8S SYRPHID®. 
with yellow hair; pterostigma pale 
yellow and short. 
2 (5) Antenne yellow, the third joint darkened 
along the upper border or in the upper 
part ; dorsum of thorax strongly striped. 
3 (4) Facial tubercle black; eyes with four or 
three dark bands; femora mostly black , 
thoracic stripes shining and bordered 
with black; fourth abdominal segment 
without yellow band; upper facets of 
the eyes only a little larger than the 
lower ones ; occipital b: der i in the female 
broadly shining black above ..... wees. plurteittatus, Macq. 
4 (8) Facial tubercle yellow; eyes with five 
bands; femora mostly reddish yellow ; 
thoracic stripes not margined with black ; 
fourth segment usually with a yellow 
band; upper facets distinctly larger; 
occipital border grey pollinose ........ barelayt, sp. 2. 
5 (2) Antenne black, or only the third joint 
narrowly yellowish below; doysuin of 
thorax with less distinct or indistinct 
stripes. 
6 (7) Eyes with five to six narrow bands, and 
not spotted between; face with distinct 
laveralistripes........ +... ae ... tentops, Wied, 
7 (6) Kyes with three broad black bands and 
some spots between: face almost entirely 
black, the lateral stripes therefore not 
distinct saw 4eht. ah wai doxf.; Tuscicornis, Narsch, 
8 (1) Sentellum quite iiack, with a ahilarch tinge, 
entirely clothed with black hair; face 
with two very broad metallic shining 
stripes on the sides: abdomen without 
yellow bands; wings strongly infuscated, 
with a very elongate black stigma: 
squamule blackish ...... pivey ress vile! Seyohellarum, sp. 1 
&§. Eristalodes plurivittatus, Wacquart (1855). 
Easily distinguishable by the four thoracic stripes being shining 
and margined with black, and by the eyes, the upper facets of 
which in the male ave smaller than in the allied species, usually 
having four dark bands, 
This species seems to be widely distributed over the Ethiopian 
Region, but is more common on the West Coast. The eyes show 
rather numerous black spots between the bands. There are some 
specimens in which the bands on the eves are only three in number, 
the first (or that nearer the antenne) being wanting or only 
faintly indicated; these specimens are usually of smaller size. 
Some of them, which appear to be immature, have pale reddish 
femora, reddish peristoma, and also often the lower portion of the 
facial tubercle yellowish. The yellow band on the second abdo- 
minal segment is rarely wanting; the grevish-white bands on the 
