ERISTALIS. 93 
94. Eristalis tenax. Linné (1758). 
This almost cosmopolitan species is recognisable at once by the 
two bands of brown hairs on the eyes. 
It seems to be not common in South Africa, perhaps because it 
has only recently been introduced. T'wo female specimens only 
from Stellenbosch, Cape Colony, xi. 1904 (G@. A. AK, Marshall). 
95. Eristalis dasyops, Wiedemann (1819). 
In general aspect very like the preceding, but differing in the 
unicolorous hairs of the eyes and the yellow hind femora, which 
are black towards the apex. 
This species is perhaps a Protylocera with pubescent eyes, the 
shape of the head and the pale rounded spots on the eyes being 
the same as in that genus; besides the wings are pubescent, the 
marginal cell is short-stalked, and the kink in the third vein is 
angular and provided with the rudiment of an appendix (v. the 
notes-in my paper on Fea’s Syrphids, p. 432). The present species 
is probably congeneric with the following, but not with the 
preceding. 
A female specimen from Obuasi, Ashanti, 31. vii. 1907 (Dr. W. 
M. Graham). 
Eristalis meromacriformis, sp. n 
. Length of the body 14 min. 
y ery distinct from any other species on account of the apical 
brown spots on the wings. ‘This species shows a great resemblance 
to the American genus ‘Mer omacrus in the pubescence and pattern 
on the wings, in the eyes of the male, in the hind femora, and in 
shape of the abdomen; but the eyes are hairy and the face has a 
well-developed tubercle. I place it for the present in Evistalis. 
Milesia maculata, Macquart (1849), stated to be from Africa, which 
was in my catalogue placed in Meromacrus, while in Kertész’s it is 
left in Aflesia, is without any doubt the American Jleromacrus 
cruciger, Wied.; the present species, although showing a rather 
similar pattern on the wings, is very different, owing to the want 
of any golden-yellow marking. 
Head black, the lower portion of the face and the peristoma 
reddish ; frontal triangle of the male very SOUS attenuated in 
front, dark grey pollinose, and with pale hairs eyes dark red, 
slightly shining towards the middle, entirely nee with whitish 
hairs, without any distinct pattern and also without the pale spots 
of Protylocera ; they are approximated at a point midway between 
the antenne and the vertex, but not in contact; frontal triangle 
erey pollinose, elongate, with long pale hairs directed forwards : 
Junula reddish ; antenna placed on a tubercle as in Profylocera, 
the basal joints reddish, the third brownish, elongate-oval, with a 
long and bare, dark reddish arista ; face reddish, blackish above 
and on the sides, where it is grey tomentose and clothed with 
sparse and short pale hairs; .it is deeply excavated below the 
