178 JMiss G. Ricardo on the Asilidse. 



The hairs below the antennre are white, not black as 

 Loew says, and the hairs on the abdomen are chiefly white, 

 not black. 



Promachus dorso, Wlk. 



List Dipt. ii. p. 3U7 [Asilus] (1849) ; et yii., Suppl.3, ip. o99[Trupa7iea'] 



OH55). 

 ?Asilus riibripes, Macq. Hist. Nat. Dipt. i. p. 310 (1834). 



Type (female) from S. Africa (Dr. Smif/i), 41, 6. 



Type (female) in very bad condition, appears to be a species 

 not described l)y any other autlior except Macquart, who 

 described Asilus ruhripes, but states it has three submarginal 

 cells, so that it is probably a Promachus species, and the 

 description such as it is suits this Walker type, which is 

 rather large, 25 mm., with almost wholly red /e(/s ; the 

 femora alone have a dark stripe below, and short white 

 pubescence on the legs. Moustache on the reddish face is 

 composed of reddish bristles with some black ones inter- 

 mixed. Palpi with reddish-yellow hairs and some black 

 ones at the apex. Antennce blackish, but the first two joints 

 chieHy reddish with yellow hairs on underside and black 

 ones on upper side. Forehead with yellow pubescence. 

 Hind part ot head with .short stout rcddish-yollow bristles. 

 Thorax with black bristles and reddish-yellow hairs on 

 posterior border. Scutellum with a double row of reddish 

 bristles and some yellow hairs, also four or five black bristles. 

 Abdomen with the usual spots and short yellow pubescence. 

 Ovipositor short. IVmgs clear, with reddish-yellow veins. 



Macquart gives the size of his species as 22 mm. 



Table o/ Promachus Species from Central and East Africa. 



1. Abdomen with tuft-like hairs, very apparent 



on the basal segments 2. 



Abdomen with no such tufts 3. 



2. Nearly allied to P. famatus, F. Jiristles 



on scutellum chieflj- yellow vanthotrichns, Bezzi. 



3. Legs blacliLsh, only the tibiae yellowish 



('.vternally 4, 



4. Pul>escence on legs and the moustache yel- 



low. Scutellum with black bristles and 



yellow hairs ohsctiripes, sp. u. 



6. Legs reddish or yellow; femora sometimes 



wilh !i black stripe 6. 



6. Antenuffi usually partly red 7. 



Ant<.'nn;r) wlioUy blackish 11. 



7. Genitalia witii tuft of white hairs. Last 



segment of abdomen produced below in the 



male 8. ■* 



