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the Anophelines. The question of Anopheline infection by monkeys does not arise as there are no monkeys at large on the Island and no captive monkeys in this locality. This point has been raised by Dr. R. Green in the Transactions of the Royal Society of Hygiene and Tropical Medicine Vol. XXV, No. 6. The question also arises as to the mosquito infection being derived from birds (Mayne, Indian Journal Medical Research, 1928). None of the oocysts seen had the appearance described as the result of bird infection. The experiments of Russell in the Philippines do not lend support to this view as regards the local A. minimus (American Journal of Tropical Medicine, Vol. XI, No. 2, 1931).
The catching of such Anophelines as were obtained in this neighbourhood required a considerable expenditure of time and energy.
(2) Hong Kong Volunteer Defence Corps Camp.
Members of the staff who were under canvas during six week ends in November and December obtained 43 Anophelines from tents between dusk and 10 p.m., 28 were A. hyrcanus, 7 A. jeyporiensis, 6 A. minimus, 1 A. maculatus, 1 A. tesselatus. None of these were found infected on dissection.
There was swampy land adjacent likely to harbour A. hyrcanus.
(3) Woo Li Hop Village, and the adjacent matshed for road-making coolies.
The coolies were engaged in making a road to the Shing Mun Dam site, and were housed in a building composed of bamboo poles and palm leaf thatch known as a matshed. There has been a good deal of malaria amongst them and amongst the villagers. Searches were made at various times in the matshed, houses, cowhouses, and pigsties of the village, and the results are indicated in Table IX. The cowhouses are substantially built and dimly lighted, a torch light being required for the search. One investigator complained of having been bitten on three occasions in one morning. In some instances the cowhouses form part of the owners' dwelling, in others they are separate. The pigsties have walls reaching to the roof and are dark within. This has been the first opportunity of searching such buildings, and future results are likely to be interesting owing to the conditions of shelter different from the Wong Chuk Hang area. Infected mosquitoes were found in cowhouses but none so far in pigsties. The results of the dissections are found in Table XI.
(4) Kowloon Tong, Shaukiwan, Pokfulam, Ngau Tau Kok and Shek O.
During visits to above places a few Anophelines were obtained in brief searches, but none were found infected.