﻿(Ill lin- lioiiihi/liiil ViiKiui iif South Africa {D'l jiti'ra). 5 



46 (3). Protliorax iiiucli developed and )H'set with stron<4- l)ristles (Toxn- 



jihorinae) ...... Toxophora, Meij;^. 



47 (2). Occiput proiuiiu'ut, bilobato above, with a central <ravity, and with 



the fring-e placed at the liorder of this cavity {CijUenliiiae). 

 4S (03). Ocelli well developed ; nietapleurae Imve. 

 4!» (Ô2). Second long-itudinal vein not recurrent; first posterior cell open; 



three submarginal cells present. 



50 (51). A marginal cell only .... Nomalonia, Eond. 



51 (50). Three marginal cells .... Henica, Macq. 



52 (49). Second longitudinal vein recurrent; first posterior cell closed; two 



submarginal cells ..... Péfingueyimyia, Big. 



53 (48) Ocelli not distinct ; metapleurae hairy . • I'omomyra, Wied. 



54 (1) Hind I )order of the eyes indented ; eyes with a more or less distinct 



liisecting line ; occiput always prominent and bilobate above. 



55 (00). Origin of the second longitvidinal vein lieginning before the middle 



cross-vein, and usually at acute angles with it (Loniatiiiwe). 

 5() (59). Origin of the second longitudinal vein acute and distant from tlie 

 middle cross-vein. 



57 (58). Middle cross-vein placed much l>eyond the middle of the discoidal 



cell ; eyes of the male separate ; two submarginal cells. 



Loiiui-tia, Meig. 



58 (57). Middle cross- vein a little before the middle of the discoidal cell; 



eyes of male united ; three submarginal cells . Pteraulax, gen. nov. 



59 (5(5). Second longitudinal vein originating at an obtuse angle and rather 



near to the middle cross-vein . . . Pefrorossiw, Bezzi. 



60 (55). Origin of the second longitudinal vein qnite opposite to the middle 



cross-vein, or nearly so (but a little before it in the gen. Sijnthesia). 



61 (64). Third antennal joint with a pencil of hairs at end; squamulae with 



hairy fringe; metapleurae bare {Anthracinae). 



62 (63). Third antennal joint broader than the second, and a\ ith a produced 



margin ; wings with a broad black pattern, and often dimidiate. 



Anthrax, Scop. 



63 (62). Third antennal joint globular, inserted into the cup-shaped second 



joint and not )n-oader ; wings only -with infuscated spots at cross- 

 veins and bifurcations .... Spongostylum, Macq. 



64 (61). Third antennal joint without terminal pencil of hairs; sqiiamulae 



with scaly fringe ; metapleurae hairy (Exoprosoplnae). 



65 (72). Two submarginal cells only, or very rarely throe; ocelli placed at 



vertex or nearly so ; claws iisually not toothed. 



66 (71). Front tibiae beset with distinct spicules; proboscis short, retracted, 



with fleshy terminal flaps ; third posterior cell long. 



67 (70). Face rounded, not prominent, never very convex ; second longitudinal 



vein originating quite opposite to the middle cross-vein : third anten- 

 nal joint globular, quickly attenixated into a long, thin filiform style. 



68 (()9). Mouth-opening developed as visual, like the proboscis; facial plate 



short ; thoracical macrochaetae well developed . Villa, Lioy. 



69 (68). Mouth-opening vevy small, with the proboscis rudimentary; facial 



plate very long and broad ; no thoracical macrochaetae. 



Oestrtinthra.v, Bezzi. 



