90 SYRPHIDJE. 



antennae ; lunula yellow ; frons of female wholly pollinose, even on 

 the ocelli ; clothed with dense yellowish hair, blackish only in a 

 band before the ocelli, the transverse black band wanting or less 

 distinct ; a thin black middle line in front, which becomes yellow 

 above the antennae ; antenna placed on a less prominent tubercle, 

 yellow, the third joint elongate-oval, with a black upper border ; 

 arista bare, long, yellow. Face densely yellowish pollinose, with 

 }^ellovvish hairs on the sides ; the tubercle rounded, shining yellow, 

 and hollowed below the antennae ; on each side of the tubercle there 

 is a shining black line ; peristoma narrow, shining black, with white 

 hairs behind, reddish before the edges of the buccal cavity; opening 

 of the buccal cavity broad, proboscis black. Thorax black, yellowish- 

 grey pollinose, with sharply defined black stripes in both sexes ; 

 these stripes are rather shining aeneous, not margined with black, 

 the two lateral not broader than the middle ones and attenuated 

 behind ; hairs yellowish, dense, and long ; pleurae grey, with long 

 grey or yellowish hairs. Squamulae brownish yellow, with a whitish 

 fringe ; halteres \vhitish. Scutellum yellowish, transparent, shining 

 aeneous above, darkened at the base, yellowish pilose, with a trans- 

 verse band of black hairs near the base. Abdomen yellow, and 

 yellowish-grey pilose ; first segment grey ; second with a narrow 

 even black fore border and a broader one on the hind margin, which 

 is attenuated at the sides and triangularly broadened in the middle, 

 where it unites with the fore border, the yellow band being there- 

 fore interrupted in the middle ; third and fourth segments similarly 

 coloured, but the yellow bands narrower, chiefly in the female, and 

 besides with a complete transverse whitish band near the fore 

 border; the hind borders of the black bands are shining, chiefly 

 near the middle ; the abdomen is more yellow in the male than in 

 the female ; venter yellowish, blackened at the base and at the 

 tip ; genitalia of the male shining black. Legs reddish, the tibiae 

 pale yellowish, the femora darker, those of the hind pair blackened 

 at the base and above ; hairs pale ; hind femora thin ; tarsi 

 darkened at the apex. Wings hyaline, not pubescent, with typical 

 venation ; marginal cell with a short stalk ; stigma pale yellow, 

 black at the base and more narrowly at the end ; upper fore 

 corner of the second basal cell roundly dilated ; small cross-vein a 

 little beyond the middle of the discal cell ; this last cell appendi- 

 culated. 



Type <$ and type $ , and four additional specimens from Nyasa- 

 land, Fort Johnston, 2,000 ft., dry season, vi. 1910, collected by 

 Dr. A. H. Barclay, in whose honour the species is named ; besides 

 a female from Lake Chilwa, Nyasaland, iv. 1910 (Dr. H. S. 

 Stannus^. 



91. Eristalodes taeniops, Wiedemann (1818). 



A Mediterranean species, widely spread over the Ethiopian 

 Region, and readily distinguished by its five dark bands on the 

 eyes and by the very indistinct thoracic stripes. 



