Medical Entomology and Zoology

Mode of transmission of various kinds of encephalitis (II)

M. Kitaoka

Article type: Article
1950 Volume 1 Issue 3 Pages 45-51
Published: October 20, 1950
Released on J-STAGE: August 07, 2016

DOIhttps://doi.org/10.7601/mez.1.45

JOURNAL OPEN ACCESS

Download PDF (634K)
On Anopheles lindesayi v. japonicus in Kanagawa Prefecture

I. Takata

Article type: Article
1950 Volume 1 Issue 3 Pages 51-54
Published: October 20, 1950
Released on J-STAGE: August 07, 2016

DOIhttps://doi.org/10.7601/mez.1.51

JOURNAL OPEN ACCESS

Show abstractHide abstract

In the previous paper (1949), I have reported that among Anopheles lindesayi var. japonicus collected at Kurihama, Kanagawa Prefecture, there were some specimens almost indistinguishable from the original type of this species (in adult stage), and suggested that it might be improper to devide the variey from the original type. During the period from May to September, 1949, larvae of A. lindesaxi were collected at 4 spots in Kanagawa Prefecture, viz, Kazamatsuri, Daiyusan, Hatano and the Lake Ashinoko. So it was conjectured that this species of Anopheles was not rare in this district. The breeding places of this species were the spring or small stream at the foot of the mountains and the water temperature was about 15℃ even in the midsummer. In 3 of the 4 breeding places no larva of other species was found. In the remaining one A. hyrcanus v. sinensis and A. koreicus were found, too. The larvae collected were bred in the laboratory to get adult mosuitoes. Though 250 were collected in total, most of them died before they emerge and only 25 adults were obtained. The laboratory breeding of the larvae of A. lindesayi was far more difficult than those of the other species. The successful breeding was achieved only in June when the atomospheric temperature was rather low, and by changing the water in the container of the larvae every morning and evening to keep cleanness. In contrary to the previous observations, the adult mosquitoes thus obtained all showed the characteristics of A. lindesayi var. japonicus and not a single specimen of the original type was seen.

View full abstract

Download PDF (390K)
On the third statistical observation of Dermatitis linealis

I. Soeda

Article type: Article
1950 Volume 1 Issue 3 Pages 55-60
Published: October 20, 1950
Released on J-STAGE: August 07, 2016

DOIhttps://doi.org/10.7601/mez.1.55

JOURNAL OPEN ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (556K)
Studies on anopheline mosquitoes in Tokyo : II. Some morphological observations

S. Ushiyama

Article type: Article
1950 Volume 1 Issue 3 Pages 60-63
Published: October 20, 1950
Released on J-STAGE: August 07, 2016

DOIhttps://doi.org/10.7601/mez.1.60

JOURNAL OPEN ACCESS

Show abstractHide abstract

Adult anopheline mosquitoes were collected in houses and stables in the vicinity of the Fujimi pond stated in the lst report. The collection of the mosquitoes was made from time to time during the period from July to September, 1948, and 35 females were obtained in total. Most of them were Anopheles hyrcanus v. sinensis, only one A. koreicus being found among them. These mosquitoes were kept alive, feeding blood meals and sugar solutions, until they oviposit. A batch of eggs laid contained from 60 to 280 (mean : 201) eggs and measurements of 200 eggs gave the dimension of 0.506-0.707mm (mean : 0.585mm) in length and 0.145-0.209mm (mean : 0.187mm) in breadth. These eggs were kept in the dish and the larvae, hatched from them, were bred until-they reached to the 4th stage larvae. The morphological characteristics of the larvae of each stage were examined in detail to find, if any, criterion to distinguish the stages of the larvae. Though hairs or groups of hairs on head, thorax and abdominal segments were examined, none of them was decisive of distingu shing the stages of the larvae except the side hair of the 3rd abdominal segment. The number of branches of this hair was quite characteristic of each stages of the larvae, never overlapping with each other, viz : The first stage : two hairs, single to 3 branches. The second stage : one hair, 4 to 8 branches. The third stage : one hair, 9 to 16 branches. The fourth stage : one hair, 17 to 29 branches. These findings are in accord with those reported by Shibata (1947) who collected larvae from ponds and suggested these characteristics statistically.

View full abstract

Download PDF (404K)
Culicoid flies from Kyushu, Japan : Ceratopogonidae, Diptera

MASAAKI TOKUNAGA

Article type: Article
1950 Volume 1 Issue 3 Pages 64-67
Published: October 20, 1950
Released on J-STAGE: August 07, 2016

DOIhttps://doi.org/10.7601/mez.1.64

JOURNAL OPEN ACCESS

Show abstractHide abstract

Mr. Hiroshi Matsuzawa has sent me many biting midges which were collected at various parts in Miyazaki Prefecture, Kyushu. I found following five culicoid species in his collection : Culicoides sigaensis Tokunaga, C. amamiensis Tokunaga, C. oxystoma Kieffer, C. arakawae Arakaw, C. matsuzawai n. sp. At present I intend to report a new species and two varieties of the above mentioned species.

View full abstract

Download PDF (317K)
On the incidence of Japanese B encephalitis and the mosquitoes collected by light trap at Okayama in 1950

S. Yamaguti, S. Inatomi

Article type: Article
1950 Volume 1 Issue 3 Pages 67-69
Published: October 20, 1950
Released on J-STAGE: August 07, 2016

DOIhttps://doi.org/10.7601/mez.1.67

JOURNAL OPEN ACCESS

Download PDF (253K)
Redescription of Aedes (Banksinella) imprimens (Walker) obtained from Japan : 1. Adults and pupae

Y. Waku

Article type: Article
1950 Volume 1 Issue 3 Pages 69-73
Published: October 20, 1950
Released on J-STAGE: August 07, 2016

DOIhttps://doi.org/10.7601/mez.1.69

JOURNAL OPEN ACCESS

Show abstractHide abstract

Aedes (Banksinella) imprimens (Walker) has been the species only incompletely described; so far, no figures have been given. The author recently identified a mosquito species collected near Sendai to be this species. A great many specimens have been collected since several years ago. The morphological description on adults and pupae of this species is given in this paper. Male and female heads differs in their scaling (fig.1). Male palpi long, uptured, hairly, and composed of a long basal segment, the second segment of moderate length, and a very small apical one (Fig.2). Scutum covered with narrow golden scales. Abdomen black, with white basal bands and lateral spots on each segment. Legs dark brown, with pale basal rings on each segment of tarsi and metatarsi. Male genitalia are very peculiar in its structure (Fig.3). Pupae resemble to those of Aedes esoensis and Ae. vexans, but A-hairs of eighth abdominal segment are 7-8 forked (Fig.4). Their habitat was in temporary ground-pools with decayed leaves.

View full abstract

Download PDF (490K)
Studies on a mosquito, Mansonia (Coquillettidia) ochracea (Theobald) : II Notes on the larval and pupal stages

R. Kano, S. Hayashi

Article type: Article
1950 Volume 1 Issue 3 Pages 73-75
Published: October 20, 1950
Released on J-STAGE: August 07, 2016

DOIhttps://doi.org/10.7601/mez.1.73

JOURNAL OPEN ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (297K)
[title in Japanese]

Article type: Appendix
1950 Volume 1 Issue 3 Pages 75-
Published: October 20, 1950
Released on J-STAGE: August 07, 2016

DOIhttps://doi.org/10.7601/mez.1.75

JOURNAL OPEN ACCESS

Download PDF (61K)
[title in Japanese]

Article type: Appendix
1950 Volume 1 Issue 3 Pages 76-
Published: October 20, 1950
Released on J-STAGE: August 07, 2016

DOIhttps://doi.org/10.7601/mez.1.76_1

JOURNAL OPEN ACCESS

Download PDF (70K)
[title in Japanese]

Article type: Appendix
1950 Volume 1 Issue 3 Pages 76-
Published: October 20, 1950
Released on J-STAGE: August 07, 2016

DOIhttps://doi.org/10.7601/mez.1.76_2

JOURNAL OPEN ACCESS

Download PDF (70K)

Register with J-STAGE for free!