38 SYHPIHILE. 



I have redescribed this species in the above-quoted paper on Feu's 

 Syrphids ; Bigot's description, which was previously included among 

 the synonyms of cegyptium, corresponds very well with these speci- 

 mens, chiefly because Bigot calls the third antennal joint "rounded." 

 Perhaps it is only an extreme form of rotundicorne, Loew (1858), 

 of which there are no specimens in the collection, but which is 

 common in South Africa, dentatum, Walker (1852), being probably 

 the same species, which is represented in the Oriental Region by 

 the nearly allied javannm, Wiedemann (1824). 



Several specimens of both sexes : Karonga, Nyasaland, v. 1910 

 (Dr. M. Sanderson} ; Zungeru, N. Nigeria, xi. 1910 (Dr. J. W. 

 8. Macfie and J. J. Simpson} ; Koba District, Nile Province, 

 Uganda, vi. 1909 ; Lilongwe, Nyasaland, 8. i. 1911 (Dr. J. E. 8. 

 Old} ; Angola, 1908 (C. Well-man} ; Mauritius, 1911 (N. . Rock}. 



This species also seems to be widely spread throughout the 

 Region. 



33. Xanthogramma calopus, Loew (1858). 



Very distinct from any other species, on account of its eight 

 very broad and rounded yellow abdominal spots, w r hich recall those 

 of Syrplms bratteri. 



A single female specimen from Pinetown, Natal, 20. iv. 1902 

 (F. Muir). 



Genus 8. BACCHA, Fair ictus (1805). 



Of this rich genus, only the following species have been recorded 

 or described from the Ethiopian Region : (1) pi \cta ; Wied. (1830), 

 (2) vittata, Wied. (1830), (3) sappJiirina, Wied. (1830), (4) 

 claripennis, Loew (1858), (5) favicoruis, Loew (1863), (6) 

 punctum, Bigot (1885), (7) Irevis, Karsch (1887), and (8) enry- 

 ptera, Bezzi (1908). Of these the second is the same as the first, 

 and the fifth and sixth are the same as the third ; the seventh is 

 perhaps the same as the fourth. There are thus only four good 

 Ethiopian species, compared with thirty from the Oriental Region. 

 It is therefore not surprising that the present collection contains 

 numerous new species, some of which are very interesting and 

 beautiful. 



They can be tabulated as follows : 



1 (2) Wings very narrow and cuneiform at the 

 base, without alula and without promi- 

 nent axillary lobe ; froiis produced before 

 the vertex into a conical protuberance, 

 which bears the ocelli ; abdomen very 

 long and narrow, much longer than the 

 wings ; face yellowish below on the sides, conifrons, sp. n. 



H (1) Wings not narrowed and often very dilated, 

 always with well-developed alula and 

 axillary lobe ; frons without protuber- 

 ance or with a very slight one j abdomen 



