﻿136 舉雜誌 第 参 卷第參 • 四 欲 



7. Melanostoma teizonis Mats. (n. sp.) 



:5nining black, with an aeneous tinge. Face grayish pruinous, 

 with whitish, front with brownish hairs. Anetnnae yellow, the 3rd 

 joint on its back infuscated, arista yellowish. Thorax and scutellum 

 pale fulvous pubescent. Wings hyaline, with a fulvous tinge, veins 

 brown, stigma fulvous. Calypteres pale testaceous, halteres yellowish. 

 Abdomen much broader than the thorax, with 3 pairs of yellowish 

 spots, those of the 3rd and 4th segments being oblong and situated 

 nearly in the middle longitudinally, those of th 5th segment trans- 

 Verse, broader at the inner sides and touching the lateral sides. 

 Venter fuscous, the hind margins and lateral sides yellowish. Legs 

 yellow, coxae, the middle part of the hind tibia and the tip of the 

 same tarsus, fuscous. 

 Length — 7 mm. 



Hab. — Honshu (Iwate) ； one female specimen collected by Mr, 



Teizo Ogasawara. 

 Nom. Jap. ― Teizo-tsuy ahirataabu. 



8. Melanostoma ochiaianum Mats. 



(n. sp ) PI. I, fig. 12， 9 

 Somewhat resembles M. Orientale Wied., but differs from the 

 latter in the following points : 



Abdomen nearly as broad as the thorax, at the joint of the 

 2nd and 3rd segments being the broadest, the first spots oblong, 

 the 2nd and 3rd spots conical, not incurved at the outer side, while 

 the 3rd spots being somewhat incurved at the inner side, the 4th 

 spots semicircular, the spots of the 2nd and 3rd segments not touch- 

 ing the lateral sides. Venter fuscous, with yellowish spots, the 4th 

 segment yellow, with a fuscous stripe. 

 Length-— 7 nim. 



Hab. — Saghalien (Ochiai) ； one female specimen collected by 



Messrs J. A dach i and S. Isshiki. 

 Nom. Jap. 一 Ochiai- tsuy ahirataabu 



9. Melanostoma Orientale Wied. 



Syrphus orientalis Wied. Auss. Zweifl. vol. 11, P. 139. ひ 830), 



