ASARCINA.—SYRPUUS. 29 
reflexions; black-haired. Squamule yellowish; halteres white. 
Abdomen as in eremophila, second and third yellow bands margined 
on the sides by a black line; genitalia yellowish grey, pale-haired. 
Legs dark yellow, with black tarsi, the hind ones being yellowish 

Fig. 5.—Asarcina hirsuticeps, sp.n. Head of dg, x9. 
towards the base. Wings long, faintly infuseated, with dark 
yellowish stigma and black veins. 
Type 3, trom Busiku, British East Africa, 5.ix.1911 (2. J. 
Stordy). This species, which has nothing to do with the Indian 
genus Dideoides, Brunetti (1908), is a very important addition to 
the genus Asarcina. 
Genus 5. SYRPHUS, Fabricius (1775). 
The rather numerous species in the collection before me can be 
distinguished as follows :— 
1 (16) Eyes hairy ; postocular border fringed along 
its whole contour with lone and dense 
hairs; antennze wholly black, the third 
joint elongate and rather pointed at the 
tip; face always with a black spot or 
stripe in the middle. 
2 (5) Pterostigma entirely yellow, not blackened 
at base; face distinctly yellow, the dust 
not hiding the ground-colour ; peristoma 
rather broad and yellow. 
3 (4) Jowls with a black stripe running from the 
lower corner of eye to the upper edge of 
the buccal cavity; abdomen with four 
white bands, which do not reach the 
sides; third longitudinal vein straight ..  capens’s, Wied.* 
4 (3) Jowls wholly yellow, without black stripe ; 
abdomen with three yellow bands reach- 
ing the sides, the first widely interrupted 
in the middle; third vein sinuous, as in 
Lasiephthicus; abdomen very — short, 
black pilose except at base ........... . euteniatus, sp. 0. 
* Not in the collection, inclided only for comparison. 
