﻿THE ENTOMOLOGICAL MAGAZINE, Vol. III. Pt, I. 



19 



I 



the latter somewhat aeneous. Scutellum yellow, black pub じ scented, on 

 the hind maivi ひ with yellowish hairs. Wings hyaline, with a fulvous 

 tinge, veins brown and stiema yellowish brown. Calyptercs whitish, 

 halteres oi'anp"e-yellow. Abaomen black, with 4 yellow bands, of which 

 the first being" interrupted in the middle, the others not interrupted, entire 

 and reach to the lateral margin, with short stout black hairs, mingling 

 some soft decumbent pale yellowish hairs. Venter pale yellowish, short 

 stout brownish pubescented, in some individuals in the middle with a 

 short brownish stripe. Leo's yellow, the hind legs larp'ely fuscous, only 

 the coxa, trochanter and the basal half of the femur being" yellowish. 

 Length 一 ^ 8 - 10 mm. 



Hab. — Saghalien (4 ^ specimens collected by the authors) ； Siberia, 

 Europe. 



. We have not yet captured this species in Hokkaido, most probably it 

 may be found in the north-eastern coast of Hokkaido. 



Mesosyrphus Mats. (n. g.) 

 Near StenOSyrphuS, but differs from tlie latter as follows : 

 In the female vertex much broader, in the male vertex very small, 

 highly elevated, nearly l4 as long as the touched portion of the compound 

 eyes. Ihe 3rd antennal joint roundish oval, distinctly lonp-er than the 

 first and 2nd taken together. Facial tubercle in a same level with the 

 antennal-process, in the male not beak-like produced. Compound eyes 

 pubescented. Abdomen in the female much broader than thorax, in the 

 male somewhat in the same breadth. 



Type ― Mesosyrphus constrictus n. sp. 

 We have in Japan the following one species. 



1. Mesosyrphus constrictus Mats, (n.sp.) (pi. I. fig. 9 り 



Black. Face orange-yellow, with a broad shining black stripe, which 

 reaches nearly up to the antennae ； oval margin fuscous, cheek with a 

 fuscous spot ； sparsely pale yellowish pubescented, mingling a few fuscous 

 hairs on the fuscous stripe. Front and vertex bluish black, in the female 

 between the front and vertex with a yellowish pruinose fascia, fuscous 

 pubescented. Antennae black, the 3rd joint brown, the arista except the 



