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91. Towards the end of October 1983, larval surveys were done in two sets of terraced rice fields before the cutting of the second crop and whilst the water was being drained off. From one set 102 larvae were collected, 76 of which were A. hyrcanus, 26 A. jeyporiensis. From the other set 763 larvae were obtained, 70% of which were A. hyrcanus, 18% A. minimus, 12% A. jeyporiensis.
92. In 1934 further investigations were made from the middle of September to 8th November in various rice cultivations. The areas searched were the fields north of the Access Road, between stream A. and the head of B, those in the valley through which stream A4 flows and which has at its head the village of Sheung Kwai Chung, and rice fields along the banks of A1, A2, A3 and their branches. One survey was done in September and larvae of A. hyrcanus were found, but in small numbers. In October and November the results varied.
93. In one place only larvae of A. hyrcanus were found, in other places the percentage of A. jeyporiensis varied from 2% of the collection to 40%. In some of the collections the percentage of A. minimus was low, in others it formed 10% and in one it was 30%. The area A2e was surveyed on the 2nd November, A. jeyporiensis formed 2% of a collection of 200 larvae. A2f a short distance from A2e was searched on the 6th November yet A. jeyporiensis formed 40% of a collection of 519. The larvae of A. jeyporiensis were obtained in small numbers from the rice cultivation as compared with the numbers which could have been got in the same time from the fallow fields in A1a, A2f being an exception. The rice fields investigated were mostly irrigated by ditches from hill streams, such could soon be dried after the cutting of the second crop, and so did not furnish breeding pools in the rice stubble.
94. The Malariologist paid 36 visits during the year, the Assistant to Malariologist 75. Five Inspectors made 71, 55, 32, 27, 12 visits respectively. In addition a laboratory coolie helped in the larval collections as well as the two Vaccinators.
95. The visits were made for the purposes of larval surveying, searching for fresh breeding places, checking of oiling measures, inspecting fallow rice fields which had been drained and the upkeep of this drainage, checking local catches, inspecting areas dealt with by engineering work.
96. The Anti-malarial and Hospital staff were housed in mosquito proofed quarters, none of them contracted malaria.
97. Twenty-four Europeans resided in mosquito proof quarters, two suffered from malaria, one of whom had had an attack in the previous year.
M 128
91. Towards the end of October 1983, larval surveys were done in two sets of terraced rice fields before the cutting of the second crop and whilst the water was being drained off. From one set 102 larvae were collected, 76 of which were A. hyrcanus, 26 A. jeyporiensis. From the other set 763 larvae were obtained, 70% of which were A. hyrcanus, 18% A. minimus, 12% A. jey- poriensis.
92. In 1934 further investigations were made from the middle of September to 8th November in various rice cultivations. The areas searched were the fields north of the Access Road, between stream A. and the head of B, those in the valley through which stream A4 flows and which has at its head the village of Sheung Kwai Chung, and rice fields along the banks of A1, A2, A3 and their branches. One survey was done in September and larvae of A. hyrcanus were found, but in small numbers. In October and November the results varied.
93. In one place only larvae of A. hyrcanus were found, in other places the percentage of A. jeyporiensis varied from 2% of the collection to 40%. In some of the collections the percentage of A. minimus was low, in others it formed 10% and in one it was 30%. The area A2e was surveyed on the 2nd November, A. jeyporiensis formed 2% of a collection of 200 larvae. A2f a short distance from A2e was searched on the 6th November yet A. jeyporiensis formed 40% of a collection of 519. The larvae of A. jeyporiensis were obtained in small numbers from the rice cultivation as compared with the numbers which could have been got in the same time from the fallow fields in Ala, A2f being an exception. The rice fields investigated were mostly irrigated by ditches from hill streams, such could soon be dried after the cutting of the second crop, and so did not furnish breeding pools in the rice stubble.
94. The Malariologist paid 36 visits during the year, the Assistant to Malariologist 75. Five Inspectors made 71, 55, 32, 27, 12 visits respectively. In addition a laboratory coolie helped in the larval collections as well as the two Vaccinators.
95. The visits were made for the purposes of larval surveying, searching for fresh breeding places, checking of oiling measures, inspecting fallow rice fields which had been drained and the upkeep of this drainage, checking local catches, inspecting areas dealt with by engineering work.
96. The Anti-malarial and Hospital staff were housed in mosquito proofed quarters, none of them contracted malaria.
97. Twenty-four Europeans resided in mosquito proof quar- ters, two suffered from malaria, one of whom had had an attack in the previous year.
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