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106
IV. ENTOMOLOGICAL RESEARCH.
No. 66.
FOREIGN OFFICE to COLONIAL OFFICE.
(Received 27th January, 1916.)
THE Under-Secretary of State for Foreign Affairs presents his compliments to the Under-Secretary of State for the Colonies, and, by direction of the Secretary of State, transmits herewith copy of a despatch from His Majesty's Ambassador at Tokyo relating to the distribution of mosquitoes in the Far East.
Reference to previous correspondence: letter from Foreign Office, 3rd July,
1915.*
Foreign Office,
26th January, 1916.
(No. 414.) SIR,
Enclosure in No. 66.
British Embassy, Tokyo, 23rd December, 1915. WITH reference to my despatch No. 129, of 25th May last, respecting the distribution of mosquitoes in the Far East, I have the honour to transmit, herewith, translation of a report on the subject which I have received from the Japanese Ministry for Foreign Affairs.
The author begs me to state, when forwarding the report, that it is incomplete, and that the numbers of the species of mosquitoes tabulated do not agree with those of the specimens which have been sent to the Natural History Museum direct. A complete report is, he adds, in course of preparation.
The Right Honourable
Sir Edward Grey, Bart., K. G., M.P.,
etc., etc., etc.
I have, &c.,
CONYNGHAM GREENE.
I-Investigation of the species of the Mosquito family.
The work of investigating the mosquito family may be divided into the follow- ing four sections :-
1. Investigation of the species of the mosquito family, their mode of life,
and their distribution.
2. Investigation of the form and mode of life of the larva of each species
of the mosquito family.
3. The relations between the mosquito family and human life.
4. The conduct of suppression of the mosquito family.
The investigation of the species of the mosquito family is, above all, the first question in the work of investigating the mosquito family, and must be the princi- pal fundamental matter. Up to the present, however, information concerning the study of the breeding of mosquitoes in this country is very fragmentary, and does not go beyond what is come across in a number of kinds of foreign treatises and two or three reports in Japanese. Consequently, considering that it was an urgent duty of those engaged in the investigation of the mosquito family to supplement and collect this information, as a beginning, the collection of the mosquito family inside the city of Tokyo was principally worked at, and the following seventeen specimens of seven kinds were secured:
1. Myzorhynchus Sinensis, Wiedemann (1828).
2. Stegomyia scutellaris, Walker (1859),
3. Stegomyia sp.
4 Desvoidya obturbans, Walker (1880).
5. Culex japonicus, Theobald (1901).
* 90621.
107
6. Culex pallens, Coguillett (1899).
7. Culex biroi, Theobald (1905).
8. Culex tigripes, Grandpré et Charmoy (1900).
9. Culex tripunctatns, Mochizuki (1913).
10. Culex sp. 1.
11. Culex sp. 2.
12
Culex sp. 3.
13. Culex sp. 4.
14. Culex sp. 5.
15. Leucomyia plegepennis, Theobald (1907). (Kobe).
16. Ædeomyia sp.
17. Hemagogus sp.
Of the above, nine species were previously known to the scientific world. The remaining eight species were found in Japan for the first time by this collection. As to whether these eight species were all hitherto unknown to scientific circles, it is difficult to give a decision, as our collection of treatises is still incomplete, but there is no doubt that not less than four of them at least are new species. We are still conducting researches with regard to them, and when a decision is later on arrived at we desire to introduce them to scientific circles.
As the British Government asked for specimens of the above families of the mosquito, on the 17th of November thirteen species of them were sent as dried specimens (294 mosquitoes) and as specimens steeped in alcohol (202 mosquitoes) by British parcel post (via Canada) to "The Director of the Imperial Bureau of Entomology at the British Museum (Natural History), London, S.W.” II-The Investigation of the Distribution of each species of the Mosquito family. With regard to the distribution of each species of the mosquito family, although sufficient materials have not yet been secured, the following results have been obtained from persons who were despatched some time ago to Kanagawa, Hyogo, and Isbikawa prefectures, and made observations and collections there from materials collected by Mr. Torao Watanabe, a clerk in this Department, at our request, from Chemulpo, Kurume, and Udo (Kumamoto prefecture), and also from specimens presented by two or three friends :-
1.-Myzorhynchus sinensis. Distribution: Fukuoka, Kobe, Kyoto, Nagoya, Kanazawa, Yokohama, Tokyo, Niigata.
2. Stegomyia scutellaris. Distribution: Fukuoka, Kobe, Kyoto, Nagoya, Kanazawa, Yokchama, Tokyo, Marakal-Pelew Island in the south seas.
3.-Stegomyia sp. Distribution: Kyoto, Tokyo.
4. Desvoidya obturbans. Distribution: Udo, Kurume, Kobe, Kyoto, Nagoya, Yokohama, Tokyo, Kanazawa, Niigata.
5. Culex japonicus. Distribution: Kyoto, Nagoya, Yokohama, Tokyo, Kanazawa, Niigata.
6.-Culex pallens. Distribution: Chemulpo, Kurume, Udo, Kobe, Kyoto, Nagoya, Yokohama, Tokyo, Kanazawa, Niigata.
7.-Culex biroi. Distribution: Kobe, Kyoto, Nagoya, Yokohama, Kanazawa, Tokyo.
8.-Culex tigripes. Distribution: Kobe, Kyoto, Nagoya, Yokohama, Kana- zawa, Tokyo.
9.-Culex tripunctatns. Distribution: Kobe, Kyoto, Nagoya, Yokohama, Tokyo,
10-Culex sp. 1.. Distribution: Kobe, Kyoto, Nagoya, Yokohama, Kanazawa, 11.-Culex sp. 2. Distribution: Tokyo.
Tokyo.
12. Culex sp. 3.
13. Culex sp. 4.
Distribution: Kobe, Kyoto, Tokyo.
Distribution: Kobe, Yokohama, Tokyo. 14.-Culex sp. 5. Distribution Tokyo.
15.-Leucomyia plegepennis. Distribution: Kobe. 16. Edeomyia sp. Distribution : Tokyo.
17.-Hæmagogus sp. Distribution: Kyoto, Tokyo.
III.-Investigation of the Larva of each species of the Mosquito family.
As regards thirteen specimens found on this occasion, out of the seventeen enumerated above, the places in which they live are as follows:-