140 SYRPHIDE. 
reddish and less distinct, instead of broad and yellow, the first 
abdominal segment bright yellow with a black median spot, and a 
vellow ring on the middle. of the hind femora. The dark costal 
border of the wings is not so black as in Saunders’s figure, but pale 
brownish yellow and darkened towards the end, as stated in 
Saunders’s description. 
Asingle female specimen from Mid-Luangwa R., N-E. Rhodesia, 
25, vin. 1910 CS. A. Neave), measuring 16 mm. in length, with- 
out antenne. The type was obtained in Katanga. 
443. Cerioides neavei, sp. 1- 
dg. Length of the body excluding the antenne 16 te 17 mnt. 
Closely allied to C. hope? and to the preceding species, but distin- 
cuished by the face and the pleural stripes being red instead of 
bright yellow, by the facial stripe being broadly bordered with 
black, and by the broadly yellow hind femora. I think, however, 

Fig. 28.— Cerioides neavet, sp.n., do. xX 3. 
that it is quite possible that the present and preceding species are 
only colour-varieties of C. hope?, Saunders ; C. ammophilina, Speiser 
(1910), seems also to be a very closely allied species. 
Head wholly red, passing to yellow ish on the sides of the face ; 
on the middle of face there isa yellow stripe, running from the base 
of the antennal petiole to the margin of the buceal cavity, but not 
reaching the latter; this stripe becomes broader towards the middle, 
and is bordered by black lines, which are brownish beneath; face 
below with no trace of black bands, which are likewise absent on 
the jowls; frontal triangle with an indistinct median longitudinal 
