4G SYRPHIDJE. 



Type , a single specimen from Durban, Mitchell Park, 22. i. 1903 

 (F.'Muir). 



It is quite possible that B. Jielva is the female of the very 

 dark-coloured B. neavei, described below. 



39. Baccha neavei, sp. n. 



c? . Length of body 11 to 12 mm., of wing 9 to 10 mm. 



A species evidently belonging to the picta-growp, but distin- 

 guished from any other on account of the wholly black coloration 

 of thorax and scutellum ; in all probability, however, the unknown 

 female will be found to be paler-coloured than the male. 



Head black ; face yellowish red, the middle tubercle more yellow, 

 the sides with bluish reflexions arid sparse tomentum, and also 

 with some dark hairs ; peristoma narrow, blackened behind ; frontal 

 triangle shining blackish aeneous, dark-haired ; the not very pro- 

 minent antennal tubercle is yellow towards the lumile and somewhat 

 violet-coloured on the sides ; vertical triangle very narrow, aeneous 

 black, black-haired ; occiput black, whitish-dusted, with a complete 

 white fringe, darkened above ; lateral margin of the eyes white ; 

 antennae dark orange-coloured, the basal segments blackened, with 

 bluntly ovate third joint and brown arista, which is, however, yellow 

 at the base and sometimes shortly pubescent. Line of contact of 

 eyes as long as the vertical triangle ; eyes apparently adorned with 

 a single median dark band. Thorax and scutellum entirely metallic 

 shining aeneous, with short pale hairs ; humeri very narrowly 

 reddish ; pleurae like the back, darkened above, clothed with 

 slightly longer hairs. Squamulae yellow, with a short fringe ; 

 halteres whitish. Abdomen very narrow, cylindrical, only slightly 

 spatulate, wholly shining black ; third and fourth segments with 

 an oblique yellowish spot towards the middle of the sides, some- 

 times fused to form a complete band ; hair on the stalk very 

 long and erect, otherwise short and dark. Genitalia black, grcv- 

 dusted and grey-haired. Front legs with the coxae entirely pale 

 yellow ; middle legs with the femora blackened behind towards the 

 base ; hind legs with the femora black, yellow at the apex, and 

 the tibiae yellowish with a more or less distinct subapical black 

 ring. Wings less broad than in pi eta, with black veins, the third 

 and the seventh sinuous, the anal cell therefore irregularly shaped 

 as in picta ; wings blackish brown, but with hyaline alula, axillary 

 cell, and hind border ; there is a narrow hyaline streak in the 

 middle extending from the bifurcation of the second and third 

 veins to the third posterior cell; subcostal cell black; a broad 

 hyaline preapical band and a broad apical brown spot extending 

 from the end of the lirst to the third vein, and often even passing 

 it more or less. 



Type tS and two additional specimens from Lamoru Station, 

 Uganda Ely., British East Africa, 9-10. iii. 1911, 7,340 ft., col- 

 lected by Mr. S. A. Neave, in whose honour the species is named. 

 There is also a male specimen from Durban, G. vi. 1903 (F. Mitir). 



