M 135
(e) Mosquito Nuisance.
137. The usual plague of mosquitoes, due to C. fatigans occurred in the Mount Kellett area on the Peak, from the advent of the warm weather until the beginning of the rains. Breeding places were found on the Peak itself, but below Matilda Hospital, a hill stream was found by the Malariologist to be polluted by drainage from manure dumps; and from the contaminated pools, larvae of C. fatigans were collected in abundance, whilst above the pollution none were obtained. The rains set in shortly after the finding of these breeding places and although larvae of A. maculatus could be collected from them, no larvae of C. fatigans were obtained, the current being perhaps too strong or the pollution too weak. Later in the year larvae of both A. maculatus and of A. minimus were met with in the polluted water. Arrangements have been made for the oiling of the C. fatigans breeding places by Sanitary Department coolies.
138. At the Dairy Farm, Pokfulam, the septic tank has been mosquito proofed, the stream into which the effluent discharges and in whose pools larvae of C. fatigans were found in enormous numbers has been "rough" trained as far as Victoria Road, by the Assistant to Malariologist who is superintending the oiling of it, as well as the oiling of the stream below Matilda Hospital.
139. Larvae of C. fatigans have been found on occasions in the sumps receiving the drainage from the cow byres of the Dairy Farm.
140. C. fatigans mosquitoes were captured in large numbers at the Fanling Government Bungalow. Their larvae were found in the septic tank on the premises and also in a septic tank at the Fanling Golf Club. Recommendations were made for dealing with these places.
141. Visits were paid to the Jockey Club stables, Shek O, Coombe Road, Broadwood Road, Sassoon Road, and Repulse Bay, in connection with complaints made by householders. At the Jockey Club quarters the nuisance was caused by C. fatigans which bred in the effluent discharged from the stable drains, at Shek O it was caused by Aedes togoi which breeds in rock pools near the sea, at Coombe Road by Aedes albopictus whose larvae were found in great numbers in an ancient and miscellaneous collection of tins and crockery, amongst the undergrowth in the ravine at the junction of Coombe Road and New Aberdeen Road, at Broadwood Road the trouble was caused C. fatigans and Aedes albopictus which were breeding in discarded receptacles on the hill side above Blue Pool Road, at Sassoon Road by the same species whose larvae were found without difficulty in the village of Tai How Wan, and at Repulse Bay by Aedes albopictus whose larvae were found in concrete pits, and by Aedes togoi.