Description of the Two New Species of the
Genus Cnetha from Japan (Diptera, Simuliidae)
その他（別言語等）
のタイトル
Cnetha属のブユ2新種の記載
著者（英） Ono Hiroshi
journal or
publication title
Research bulletin of Obihiro Zootechnical University. Series I
volume 10
number 4
page range 893‑909
year 1978‑06‑25
URL http://id.nii.ac.jp/1588/00002283/
R四 .s"u. Obihiro Univ.. 10 (1978) : 893‑909.
D e s c r i p t i o n o f t h e Two New S p e c i e s o f t h e G e n u s
Cnethaf r o m ] a p a n ( D i p t e r a
，S i m u l i i d a e ) l )
Hiroshi ONO特
(The Nukabira Biological Institute
，
Obihiro Unive悶ity，
Kamishihoro，
Hokkaido，
Japan) Received November 3D，
1977Cnetha
属のプユ
2新 種 の 記 載
野 決
Introduction
893
During the period from February to May 1975‑1977， a large number of larvae and pupae of the two species of simuliids were collected in slowly running stream flowing under the Yoda Terrace situated i
n O
bihiro. 1n the specimens of reared adults， associated pupal skins and larvae， the one is allied to Cnetha subcoslalum (TA日 HASI)(=
Eusimulium subcostatum T A臥 HASI)and the other to C. uchidai (TAKAHASI) (=E. uchid，
田 TAKAHASI).However， these tWQ species can be distinguished from any other species
i n
several charac‑恒r5
，i .
e.，
each genitalis of both sexes，
pupal respiratory organ，
variable pigmentation of larval head capsule and cocoon. C. uchidai and C. subcostatum are widly distributed in Japan and Korea. In Hokkaido both species are commonly fnund on small streams from mountainous regions to plain regions， and the adults are collected from May to November，but the present two new species are found on the special habitat of small and spring.fed streams which flow into the swamp under the terrace， and the adults app田 ronly in April to June. In this paper， full description of the two new species are given together with some biological notes.
Description
1 .
CnethαboldstemtαONO， n. sp. Figs. 1‑27.( J
apanese name: Obihiro.tsunomayu.buyuJFernale. Length: body， 3. 4‑3. 8 m m ; wing， 3. 2‑3. 4 mm. General body colour greyish b1ack; 1egs grey
Head black， as wide as thorax， posterior and undersurface densely covered with short greyish white hairs; a row of long， erect greyish white hairs present along posterior and
1) Contribution No
・
84from the Laboratory of Entomology，
Obihiro University. 勢帯広畜産大学糠平生物研究所1日9
