GO SYRPHID- EF. 
two yellow stripes, thus forming a perfectly quadrate black median 
spot; the other segments black, the third bearing sometimes a 
pattern like that of the second, or with a more or less broad yellow 
spot; venter black, yellow towards the middle at the base; male 
genitalia black. The four front legs are yellow, but the cies and 
fe mora, except the ends, are black, the front femora besides are 
yellow on the anterior surface ; middle tarsi very charac ‘teristic, 
the basal joint being in the male disciform, nearly circular, and in 
the female not dilated; but much shorter than in the females of 
the two preceding species ; hind legs strong and thick, black, the 
femora yellow at each end, the tibiz unarmed externally, the tarsi 
yellow ; the hairs are dense and short ; first joint of front tarsi with a 
black basal stripe (as in Rhingia), which is often indistinct. Wings 
with a faint brownish-yellow ee stigma darkened at the base ; 
ie ‘re is a single broad middle band, begin ming at the fore Hodes 
before the end of the first vein and ending towards the apex of the 
diseal cell: there is besides sometimes a trace of an indistinct 
short second band along the subapical cross-vein. 
Type 3 ,another specimen, and type 2 from Oshagbo, 8. Nigeria, 
RALVLON De. Donk? Gt. Mayer ); a female from Tlesha, S. Nigeria, 
23. vil. 1910 (Capt. L. #. Humfrey); two females from Obuasi, 
Ashanti, 7-80. vil. 1907 (Dr. W. AL. Graham). 
SQ 
3. Graptomyza nigra, sp. 1 
3 2. Length of ey 8 mm. 
Near the preceding species, but darker, with broader facial 
stripes, the base of the seutellum black, and the abdomen not 
golden. 
~ Head as in G. aurea: the four frontal yellow spots are very 
small and separated ; the median facial stripe is shining biack and 
very broad, the face therefore appe: aring to be black with two 
vellow stripes: third antennal joint entirely black, with a yellow 
and shortly plumose arista; eyes cl lothed with long whitish hairs. 
Thorax as in the preceding species, but with shorter pubescence, 
which is grey and not golden; the yellow markings are less 
developed, there is no spot inside the humeral callus, the sutural 
streak is smaller. and the mesopleural stripe is very narrow; 
seutellum as in G. aurea, but shining black on the basal halt. 
Squamule whitish and with a white fringe. Abdomen as in the 
preceding species, but the pubescence is grey, mixed with black 
hairs towards the end of the fourth segment; it is black, with only 
two parallel narrow yellow stripes running from the fore border of 
the second segment to the middle of the third; there is besides a 
yellow marginal stripe, which is broader on the sides of the second 
segment : venter black ; male genitalia black. Legsas in G. aurea, 
but the hind femora only w ith the ete eme base narrowly yellow ; 
the knees are also more narrowly yellow ; first jomt of middle 1 tarsi 
of male distinetly, Put léss, lilated : the black hairs are moré 
abundant. Wings with the stigmatic field yellow, black afeasie 
