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 13'5 mm. ; hind leg, femur 13 mm., tibia 13'8 mm. 



Rostrum and palpi black. Antennae moderately elongated, the 

 first five 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. Prouotum 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 subtermiual black anuulus, 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 Bs, 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), Sc 

 at the tip of $c x ; r at the tip of R } ; deflection of -B 4 + 5 longer than 

 r or r-m ; basal deflection of Cit^ longer than Cu 2 , situated at the fork 

 of M. 



Abdomen with the first tergite brownish, the remainder greenish- 

 yellow, each segment margined caudally with yellowish, these margins 

 broader toward the tip of the abdomen. 



