams in which the grade was steep.
24. In morning catches adults were captured without difficulty in certain types of human habitation, especially buildings made of thatch and bamboo. As in former years these Anophelines were found to be important carriers of malaria and to harbour larval filariae.
25. This species was also experimentally infected with subtertian malaria, and micro-filariae (W. bancrofti).
26. A. hyrcanus var. sinensis. The larvae were met with in stagnant water with vegetation, e.g. wet cultivation, especially rice at certain times of the year, in pools amongst rice stubble, abandoned rice fields, sluggish streams and ditches. On a few occasions they were collected from small muddy pools without vegetation.
27. Like A. maculatus the imagines did not figure to any extent in morning collections from human habitations except in the case of the screened lines at Shing Mun. Considerable numbers were obtained from cowsheds at Shek O in morning catches prior to drainage measures being undertaken there, and from suitable village cowbyres and pigsties. A fair number were obtained from pigsties at Little Hong Kong in catches done at night.
28. Attempts to infect this species with subtertian parasites were not successful, but it was infected with microfilariae (W. bancrofti).
29. A. jeyporiensis var. candidiensis. Larvae were collected from abandoned rice fields throughout the year. In the last quarter they were found in rice cultivation and in pools amongst rice stubble. Those found in the rice stubble were probably there before the rice was cut, as few were found in surveys done some weeks afterwards.
30. Like A. minimus the imagines were obtained without difficulty in morning catches done in thatched huts or matsheds within flying distance of the breeding places. They were found to be important carriers of malaria and to harbour larval filariae as in former years. They were experimentally infected with subtertian malaria.
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(c) Those in which A. minimus larvae are absent during the May to September period, but in collections made at the beginning and end of the year were almost as numerous as those of A. maculatus. A few specimens identified as A. fluviatilis have been obtained from larvae and pupae collected from this type of stream.
23. Few A. minimus larvae were collected from those portions of streams in which the grade was steep.
24. In morning catches adults were captured without diffi- culty in certain types of human habitation, especially buildings made of thatch and bamboo. As in former years these Anophelines were found to be important carriers of malaria and to harbour larval filariae.
25. This species was also experimentally infected with subtertian malaria, and micro-filariae (W. bancrofti).
26. A. hyrcanus var. sinensis. The larvae were met with in stagnant water with vegetation, e.g. wet cultivation, especially rice at certain times of the year, in pools amongst rice stubble, abandoned rice fields, sluggish streams and ditches. On a few occasions they were collected from small muddy pools without vegetation.
27. Like A. maculatus the imagines did not figure to any extent in morning collections from human habitations except in the case of the screened lines at Shing Mun. Considerable numbers were obtained from cowsheds at Shek O in morning catches prior to drainage measures being undertaken there, and from suitable village cowbyres and pigsties. A fair number were obtained from pigsties at Little Hong Kong in catches done at night.
28. Attempts to infect this species with
with subtertian parasites were not successful, but it was infected with microfilariae (W. bancrofti),
/
29. A. jeyporiensis var. candidiensis. Larvae were collected from abandoned rice fields throughout the year. In the last quarter they were found in rice cultivation and in pools amongst rice stubble. Those found in the rice stubble were probably there before the rice was cut, as few were found in surveys done some weeks afterwards.
30. Like A. minimus the imagines were obtained without difficulty in morning catches done in thatched huts or matsheds within flying distance of the breeding places. They were found to be important carriers of malaria and to harbour larval filariae as in former years. They were experimentally infected with subtertian malaria.
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