Additions to the Bombi/Uid Fauna of South Africa (Diptera). 477 



pilose ; claws Avith long and acute basal tooth. Wings whitish 

 hyaline ; the fuscous pattern is faintly developed, but ends distinctly 

 in a truncate form into the marginal cell opposite to the marginal 

 cross-vein ; the basal and the discoidal cell are less infuscated, and 

 therefore there is a fuscous patch at the end of the discoidal cell 

 which seems sometimes to be isolated as in the species of the E. heros- 

 group. First posterior cell narrowed at end, being only a little 

 broader than the anal cell at end ; the terminal cross-vein of the 

 discoidal cell is horizontal and somewhat S-shaped ; moreover, the 

 discoidal cell has a projection into the third posterior cell of a rather 

 angular shape and appendiculate as in the subgenus Acrodisca, from 

 which the present species is distinguished in having elongate and not 

 spiculose front tibiae. 



EXOPROSOPA (EXOPROSOPA) ATRINASIS, Speis (1910). 



A species of proportionately greater size, very distinct on account of 

 its large wings, which are infuscated along the fore border, and have 

 the cross-vein edged with fuscous, but not in the shape of rounded 

 spots as in the &fl?io/^era-group. In the key of the species (' Ann. S. 

 Afr. Mus.,' xviii, p. 151) the present species should follow No. 39, 

 being distinct from luteicosta owing to the more developed wing- 

 pattern. 



1 $ f rom Peinba, N. Rhodesia (Father Cassett), and another female 

 from Otjiverongo, S.W. Protectorate, February, 1921 (Iv. H. Barnard). 



The species is known from East Africa and Abyssinia, but was also 

 found in Nyassaland ; it is pre-eminently a centre-oriental form. 



ADDITIONS AND CORRECTIONS TO MONOGRAPH OF SOUTH AFRICAN 

 BOMBYLIID.E (VoL. XVIII, PT. I, pp. 1180). 



P. 4, 1. 37, and p. 178, 1. 3-1; read Pseudoamictus instead of Pseudossmictus and 

 Pseudomictus. 



P. 5, 1. 12, and p. 179, 1. 6, read Tomomyza instead of Tomomyra. 



P. 9, after Bombylius bombi/ormis add spec. nov. 



P. 52, after Anastoechus macrophthalmus add spec. nov. 



P. 69, 1. 19, and p. 176, 1. 17, read comata instead of carnata. 



P. 78, after Corsomyza anceps add spec. nov. 



P. 88, after Gonarthrus add gen. nov. 



P. 99, after Geron barbatus add spec. nov. 



P. 105, after Toxophora punctipennis add spec. nov. 



P. 1.30, after Oestranthrax delete (1912) and add gen. uov. 



P. 134, after Tliyridanthrax transiens add spec. nov. 



P. 136, after Thyridanthrax ternarius add spec. nov. 



P. 139, after Hetapenta add sub. gen. nov. 



31 



