﻿THE ENTOMOLOCilCAL MAGAZINE, Vol. 111. Pt. I. 



29 



They are very common in the latter part of June, especially in the 

 environs of Sapporo ； they do not differ from the European specimens in 

 size, only the uoper facets of the male somewhat larger than those of 

 the European. 



Subg. Syrphus Mats. 



Compound eyes bare (sometimes microcopically sparsely pubescented) 

 or distinctly pubescented; in the male the upper facets subequal to those 

 of the lower. Vertex nearly as long as the touched portion of the com- 

 pound eyes ； the anterior ocellus scarcely smaller than the posterior ones, 

 the distance from the latter being distinctly longer than that of the 

 posterior ones. The 3rd longitudinal vein opens distinctly before the 

 apex. 



We have in Japan the following 10 species. 



Table of species. 



1. Compound eyes densely pubescented; face with 2 fuscous stripes- 



bilineatus n. sp. 



― Compound eyes not pubescented 2 



2. Antennae entirely black mikado n. sp. 



一 Antennae yellow, at most the 3rd joint on the back fuscous. ... 3 



3. Scutellum yellowish and fuscous pubescented 4 



― Scutellum except the margins fuscous pubescented 7 



4. Thorax very much polished 5 



一 1 horax not polished … • ••- 6 



5- Scutellum with mixed yellowish and fuscous hairs 



••• nitidicoUis Meig. 



—一 Scufellum yellowish pubescented, only on the hind maroin with 

 fuscous hairs Shibakawae n. sp. 



6. Facia 丄 tubercle of the male much higher than the antennal- 

 proeess ； scutellum yellowish pubescented, -only on the hind mar- 

 gin with fuscous hairs akakurensis n.sp. 



一 Facial tubercle of the male nearly in the same level with the an- 

 tennal-process ； scutellem with mixed yellowish and fuscous hairs. 



daiyagawanus n.sp. 



