﻿40 



昆蟲 學雜誌 第參卷 第' 窗： 號 



with a black arch, luscous pubescented. Antennae brown, the basal 2 

 joints being fuscous. Thorax fulvous pubescented. Scutellum dirty 

 yellow, fuscous pubescented, mixing a few pale yellowish hairs on the 

 sides and at the hind margin. Wings hyaline, prayish yellow suffused, 

 veins fuscous, stigma fulvous, neary ^ surpassing the abdominal apex. 

 Calypteres and halteres pale yellowish. Abdomen somewhat broader 

 than the thorax, much narrowed towards the base ； with 3 yellowish 

 bands, of which the first one being widely separated in the middle and 

 reaching to the lateral side with its upturned apex, the 2nd and 3rd bands 

 each near the anterior margin of the respective segment, at the anterior 

 margin nearly straight, on the hind margin deeply triangularly emargin- 

 ated, reaching to the side with its upturned apex; the hind margin of 

 the 4th and 5th narrowly, and a triang-ular spot on each side of the 5th, 

 yellow ； yellowish and black pubescented, the 3rd and 4th bands mingi- 

 ing some black hairs. Venter pale yellow, the 2nd — 4th segments each 

 with a small fuscous spot; on the sides fuscous spotted. Hypopyi^ium 

 black and concolorous pubescented. Legs fuscous, the anterior 2 femora 

 at the apices and the tibiae largely yellowish. 

 Length —9-10 mm. 



Hab. ― Honshü (Nikkö) ； 6 ビ specimens collected by Prof. S 

 Matsumura. 



24. Syrphus (Parasyrphus) nigrigena Mats. (n. sp ) 



ピ fhorax aeneous black. Face yellow, without black stripe, in the 

 middle short yellowish and on the sides long brownish pubescented ； 

 cheeks and the larger part of the oval margin black, with yeilowish hairs. 

 Front olivaceous, above the antennae with a black arch ； vertex black, 

 black pubescented. Antennae pale yellowish brown, the 3rd joint on 

 its back somewhat darker; the arista brownish. Thorax with 3 narrow 

 darker stripes, on the sides yellow, fulvous pubescented Scutellum 

 waxy yellow, fuscous pubescented, mingling some yellowish hairs on 

 the margins. Calypteres and halteres testaceous. Wines hyaline, veins 

 fuscous, stigma fulvous. Abdomen black, a little broader than the 

 thorax, with 3 yellow bands, of which the first band beinp- broadly inter- 

 rupted, each triangular in form, reaching the side with its two thirds of 



