86 SYRPHIDJE. 



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 shining aBneous 

 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 aeneous ; 

 venter black, grey pollinose. Femora and tarsi reddish, tibia? 

 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 tibia?. Wings hyaline, slightly yellowish, with 

 yellowish veins and typical venation ; discal cell with a short 

 appendix; stigma yellow, with the usual two small black spots; 

 marginal cell short-stalked. 



Type $ , a single specimen from West Africa, Obuasi, Ashanti, 

 " caught hovering over pond " {Dr. W. 31. Graham}. 



86. Lathyrophthalmus vicarians, sp. n. 



c? . Length of the body 10 mm. 



Near the preceding species, but distinguished by the abdomen 

 being yellow, with narrow dull black bands, and by the hind tarsi 

 being black at the tips. 



This species is very like the Oriental quinquesfriatu, Fabricius, 

 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 distinctly 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 ; 

 antennae 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 ; pleura? grey, meso- 

 and sternopleura partly dark. Scutellum yellow and clothed with 

 vellow hair, with the broad band of black hair very well marked. 

 Squamnlse blackish ; halteree yellowish. Abdomen entirely yellow, 



