﻿THE ENTOMOLOGICAL MAGAZINE, Vol. III. Pt. に 



25 



segments each in the middle with a small brownish spot, on the sides 

 being fuscous spotted. Legs yellow, the femur and tibia in the middle 

 somewhat infuscated. 



Length ― ピ 12 mm. 



Hab. ― Formosa (Horisha); one specimen collected by Prof- S. 

 Matsumura. 



3. Syrphus (Macrosyrphus) koannanius Mats. (n. sp ) 



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

 as follows : 



ビ Body much broader. Face yellowish pubescented, without bluish 

 tinge. Above the antennae with a broad fuscous arch. Thorax fuscous, 

 without a bluish tinge. Abdomen scarcely narrower than the thorax, 

 each yellowish bands reaching to the margin with its nearly whole sur- 

 face; the 3rd band short fnscous pubescented. Venter pale yellow, 

 subhyaline, without spots in the middle, only on the sides being fuscous 

 spott,ea and the 4th on the hind margin and the apex being fuscous. 

 Wings short, only the one fourth surpassing the abdominal apex. Lep-s 

 nearly the same. 



Length ― 13 mm. 



Hab. ― Formosa (Koannania Kaushirei) ； one ビ specimen collected 

 by Prof. S. Matsumura. 



4. Syrphus (Macrosyrphus) Kuroiwae Mats, (n.sp ) 



ビ 1 horax aeneous. Face pale testaceous, the tubercle scarcely in- 

 fuscated, paler pubescented. Front above the antennae in the middle 

 with a small brownish spot, fuscous pubescented. Antennae yellowish, 

 the 3rd joint on the back scarcely infuscated. Vertex fuscous, concolor- 

 ous pubescented. The distance between the anterior and posterior ocelli 

 somewhat less than the double length of the posterior ocelli each otlier 

 separated. Compound eyes pubescented. Thorax on tlie anterior m(m)in 

 with 3 darker stripes, on the sides and a lateral tubercle before the 

 scute Hum yellowish ； fulvous pubescented. Scutelluni on the anterior 

 half yellowish and on the posterior half fuscous pubescented. Wings 

 hyaline, veins fuscous, stigma fulvous. Calypteres whitish, halteres 



