M 90
SPECIES INVESTIGATION.
ANOPHELINES.-Since August a record has been kept of the Anopheline larvae examined microscopically each month and of the imagines hatched out. As will be seen from attached figures, A. maculatus is most frequently met with, then A. minimus and next A. hyrcanus. Previous to September so very few larvae of A. minimus had been encountered that no adults had been hatched out, the only two specimens obtained had been captured in Capt. Moir's House, Castle Peak Road on 4. 6. 30. Larvae of A. aitkeni were found in April and at various times since from the same pool. This species so far as I am aware has not yet been included in the list of Hong Kong Anophelines. Larvae of A. jeyporiensis have been met with both in the Island and in the New Territory. One specimen of A. vagus larva has been found. From Cheung Chau Island, a larva with clypeal hairs resembling A. umbrosus but which had palmate tufts, was obtained, also two larvae which resembled A. punctulata. Unfortunately these specimens were damaged after being mounted and before they could be examined at leisure. Several larvae have been found which closely resemble but which have not got the well developed dorsal plates of A. minimus. No adults have yet been obtained from these.
Larvae of A. maculatus have been found in concrete tanks near Tung Wah Eastern Hospital in the Botanical and Forest Department Gardens, in a wooden tub, in earthen jars, and on several occasions in masonry drains where accumulation of water had collected owing to the drain being obstructed by debris, in some cases the water came from seepages, in one instance it came from a house drain but had filtered through some earth and sand which had been washed into the drain. Close to the Peak Garage, these larvae were found in holes which have been left in the concrete facing of the embankment for the purpose of planting trees. Culicine larvae were found in the same holes, decaying vegetable matter was present in the water. The adults hatched out from these larvae were C. fatigans and C. virgatipes. Larvae of A. maculatus have also been found along with larvae of A. aitkeni.
Larvae of A. minimus were found in association with A. maculatus in a small concrete tank behind an unoccupied house at Taipo.
CULICINES.-Larvae of the following Culicines were collected:
Aedes albopictus, A. togoi, A. japonicus, A. macfarlanei, A. argenteus, Culex fatigans, C. vishnui, C. bitaeniorhynchus, C. sitiens and C. mimeticus; Armigeres obturbans; Megarhinus splendens; and two species of Lutzia. Very few adult specimens of Aedes aegypti (Stegomyia fasciata) were obtained
M 90
SPECIES INVESTIGATOIN.
ANOPHELINES.-Since August a record has been kept of the Anopheline larvae examined microscopically each month and of the imagines hatched out. As will be seen from attached figures, A. maculatus is most frequently met with, then A. minimus and next A. hyrcanus. Previous to September so very few larvae of A minimus had been encountered that no adults had been hatched out, the only two specimens obtained had been captured in Capt. Moir's House, Castle Peak Road on 4. 6. 30. Larvae of A. aitkeni were found in April and at various times since from the same pool. This species so far as I am aware has not yet been included in the list of Hong Kong Anophelines. Larvae of A. jeyporiensis have been met with both in the Island and in the New Territory. One specimen of A. vagus larva has been found. From Cheung Chau Island, a larva with clypeal hairs resembling A. umbrosus but which had palmate tufts, was obtained, also two larvae which resembled A. punctulata. Unfortunately these specimens were damaged after being mounted and before they could be examined at leisure. Several larvae have been found which closely resemble but which have not got the well developed dorsal plates of A. minimus. No adults have yet been obtained from these.
Larvae of A. maculatus have been found in concrete tanks near Tung Wah Eastern Hospital in the Botanical and Forest Department Gardens, in a wooden tub, in earthern jars, and on several occasions in masonry drains where accumulation of water had collected owing to the drain being obstructed by debris, in some cases the water came from seepages, in one instance it came from a house drain but had filtered through some earth and sand which had been washed into the drain. Close to the Peak Garage, these larvae were found in holes which have been left in the concrete facing of the embankment for the purpose of planting trees. Culicine larvae were found in the same holes, decaying vegetable matter was present in the water. The adults hatched out from these larvae were C. fatigans and C. virgatipes. Larvae of A. maculatus have also been found along with larvae of A. aitkeni.
Larvae of A. minimus were found in association with A. maculatus in a small concrete tank behind an unoccupied house at Taipo.
CULICINES.-Larvae of the following Culicines were
collected:-
Aedes albopictus, A. togoi, A. japonicus, A. macfarlanei, A. argenteus, Culex fatigans, C. vishnui, C. bitaeniorhynchus, C. sitiens and C. mimeticus; Armigeres obturbans; Megarhinus splendens; and two species of Lutzia. Very few adult speci- mens of Aedes aegypti (Stegomyia fasciata) were
fasciata) were obtained
No comments yet.
Private notes are available after approval.