90 SYRPHID 4. 
antenne ; 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 antenne; antenne placed ona less prominent tubercle, 
yellow, the third joint elongate-oval, with a black upper border ; 
arista bare, long, yellow. Face densely yellowish pollinose, with 
yellowish hairs on the sides; the tubercle rounded, shining yellow, 
and hollowed below the antennz; on each side of the tubercle there 
isa 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 zeneous, not margined with black, 
the two lateral not broader than the middle ones and attenuated 
behind; hairs yellowish, dense, and long; pleure grey, with long 
grey or yellowish hairs. Squamulze brownish yellow, witha whitish 
fringe; halteres whitish. Seutellum yellowish, transparent, shining 
zneous 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 tibie 
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 Q, 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. HH. S. 
Stannus ). 
91. Eristalodes teniops, Wiedemann (1818). 
A Mediterranean species, widely spread over the Ethiopian 
Region, and readily distingmshed by its five dark bands on the 
eyes and by the very indistinct thoracic stripes, 
