On the Bombyliid Fatnia of South Africa (Dipt era). 107 



broad. Face short, bare ; geuae with a very deep furrow, as in 

 Cyllenia ; occiput less developed than in this genus, but likewise 

 furrowed above. Antennae inserted at the level of the centre of eyes, 

 approximate at base ; first joint globular, bare, as long as the second ; 

 third joint very elongated and bare at end. Proboscis twice as long 

 as the head ; palpi well developed. Thorax and. scutellum with 

 bristles on the sides and at the hind border ; metapleurae bare, 

 squamae rudimentary. Abdomen bi'oad, destitute of long bristles ; 

 male genitalia much developed and prominent. Legs with spinose 

 femora and spiuose tibiae ; pulvilli rudimentary, while in Cyllenia 

 they are well developed. Wings with rudimentary alula ; first longi- 

 tudinal vein scaled at the base like the costa ; second vein curved at 

 end, but not recurrent ; a single marginal and 3 submarginal cells ; 

 discal cross-vein placed on the last fourth of the discoidal cell ; 4 

 posterior cells all open, but the first being at the end and half as. 

 broad as the second ; discoidal cell obtuse outwardly, its terminal vein 

 being straight and a little longer than the distal cross-vein ; anal cell 

 open, but narrowed at the end; ambient vein entire. The second 

 longitudinal vein springs from the third at a right angle and has 

 often the stump of a vein ; the praefurca is very long. 



NOMALONIA AFBA, Macquart (1840). 



A robust species of proportionally great size, easily recognisable 

 by the fenestrate wings with a single marginal cell. 



Macquart has described the male from the Cape, believing wrongly 

 that he had before him Henica longirostris = Cyllenia afra, Wied, 

 There is in the collection a pair from Namaqualaud, Springbok 

 (Cape) November, 1890 (E. M. Lightfoot). To Macquart's description 

 must be added : Length of body 11-13 mm. ; of a wing 11-12 mm. ; 

 of the wing spread 26-30 mm. Occiput red, with a broad yellow 

 border near the eyes, which becomes broader below ; this border is. 

 marginated with a black stripe on the upper end, and more bi-oadly 

 in the female ; it is closed with dense but short white hairs, the eyes' 

 border, however, being bare ; it is deeply excavated above in the 

 middle, forming a deep furrow, from which springs the ocellar tubercle. 

 Ocellar tubercle ovate, greatly developed and very prominent, black on 

 the fore-half and reddish behind, black-haired in front. Eyes purplish- 

 black, proportionately small, with equal areolets in both sexes. In the 

 male the frous at the narrowest point is about as broad as the distance 

 between the 2 basal ocelli ; in the female it is about i of the head- 

 breadth ; the frons becomes afterwards very broad, being equally 



