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a 蟲 舉雜識 第 卷第蜜 fö? 



5. Melithreptus cvimdncus Say. 



Say: Syrphus cylindricus. Amer. Ent" 1814, I, p. 22 ； 



M AQUART ： Sphaerophoria contigna. Dipt.Exot., i846,supp.n, p.78. 



CoQUiLLET : Proc, Nat. Mus. U. S.A. p. 323, 1898. 



We have never seen tnis species in Japan. Marquart describes this 

 species as follows ： 



"Thorace nigro aeneo ; latenbus scutelloque flavis. Abdomine nigro 

 fasciis integris ； duabus ultimis contiguis." 



" Long. 4 Lin. ^. Voisin du Sphaerophoria taeniata. Face, front 

 et antennes jaunes. Abdomen : deuzieme segment a bände noire vers 

 le milieu ； troisieme fauve dans toute sa long"ueur, ä ね che longitudiimle 

 brune de chaque cöte; la bände du quärtneme an bord anterieur, pro- 

 longee en points; extericure atteignant le tiers de la discoidale." 



Hab. ― Honshu (Gifu) ； North America. 



Jap. name -ー Hoso-hime-hirataabu- 



We doubt whether this species really inhabits in Japan or not. It is 

 nearly as large as taeniata Meig., measuring 4 L. (8 mm.) in the male, 

 while in the latter species 3-4.5 L. 



6. Melithreptus takasag^ensis Mats. (n. sp.) 



(/V Vertex fuscous, face pale yellowish, with a pearl luster, in the 

 middle with a small black tubercle ； antennae orange yellow, the third 

 joints on its back somewhat infuscated, the arista brown, at the base 

 somewhat paler. Proboscis pitchy brown, at the apex orange yellow, 

 palpi pale yellowish. Occiput grayish, cheeks and orbit silvery pub- 

 escented- Thorax black aeneous, with pale fulvous hairs, on the lateral 

 margins yellowish, pro-, meso- and meta-, as well as sterno-pleurae pak 

 yellow^ with a pearl luster ； in the middle with 3 black stripes, but not 

 distinct. Scutellum orange yellow, with pale fulvous hairs, at the hind 

 margin with few fuscous hairs. Wings hyaline, with a dirty yellowish 

 shade, veins fuscous, at the base fulvous. Halteres pale yellowisU- 

 Abdomen black, at the apex fulvous, with black and pale fulvous hairs, 

 the second, third and fourth segments each with a broad yellow band, 

 sometimes the bands of the third and fourth becoming paler or indistinct, 



