144 Annals of the South African Museum. 
dorsal stripe ; femora with a narrow subterminal black ring ; wings 
light yellowish to hyaline with abundant black, brown and grey dots, 
spots and clouds on the wing-membrane. 
Male. — Length 12"5 mm. ; wing 20 mm. 
Female. — Length 12*2 mm. ; wing 15'5 mm. ; fore leg, femur 
11"3 mm., tibia 135 mm. ; hind leg, femur 13 mm., tibia 138 mm. 
Rostrum and palpi black. Antennae moderately elongated, the 
first live segments black, beyond the fifth passing into light brown 
or brownish-yellow, the terminal segment elongated, black with a grey 
bloom. Front narrow, buff ; remainder of the head buff' with a 
slight greenish tinge ; a narrow black mark on the vertex. 
Thorax gibbous. Pronotum elongated, yellow, with a green cast. 
Mesouotal praescutum light yellow with a strong greenish cast on 
the sides ; a well-defined black stripe on each side of the very narrow 
yellow median vitta, these stripes narrowed anteriorly, considerably 
broadened at the transverse suture ; lateral stripes short, barely 
indicated, greenish ; a quadrate area devoid of pollen just back of 
the pseudosutural foveae ; scutum with the lobes largely black, 
median area and the remainder of the lobes yellowish ; scutellum 
black with a narrow median yellowish line ; postnotum brownish- 
black, yellow on the sides. Pleura yellow with a strong green cast ; 
two broad, interrupted brown stripes, the dorsal one beginning above 
the fore coxae, becoming indistinct beneath the wings ; the ventral 
stripe is on the mesosternum, reappearing as a rounded spot just in 
front of the halteres. Halteres green, the knobs yellowish. Legs 
with the coxae and trochanters green ; femora light brown, more 
yellowish apically ; a narrow subterminal black aunulus, subequal to 
or slightly less in extent than the yellow apex ; tibiae light brown, the 
extreme tip narrowly darker brown ; metatarsi similar, the remaining 
tarsal segments black. Wings light yellowish on the costal area, 
more hyaline elsewhere ; veins light yellow, dark brown where traversed 
by dark markings ; dark markings as follows : A series of small black 
dots in the costal and subcostal cells ; dark brown areas at the base of 
M, base of Rs, tip of Sc^, along the cord and along vein Cu ; numerous 
grey clouds and spots in all the cells of the wing, the anterior cells 
being more free of these markings. Venation (Plate X, fig. 6), 8co, 
at the tip of Sc^ ; r at the tip of B^ ; deflection of -R^+s longer than 
r or r-m ; basal deflection of Cu^ longer than Cuc,, situated at the fork 
oiM. 
Abdomen with the first tergite brownish, the remainder greenish- 
yellow, each segment margined caudally with yellowish, these inargins 
broader toward the tip of the abdomen. 
