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to the breeding places receive most attention from this Anopheline. Table IX gives the results of morning catches. As in former years the majority of the A. jeyporiensis were obtained in the last quarter of the year.
60. Table X gives the results of dissections for malarial infections of mosquitoes caught in human habitations. For the first time, adults of A. tessellatus have figured in catches done in the Colony. A midgut infection was found in one of the two dissected in July. Three oocysts were seen in this specimen, measuring 41μ, 34μ, 29μ respectively. The pigment was light brown in colour, fine, arranged in lines and clumps. The only previous record of a malarial infection in this mosquito is from the Dutch East Indies, 1 in 1553 dissections.
61. In this locality A. minimus adults can be obtained throughout the year without difficulty but comparatively few A. maculatus and A. hyrcanus are ever got in day or night catches from human habitations in spite of the fact that their larvae can be collected in abundance in the neighbourhood.
62. Trials have been made by other methods. A portable hut was erected at the end of June, the catching coolie slept in it protected by a mosquito net. Mosquitoes could only enter the hut by narrow slots in the gauze of the mosquito-proof windows. Before daylight the exits from the slots were closed and a collection made. Few Anophelines were captured by this device although in a similar contrivance in use at Shanghai, catches of 300 A. hyrcanus could be got in one night. It is hoped to obtain better results in the coming year, by leaving the door open, or partly open during the night and closing it before dawn.
63. Owing to the good results obtained at the Dairy Farm Pokfulam by catching in the cattle byres from dusk onwards, similar methods were employed in two pigsties, one at the head of the main valley near the village of Little Hong Kong, the other at the head of the former Rice Ravine. The catchers remained in the pigsties for an hour and a half and by means of a torch light and catching apparatus, caught such mosquitoes as could be seen resting on the walls or roof. Catching was done every night except Saturdays, Sundays, and holidays from August onwards. Out of 524 Anophelines thus obtained, there were 202 A. maculatus, 243 A. hyrcanus, 35 A. minimus, 36 A. tessellatus, 8 A. jeyporiensis. No infections were found in 186 A. maculatus, 231 A. hyrcanus, 36 A. tessellatus, 32 A. minimus, 8 A. jeyporiensis dissected, although these were captured in a most malarious time of the year. Large numbers of Mansonia uniformis, Culex tritaeniorhynchus, Armigeres obturbans were caught.