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



23 



一 Three ocelli making nearly equilateral triangle ； the ； 3 id longitud- 

 inal vein opens exactly in the apex parasyrphus n. 



Subg. Macrosyrphus Mats. 

 Compound eyes bare or pubescented. In the male the upper facets 

 being subequal to those of the lower part. Vertex of the male very- 

 narrow, nearly as long as the touched portion of the compound eyes. 

 The anterior ocellus smaller and the distance from the posterior ocelli is 

 nearly the double (sometimes less and sometimes more separated) length 

 of the posterior ocelli each other separated. The 3 i d longitudinal vein 

 opens a little before the apex. 



Type — Syrphus okinawae Mats. 



Table of species- 



1. Compound eyes pubescented 2 



一 Compound eyes bare 3 



2. Abdomen aroadest at the hind margin of the 3rd segment ； anterior 

 half of the scutellum yellowish pubescented ... Kuroiwae n. sp. 



― Abdomen broadest at the hind margin of the 2nd segment; scu- 

 tellum nearly entirely fuscous pubescented ... hakiensis n. sp. 



3. The first abdominal band interrupted aino n. sp. 



一 1 he first abdominal band not interrupted 4 



4. Abdomen on the lateral sides entirely fuscous pubescented ... 



okinawae n. sp. 



< ^ Abdomen on the lateral sides yellowish and fuscous pubescented. 5 



5. In the male abdomen distinctly broader than the thorax ； ab- 

 dominal bands reaching with their upturned apices to the lateral 

 margin horishanus n. sp. 



- ~ In the male abdomen not broader than the thorax ； abdominal 

 bands reaching to the lateral margin with the whole or two- 

 thirds of their surfaces koaiinanius n. sp. 



1. Syrphus (Macrosyrphus) okinawae Mats. (n. sp.) 



. (PI. I， fig. 11 もん） 

 ^ Thorax golden green. ^ Face pale yellow, without facial stripe, paler 



pubescented. Front yellow, fuscous pubescented, vertex fuscous. Anten- 

 nae yellowish, the antennal joint on its back and at the apex fuscous 



