SYRITTA. 105 
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(3) Hind femora with two or three other 
smaller spines on the basal half beyond 
the very strong basal spine ............ spinigera, Loew. 
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like the other veins; hind femora without 
basal spine or with a much shorter one ; 
yellow abdominal bands off male inter- 
rupted in the middle, at least the first ; 
third antennal joint entirely of a pale 
yellow colour ; ventral tuft less distinct. 
(10) Hind tibiz of the male simple; hind femora 
in both sexes not strongly armed towards 
the middle. 
(7) Hind femora pale yellow with black tips, 
and provided with a rather strong basal 
spine; pollen on the thorax in the female 
more yellow and present also in front of 
thescutellunay#. 112. Me SA YS WadbasW alls 
(6) Hind femora dark reddish, brown, or black, 
and without strong basal spine; thoracic 
pollen grey or whitish, entirely wanting 
in front otf the scutellum. 
(9) Smaller species with hyaline wings; yellow 
colour on the female abdomen more ex- 
tensive; hind temcra mostly black, ciliated 
and toothed below on the basal half .... fasciata, Wied. 
(8) Species of larger size, with slightly infus- 
cated wings; yellow colour in the female 
less extensive; hind femora reddish brown, 
not ciliate below, and nearly smooth on 
EUp MAGE A fats e.cdannce: «:exsrese weee.. stigmatica, Loew. 
10 (5) Hind tibiz of male beyond middle with a 
strong tubercle and a deep notch; hind 
femora in both sexes of a reddish colour 
with a black apex, with the strongest 
armature towards the middle ..... sav ce) eaustent, spi. 
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111. Syritta spinigera, Loew (1848). 
This species is the type of a small but well-defined group, the 
members of which are distinguished by the absence of the vena 
spuria, a character overlooked by Loew and pointed out for the first 
time by Thomson. All the other species of this group, and also 
the following, are perhaps only colour-varieties, such as armipes, 
Thoms., spinigerella, Thoms., vitripennis, Bigot, and perhaps 
nigricornis, Macq., the latter name having priority; since the 
abdomen of spinigera is often entirely yellow at the end, Loew's 
name may be a synonym of flaviventris, Macq. 
There are two males and three females from Howick, Natal 
(J. P. Cregoe), and a female from Johannesburg, Transvaal (A. J. 
Cholmley). 
