﻿THE ENTOMOLOGICAL MACiAZINE. Vol. III. Pt. に 



31 



8. Syrphus (Syrphus) ribesii L. 

 Musea ribesii L. Faun. Succ. 1746. 



Syrphus ribesii F. Ent. Syst. IV, p. 304, 100 (1775) ； Meig. 



Syst. Beschr. Ill, p. 306 (1822); Schin. Faun. Austr. 

 Dipt. I， p. 310 (1862). 

 Thorax aeneous black, not shining. Face pale yellow, tubercle and 

 the oval margin deeper in colour, oaler pubescented. Antennae brownish 

 yellow, on the back fuscous. Front above the antennae with a fuscous 

 zigzag arch, black pubescented ； in the female sending a fuscous stripe up 

 to the vertex, and on the side grayish pruinose ； vertex short and fuscous. 

 Antennae yellow, the 3rd joint on the back somewhat infuscated. 1 horax 

 somewhat yellowish, in the middle with 3 indistinct darker stripes, fulvous 

 pubescented. Scutellum fuscous pubescented, mixing some yellowish 

 hairs on the margins. Wings hyaline, often with a yellowish ting-e. 

 Calypteres prayish and halteres pale yellowish, the latter often infuscated 

 on the knobs. Abdomen elliptical, with 3 yellow bands, of which the 

 first being interrupted, the 2nd and 3rd each on posterior margin in the 

 male deeplv and in the female scarcely emarginated posteriorly ； all the 

 bands reaching to the lateral margin with their upturned apices ； the 

 hind marc-ins of the 4th and 5th, except a black spot in the middle, 

 yellow, the 5th scarcely transversely wrinkled. Hypopygium aeneous 

 black, yellowish and fuscous pubescented. Venter pale yellow, with a 

 fuscous angular spot in the middle of each segment, on the sides also 

 fuscous spotted ； very long pale yellowish pubescented, mingling very 

 few short fuscous hairs. Legs yellow, coxae, trochanter and the bases 

 of femora (in the female more extended) black, the tarsi brownish; the 

 hind femur 011 the apical half short black pubescented, not mixing 

 yellowish hairs. 



Length ― ビ f 12-13 mm. 



Hab. ― Saghalien, Hokkaido, Honshu, Kiushü, Formosa ； Siberia, 

 Europe. 



9. Syrphus japonicus Mats, (n sp.) (pi. i, fig. 13 ひ、 ん） 

 Much resembles to S. ribesii L., but differs from the latter as follows. 



