﻿THI EHTOMOLOGICÄli MAGAZIM 



Vol. IL] FEBRUARY, 1917. [Px. IV. 



3- 



昆蟲 學雜誌 第貳卷 第四號 



SYNOPSIS OF THE ECONOMIC SYEPHIDAE 

 OF JAPAN. (Pt. II ) 



BY PROF. S. MATSUMURA , & JIRO ADACHI. F. E.S.J. 

 曰 本 有用 食蚜蠅 科の 分類 * (第二） 



堙學 博士 松 衬松年 大日 本 a 蟲學 會タ Ä Z 



農學士 足 立ニ郞 大日 本 昆蟲舉 せ々 



Table of genera related to Syrphus F. 



Thorax on each side with a yellowish stripe 



Thorax on each side without a yellowish stripe 



The 3rd antennal joint conical ； the 3rd longitudinal vein opens 



before the apex 



The 3rd antennal joint round ； the 3rd longitudinal vein opens 



in the apex Xantbogramma Schin. 



The 3rd antennal joint much shorter than the first and 2nd 

 taken together; in the male trochanter without a tooth-like 

 projection Asarcina Macq. 



The 3rd antennal joint 3 times as long as the first and 2nd 

 taken together; in the male trochanter with a tooth-like 

 projection に ..， Ischiodon Sack. 



The 3rd antennal joint round ； the cross -vein at about 'ん of the 

 discoidal cell near the base 



The 3rd antennal joint oval ； the cross-vein at i, ぶ- 》《 of the 

 discoidal cell near the base 



The 3rd antennal joint conical ； the cross-vein at about of 

 the discoidal cell near the base 



槠 ^ It (153; 頁 に 在 り ― ■ 



