NOTES ON THE ETHIOPIAN FRUIT-FLIES — II. 19 



12(5). Wings with 4 hyaline indentations at the hind border, the 4th being extended 

 across the last portion of the 3rd longitudinal vein into the submarginal 

 cell . . . . . . . . . . . . • . capensis, Roud. 



13(4). There are 3 hyaline rounded spots, 2 being in the discoidal cell ; the 4 

 hyaline indentations at the hind border are short and broad, and disposed 

 in 2 pairs . . . . . . . . . . . . ternaria, Loew. 



14(1). All the occipital bristles are black ; only 2 scutellar bristles ; wings broadly 

 hyaline at the hind border, with a single middle fuscous stripe reaching 

 the hind border .'. '. . .. .. . . .. binaria, Loew. 



1. Aciura angusta, Loew, Berl. Ent. Zeits., v, 1861, p. 271, pi. ii, fig. 9. 



A narrow elongate species, very distinct from any other on account of its 

 rudimentary axillary cell, the wings being therefore almost pedunculate at base. 



All the bristles around the occipital border are whitish, only the longer vt. being 

 black ; the pvt. are rather thick and rather obtuse, while those of the occipital row 

 are thin and acute. These characters are also present in the following 4 species : 

 oborinia, semiangusta, caeca and tetrachaeta, and in the Indian xanthothrica, which 

 thus form a natural group, having a very constant wing pattern, like that of the 

 two European species (coryli and rotundiventris), and a narrow elongate body, 

 with the ovipositor narrow and about as long as the abdomen. The peculiar shape 

 of the hind cross-vein is also characteristic for the group. 



To Loew's description may be added : — One mpl. ; thoracic bristles sometimes 

 in part of a dark yellowish colour ; st. stouter than the short and weak pt. 



Originally described from Caffraria, and recorded by Becker from Sokotra, there 

 are in the collection some specimens of both sexes from Umbilo, Durban, 3.v.-l.vi. 

 1914 {L. Bevis). 



2. Aciura oborinia, Walker (1849). 



Distinct from the other species on account of the hyaline dot in the centre of the 

 broad apical black patch of the wings, recalling that to be observed in A. coryli. 

 Originally described from the Congo, but never found subsequently. 



3. Aciura semiangusta, sp. nov. (PI. i, fig. 3). 



Very like the two following species, from which it is distinguished by the hyaline 

 streaks of the discoidal cell. 



9. Length of the body, 4 mm. ; of the ovipositor, 1"5 mm. ; of the wing 4 '5 mm. 

 Occiput hollowed above, entirely black, with dark grey dust ; all the bristles at its 

 border are whitish, the upper ones rather thick but acute at end, the other rather 

 thin ; inner vt. black, like the frontal bristles. Frons flat, not prominent in profile, 

 dark reddish brown, with the sides white-dusted in front ; it is distinctly longer than 

 broad, and bears 3 pairs of strong lower or. ; there is a triangular, black, rather 

 shining ocellar plate, with very short oc. ; lunula normal. Eyes higher than broad, 

 but not much narrowed ; cheeks linear ; jowls very narrow ; genal bristle strong, 

 black. Antennae inserted at middle of the eyes, a little shorter than the face, 

 entirely dark reddish, with the 3rd joint about twice as long as the 2nd ; arista 

 microscopically pubescent. Palpi and proboscis dark yellowish. Thorax entirely 



(C455) b2 



