S65 SYRPHID 2. 
Abdomen clothed with very short pale hair, a little longer on the 
sides ; first segment whitish, with a black spot below the scutellum, 
and a very narrow black hind border continuous with the fore 
border of the second segment; this segment whitish, with a broad 
dull black hind border, narrowed towards the sides and shining 
near the hind margin; third and fourth segments shinmg neous 
black, with a broad dull black band across the middle, and on the 
fore part of this band with a narrow curved whitish band, which 
does not reach the sides; last segment entirely shining zeneous ; 
venter black, grey pollinose. Femora and tarsi fens fails 
whitish, the hind ones reddish on the apical half; there are no 
actual black markings on the femora, although these joints bear 
darker patches ; the hairs are white, black on the femora and partly 
on the hind tibie. Wings hyaline, slightly yellowish, with 
vellowish veins and typical venation ; discal ‘cell with a short 
appendix; stigma yellow, with the usual two small black spots ; 
marginal cell short-stalked. 
Type Q, a single specimen from 1 be est Africa, Obuasi, Ashanti, 
“caught hovering over pond” (Dr. M. Graham). 
86. Lathyrophthalmus vicarians, sp. n 
d. Length of the body 10 mm. 
Near the preceding species, but distinguished by the abdomen 
being vellow, with narrow dull black bands, and by the hind tarsi 
being black at the tips. 
This species is very like the Oriental guénquestriatus, Fabric ius, 
from which it differs chiefly in the colour of the legs. 
Head black, densely covered with yellow pollen, which entirely 
conceals the ground-colour; vertical triangle very small, dark- 
haired ; eyes purplish red, shining towards the middle, covered 
with small black spots, which are confluent on the upper part; the 
eyes are clothed on the upper half with short brown hair, and meet 
together for a distance equal in length to the frontal triangle ; the 
upper facets are distinetly larger “than those of the lower part ; 
frontal triangle broad and rounded, with long but sparse dark 
hairs; facial tubercle yellowish, not very prominent; pollen on 
the face disposed in waves on the sides, which are also clothed 
with short yellowish hair; peristoma narrow, not produced, 
shining yellow towards the edges of the buccal cavity; epistoma 
not deeply bilobate ; opening of buccal cavity short and broad : 
antennz entirely yellow, the third joint ovate, with a dark upper 
border ; arista long, bare, dark yellowish on the base; hairs on the 
peristoma yellowish behind. Thorax yellow pollinose, on the 
dorsum with four distinct dull black stripes, of which the lateral 
ones are only as broad as the dividing stripes; all the stripes taper 
off before the scutellum ; hairs long, yellowish; pleuree grey, meso- 
and sternopleura partly dark. Scutellum yellow and clothed with 
vellow hair, with the broad band of black hair very well marked. 
Squamule blackish ; halteres vellowish. Abdomen entirely vellow, 
