OH tf/e Bombtjliifl Fauna of South Africa (Diptera). 143 



EXOPROSOPA (ACRODISCA) PERSONATA, sp. 11OV., $ , $ . 



A small black species allied to angirtata, but distinguished by the 

 more broadly iufuscate wings, which are reticulate and not spotted 

 along the hind border. 



Type <$ , and an additional specimen of the same sex from Bushman- 

 land, Jackal's Water (Cape), October, 1911 (R. M. Lightfoot). 



Type 9, a single specimen from Tulbagh (Cape), November, 1910 

 (R. M. Lightfoot). 



Length of body 7-9 mm. ; of a wing 8-10 mm. ; the 9 is of greater 

 size, measuring 11 and 12 mm. respectively. 



Head as in the preceding species, but the frons and face is entirely 

 black in the male and red in the female, with broad black base and 

 spot ; basal joints of the antennae blackish in the male and red in the 

 female, the third joint black, conical, elongate, obtuse at apex, with a 

 very short and stout style. Thorax entirely black, clothed like the 

 preceding, but with the lateral hairs more white ; scutellum black, 

 with red hind border, broader in the female. Squamae and halteres 

 as in the preceding. Abdomen entirely black or with very small red 

 spots on the sides of 2nd segment in the female ; it is clothed with 

 black scales on the middle and base of the segments, and with yellowish 

 ones on the sides and hind border. On the base of the 2nd segment 

 there is a narrow transverse band of whitish scales and another 

 abbreviated one on the sides of 3rd ; the sides have whitish hairs on 

 the two basal segments, black intermingled with black scales on the 

 remainder. Male genitalia black ; spines of the ovipositor black, thin 

 and straight. Venter entirely black in the male, with broad, red 

 hind borders on the segments in the female, clothed with Avhite scales 

 ami with pale hairs. Legs dark reddish, with black hind tibiae and 

 tarsi ; front coxae with whitish hairs and femora with whitish scales ; 

 front pair very abbreviated, with the tibiae short and stout and with 

 less developed spicules, and with the tarsi very short and thick, shortly 

 pubescent ; middle femora with 2-3, hind femora with 3-4 spines in 

 the male and a complete row in the female ; claws black, with long 

 acute tooth. Wings as in the preceding species, with more developed 

 clear spots in the cells, even in the discal ; the apex is quite hyaline, 

 but all the veins at hind border and the cross-vein of the discoidal cell 

 have bi'oad, partly confluent dark borders, making the Aviiig appear 

 as if reticulate ; anal cell darkened to the end ; praediscoidal spot 

 small, whitish. The basal" hook is black; the comb is small, black, 

 with whitish or yellowish scales ; alula black, with long, blackish fringe 

 extended on the base of the axillary lobe. Venation as in the pre- 

 ceding, but the first posterior cell is usually a little more broadly open. 



