﻿THE ENTOMOLOGICAL MAGAZINE Vol II 



139 



well as the same tibiae yellow, the hind femur at the apex and the same 

 tibia at the base dirty yellow. 



Length 14-15 mm. 



Hab. ― Saghalien, Honshu ； not rare. 

 The following syrphid is not known to us. 



4. Didea confrater Wied. 

 Syrphus confrater Wied. Auss. Zweif. 11. p. 120, 5 (1822). ノ 

 Didea confrater Sack. Ent. Mitt. II. Nr. i. p. 2 (1913). 



d ¥ Front in the male short yellowish pubescented ； above the 

 antennae with shining aeneous arch ； compound eyes touch in a long line, 

 aeneous triangle of the vertex short and broad. In the female front 

 black, yellowish pruinose, so that in the middle a narrow black stripe 

 may be seen ； above the antennae with a black arch. Vertex aeneous, 

 with a violet luster. Front black pubescented, not very long. In both 

 sexes compound eyes naked Hairs of the occiput golden yellow, on 

 the sides pale yellowish. The first antennal joint yellow, longer than 

 the 2nd, the 2nd and the 3rd (oval in form) brown, the latter at the lower 

 part yellowish. Face yellow, the facial tubercle in the female somewhat 

 infuscated ； cheeks somewhat brownish pubescented. Proboscis short 

 and stout, brown. Thorax shining, in the male aeneous, in the female 

 dark, with a bluish shade, pleurae and sternum greenish yellow, shininp-; 

 golden yellow pubescented, the hairs on the sides being longer and 

 denser. Scutellum yellow, with a bluish shade, densely and long fuscous 

 pubescented. Legs yellow, the hind femur externally with a brown stripe ； 

 tarsi, except the metatarsi, brown or black ； in the female the brown or 

 black parts being more extended. Wings hyaline, between the auxiliary 

 and the first longitudinal vein yellow or brownish, the 3rd longitudinal 

 vein like that of aegrota F. Abdomen flat, distinctly ridged, black, in 

 the middle of the 2nd -4th segments each with a yellow band, of which 

 the first band in the middle anteriorly and posteriorly deep emarginated, 

 and on the siaes rounded. In the female the bands narrower than in the 

 male; the following other bands also on the sides posteriorly rounded, 

 each reaches to the side with its anterior half part. Hairs very short 

 and sparse, yellow or fuscous; on the side with dense standing fuscous 



