Medical Entomology and Zoology
Online ISSN : 2185-5609
Print ISSN : 0424-7086
ISSN-L : 0424-7086
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Volume 32, Issue 2
Displaying 1-10 of 10 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    1981 Volume 32 Issue 2 Pages Cover6-
    Published: June 15, 1981
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.32.Cover6
    JOURNAL FREE ACCESS
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  • Gynandromorphs of Aedes togoi
    Takeo TADANO
    Article type: Article
    1981 Volume 32 Issue 2 Pages 91-94
    Published: June 15, 1981
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.32.91
    JOURNAL FREE ACCESS
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    Twenty-nine gynandromorphs were isolated from various strains of Aedes (Finlaya) togoi during genetic research on this species performed for 4 years. All these mosquitoes preserved in an alcohol solution were examined only externally. A high correlation existed between sex characters of copulatory organs and of abdomen, but no other regularity was observed among 5 kinds of organs examined (copulatory organ, abdomen, wing, antenna and palp). Of 29 gynandromorphs, only 5 were of the antero-posterior type and 4 were of the lateral type.
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  • Ecological studies on overwintering populations of Culex pipiens pallens : 1. Wing-length distribution and R-ratio of the overwintering females from various latitudes of Japan
    Kiyoshi MAKIYA
    Article type: Article
    1981 Volume 32 Issue 2 Pages 95-104
    Published: June 15, 1981
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.32.95
    JOURNAL FREE ACCESS
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    Wing-length frequency of overwintering Culex pipiens pallens from six localities of Japan was not distributed normally because of minority of shorter-winged mosquitoes. From the results of wing-length distribution analysis, the overwintering Cx. p. pallens populations in Japan were considered to be composed of two or three wing-length groups. R-ratio of the wing vein was smaller in the shorter-winged group and larger in the longer-winged group. R-ratio of the population, however, showed normal distribution and the mean R-ratios were within the range of Cx. p. pallens. Parous rate was higher in the shorter-winged mosquitoes. It was concluded from these results that the shorter-winged mosquitoes emerged earlier than the longer-winged group and joined to the majority of the overwintering group. Regressions were observed between each of wing length, R-ratio and body colour and the latitudes where the mosquito populations were sampled. Between wing length and R-ratio, linear regression was significant in each of the populations and also among the six populations; the regression coefficient was much larger among the populations than within the population.
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  • Description of Atylotus suzukii n. sp. from Kyushu, Shikoku and Tsushima Islands, Japan (Diptera, Tabanidae)
    Hirofumi HAYAKAWA
    Article type: Article
    1981 Volume 32 Issue 2 Pages 105-110
    Published: June 15, 1981
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.32.105
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    Atylotus suzukii, a new species, was described based on the materials collected as larvae from Kyushu, Shikoku and Tsushima Islands. This species is closely allied to A. angusticornis (Loew) and A. sawadai Watanabe et Takahasi in its morphological features, but can be distinguished from them by the more distinctive abdominal markings with golden hairs and by genitalia. Key to angusticornis group was proposed.
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  • Observations on the life history of the Japanese cockroach, Periplaneta japonica (Karny) under outdoor conditions
    Motoko KOMIYAMA, Kazuki OGATA
    Article type: Article
    1981 Volume 32 Issue 2 Pages 111-115
    Published: June 15, 1981
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.32.111
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    In order to clarify the life cycle of the Japanese cockroach, Periplaneta japonica (Karny), a rearing experiment was carried out under outdoor conditions in Kawasaki, Kanagawa Prefecture from April 1979 to September 1980. The results were as follows : The majority of the adults emerged bimodally from the end of April (1979) or early May (1980) to early July. The number of adults was most abundant in mid June and then decreased gradually toward the end of September. Two adults emerged in late summer barely survived until mid winter. Nineteen hundred and nineteen of oothecae were deposited from mid May to early October and the peak was observed in June. Hatching was observed from the end of June to mid September, but no hatching occurred in over-wintered oothecae. The incubation period of eggs ranged from 24.2 to 34.0 days in average, and it gradually shortened into the end of summer. The percentage of hatched oothecae was 52.5% in average and nymphs hatched per oothecae numbered 11.5 in average. All nymphs hatched in 1979 over-wintered at the 3rd to 9th instar nymphs. More than 50% of them emerged as adults during the following year. The nymphs, which had hatched in 1978 and did not emerge in 1979,over-wintered again at the nymphal stage. Of these, 80.5% emerged in 1980,and the remainder died before emerging as adults.
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  • The effect of temperature on development and predation of marsh fly, Sepedon aenescens Wiedemann (Diptera : Sciomyzidae)
    Yutaka YONEDA
    Article type: Article
    1981 Volume 32 Issue 2 Pages 117-123
    Published: June 15, 1981
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.32.117
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    It was ascertained from laboratory study that the prey snails for larvae of Sepedon aenescens were 7 species out of 9 species examined, they were all non-operculate species; Austropeplea ollula, Radix auricularia japonica, Physa acuta, Hippeutis (Segnitilia) cantori, Gyraulus chinensis, Biomphalaria sp. and Bulinus sp. Oncomelania nosophora and Parafossarulus manchouricus were not attacked by larvae, because of their rigid opercula. Predation behavior of larvae was also observed in detail. There was no significant difference between velocities of development of larvae fed on Physa acuta and that of larvae fed on Hippeutis (Segnitilia) cantori. The calculated thresholds of temperatures for development were 13.5℃ in egg, 8.0℃ in larva, 11.1℃ in pupa and 10.3℃ for completing the whole immature period. The thermal constants in each developmental stage were about 36,160,78 and 268 day-degrees, respectively. Amounts of snails fed by larvae at low temperature (15℃) and high temperature (30℃) were larger than those other temperatures (19,22 and 25℃) examined, and amount of snails fed per day was maximum at 30℃. At same temperature, Hippeutis (Segnitilia) cantori seemed to be easily attacked by larvae much more than Physa acuta. Pupal weights of larvae reared at 15 and 30℃ were more lighter than others, however body length and body width of pupae did not show a special tendency. Longevities of immature stages were more lower at 15 and 30℃, and length of fore-wing (only) of adult was minimum at 30℃.
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  • New locality records of five mosquito species in Japan
    Motoyoshi MOGI, Ichiro MIYAGI, Hiroshi SUZUKI
    Article type: Article
    1981 Volume 32 Issue 2 Pages 124-126
    Published: June 15, 1981
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.32.124
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • Plants as oviposition sites of Tabanus chrysurus Loew, 1858 and its egg-batches (Diptera, Tabanidae)
    Hirofumi HAYAKAWA, Yohtaro YONEYAMA
    Article type: Article
    1981 Volume 32 Issue 2 Pages 127-129
    Published: June 15, 1981
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.32.127
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    Egg-batches of Tabanus chrysurus Loew, 1858 were collected in and around the forest at Urakawa-cho, Hokkaido and at Shizukuishi-cho, Iwate-ken in August, 1977-1978. The eggs were laid on leaves, twigs and stems of 14 plants at the height of about 67.7cm above the ground. Total number of the egg-batches on the twigs and stems surpassed that on the leaves. These plants were grown at shady and wet places. The egg-batch was glossy blackish brown to black in color and roughly pyramidal in shape with 3 to 6 layers of eggs. Average number of eggs per batch was 729.
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  • A case of ophthalmomyiasis externa
    Yutaka YONEDA, Hiroko IWAMI
    Article type: Article
    1981 Volume 32 Issue 2 Pages 130-132
    Published: June 15, 1981
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.32.130
    JOURNAL FREE ACCESS
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    In June 17,1980,50 flesh fly larvae were detected at the right eye of a female neonate who was born at a hospital in Kurume City in the day before. The patient was suffering from an acute conjunctivitis due to the infection of the larvae. After the larvae were removed from the eye, the symptom disappeared rapidly. The larvae were about 1.6mm long, milky white. The specimens were identified as first instar larvae of Parasarcophaga similis (Meade, 1876) judging from its morphological characters.
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  • [title in Japanese]
    Article type: Cover
    1981 Volume 32 Issue 2 Pages Cover8-
    Published: June 15, 1981
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.32.Cover8
    JOURNAL FREE ACCESS
    Download PDF (46K)
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