﻿THE ENTOMOLOGICAL MAGAZINE, Vol. III. Pt. 雇憲 I & IV. 137 



ビ. Aeneous black. Face grayish pruinous, pale yellowish 

 pubescent, front with brownish hairs ； proboscis fuscous ； antennae 

 yellow, the 3rd joint on its apex fuscous, the 1st joint brownish 

 arista yellowish, at the apex scarcely infuscated. Thorax and 

 scutellum pale fulvous pubescent ； wings hyaline, scarcely infuscated, 

 veins fuscous, stigma fulvous. Calypteres testaceous, lialteres orange- 

 yellow. Abdomen black, with 3 pairs of yellowish quadrate spots, 

 one pair of which at the 2nd segment being smaller and not 

 touching the lateral margins ； venter paler, but simillarly marked 

 as above, pale yellowish pubescent. Legs yellow, middle part of 

 the Jnind tibia, as well as the tip of the hind tarsus, fuscous. 



^ Differs from the male in the following points : 



Vertex and front shining black, with an indigo luster, on the 

 sides grayish pruinous. Abdomen somewhat broader than the thorax, 

 with 4 pairs of yellowish spots, those of the 2nd segment being 

 smaller and generally of an oblong form, those of the 3rd and 4th 

 inversed triangular, that of the 5th transverse and at the lateral 

 sides somewhat broader ； markings of the venter are not constant, 

 sometimes with a black longitudinal stripe, sometimes black, with 

 yellowish spots, and sometimes entirely fulvous, etc. 



Length — (/^ ^ 6.8 — 8 mm. 



Hab. ― Saghalien, Hokkaido, Honshu, Shikoku, Kiushu, For- 

 mosa ； China, Philippines, E. India. , 

 Norn. Jap. — Tsuya-hirataabu. 



This is very variable species, perhaps mingling- some different 

 species (but I hesitate to make any new species), and it resembles 

 much European M gracile Meig. 



10. Melanostoma ogasawarae Mats. (n. sp.) PI. i, fig. 5, ig. 



Black, shining. Face grayish pruinous, with fine whitish 

 hairs ； vertex and front fuscous pubescent. Antennae yellow, the 

 3rd joint on its back and at the tip infuscated. Thorax and scutel- 

 lum very fine pubescant. Wings hyaline, with a fulvous tinge, 

 veins brown, stigma fulvous. し alypteres whitish, lialteres fulvous, 

 the head in the middle scarcely infuscated. Abdomen distinctly 



