﻿32 



見 蟲學雜 誌 第參卷 第壹號 



ßodv much larger. The 2nd and 3rd abdominal bands in the lemale 

 scarcely emarginated posteriorly, and each on the posterior one third 

 short fuscous pubescented. Each ventral segment with an angular 

 fuscous spot, the 3rd and 4th segments each on the hind margin with a 

 broad conspicuous fuscous band (in some individual not conspicuous). 

 Hypopygium yellow, in the middle with a small fuscous spot, brownish 

 pubescented. Venter with long yellowish and short black hairs. Hind 

 femora in the male, except the apical one third, fuscous, near to the base 

 densely fuscous pubescented. 

 Length ― 13-14 mm. 



Hab. ― Hokkaido (Sapporo), Honsnu (Nikko) ； 6 (2 ビ， 4 ^) speci- 

 mens collected by Prof. S. Matsumura. 



10. Syrphus (Syrphus) jezoensis Mats, (n.sp.) 



Much resembles to S. japonicus Mats., but differs from the latter as 

 follows : 



^ Body much smaller. Frontal angular spot larger and conspicuous, 

 on the sides grayish pruinose. Antennae paler, the 3rd joint on the back 

 mostly not infuscated. Halteres fuscous, the stems beinp^ whitish. The 

 2nd abdominal band on the hind margin not mixing fuscous hairs. 

 Ventral spots and bands similar, only with very long pale yellowish 

 hairs, the short fuscous hairs being very few. Hind femur much shorter 

 and less fuscous pubescented only down to the middle. 

 Lenp-th —— 12 mm. 



Hab. ― Hokkaido (Sapporo); 4 ^ specimens collected by Prof. S. 

 Matsumura. 



11. Syrphus (Syrphus) vitripennis Meig. 

 Syrphus vitripennis Meig. Syst. Beschr. Zweif. III. p. 308 (1822), 

 Syrphus confinis Zett. Ins. Lapp. p. 602 (1840). 

 Syrphus ribesii var. vitripennis Schin. Faun. Austr. Dipt. I, 

 p. 310 (1862). 

 Differs from S. libesii L. as follows : 



Body much smaller. Abdomen much narrower, the 2nd and 3rd 

 yellowish bands very finely pale yellowish pubescented, without short 



