﻿THE ENTOMOLOGICAL MAGAZINE Vol. IB. 151 



Hab. 一 Hokkaido (Sapporo) ； only one ビ specimen collected by 

 the authors. 



Compared with the European species, the Japanese one being provid- 

 ed with the smaller spots on the 2nd abdominal segment. 



5. Metasyrphus stenopus Mats, (n.sp.) 



Much resembles to M. arcuatus Fall, but differs from the latter as 

 follows : 



ピ Cheeks aeneous black, the facial stripe reaches to the middle of the 

 face. Thorax aeneous black. Abdomen narrower, a 丄 は tie broader than 

 the thorax, lunules narrower, the first spots nearly straie^ht, somewhat 

 narrower towards the inner margin and truncated, the 2nd spots nearly 

 in the middle of the 3rd segment, more concave at the anterior margin ； 

 venter with 3 large rectangular fuscous spots. 

 Length ― 1 1.5 mm. 



Hab. ― Hokkaido (Sapporo); i ビ specimen collected by Prof. S. 

 Matsumura. 



6. Metasyrphus corollae F. 

 Syrphus corollae F. - Ent. Syst. IV, p. 306, 106 (1792); Meig. - 

 Syst. Beschr. III, p. 304， 46 (1822); Wied. - Auss. Zweifl. II, 

 p. 121, 7 (1830); MACQ.-Suit. ä Buff. I, p. 539. 18 (1834)； 

 CoQ. - Proc. Nat. Mus. XXI， p. 321 (1896); Mats. - Thous. 

 Ins. Jap. II, p. 90, PI. XXV, fig. 6 (1904)； Sack - Ent. Mitt. 

 II, P. 5 (1913), 



Aeneous black. Face yellow, with a brownish tubercle, pale yellow- 

 ish pubescented, vertex black, front with black hairs, in the female above 

 the antennal-insertions each witli a brownish spot (often not distinct); 

 cheeks grayish black, in the male oral margin often black ； antennae 

 yellowish brown or brown, beneath paler, the arista yellowish brown, 

 which being situated somewhat nearer to the base than on the other 

 species. Thorax aeneous black, on the sides and a lateral tubercle 

 before the scutelliim dirty yellow, yellowish pubescented. Scutellum 

 waxy dirty yellow, with pale yellowish hairs. Wings hyaline, with a 

 yellowish tinge, veins fuscous, stiprna and base dirty yellow. Calypteres 

 and halteres pale-yellow. Abdomen in the male somewhat and 111 the 



