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見 逸 學雜誌 第！^ 卷 第壹號 



5. Emnerus iwatensis Mats. (n. sp.) 



53lack, with a dark bluish tinge. Head grayish pruinose, with short 

 grayish white hairs, in the male frontal triangle whitish. Antennae 

 orange yellow, the third joint on its back and the arista fuscous, the 

 latter at the base being yellowish. Proboscis brownish, palpi grayish 

 yellow. Thorax shining^ with very few grayish hairs, scutellum on the 

 hind margin fuscous, where with many short longitudinal ridges. Wings 

 hyaline, with a grayish tinge, veins fuscous, stigma pale yellowish, 

 stronpiv iridescent. Halteres pale grayish yellow. Abdomen narrow, 

 linear, the second and third segments each with 2 pale yellowish spots, 

 those of the second being somewoat larger, the fourth on each side with 

 a whitish spot, with whitish hairs. Legs black or fuscous, knees, both 

 ends of tibiae and 4 anterior tarsi, except apices, yellowish. 



Length 一 5-6 mm.; exp. 10 mm. 



Hab. ― Honshü (Karumai in the Prov. I wate) ； 2 (i and I ^) 



specimens collected by Mr. Teizo Ogasawara. 

 Jap. name 一 Iwate-mado-hirataabu. 



Genus 6. Melithreptus Loew. 

 LoEw : Isis. 1840 573 (1840). 



Musca L. ； Syrphus Latr ， Meig.; Scaeva F. and Fall.; Sphae- 



rophoria St' Farg.， Serville, Macq., and Zett. 



Slender, black or metallic green species, with yellow bands on the 

 abdomen and yellow lateral stripes on the thorax. 



Head hemispherical, broader than the thorax; antennae shorter than 

 the head, quite widely seoarated each other, on tiie back of the third 

 joint with an arista, which being somewhat pubescented. Proboscis 

 quite long, with narrow sucking surface, palpi small and filiform. Face 

 yellow, somewhat projected below, with a small tubercle, with or without 

 a middle black stripe. Compound eyes bare, those of the male hoi optic 

 and of the female dichoptic. Thorax long, quadrate, with yellow lateral 

 stripes and yellow or whitish spots on the sides. Scutellum yellow. 

 Abdomen slender, very long, tapered posteriorly (^) or club-shaped with 

 a projecting hypopygium, swollen like a ball on the underside, on the 



