176 Miss G. Ricardo on the Asilide. 
these specimens appear to be identical with his species, 
auswering in every detail to his description, with the 
exception of size, Loew giving the length as 20-204 mm.— 
these measure from 24-25 mm. 
It is a robust species distinguished by the wholly black 
legs with white pubescence and hairs and some white bristles. 
Scutellum with yellowish or whitish hairs and bristly hairs. 
Palpi white-haired. The genitalia at once distinguish the 
male, the upper forceps being large and curved to meet each 
other at their apices, leaving a space between, in which 
appears the middle organ, a slender piece with a large short 
spine near its base below; the forceps are bifid, the lower 
tooth being sharp and spine-like, the upper one large and 
obtuse. 
Promachus amastrus, W\k. 
List Dipt. ii. p. 394 [Aszlus] (1849) ; et vii., Suppl. 3, p. 599 [ Trupanea] 
(1855). 
Promachus scilurus, Wik. List Dipt. ii. p. 895 [-Aszlus] (1849). 
? Promachas edithus, Wik. List Dipt. ii. p. 429 [Asilus] (1849). 
Promachus capreolus, Loew, Ofvers. Kongl. Vet.-Akad, Forhandl. xiv. 
1857, p. 860 (1858); et Dipt. Siidafrik. i. p. 333 (1860). 
Promachus bicolor, Ricardo, Ann. & Mag. Nat. Hist. (7) vi. p.178(1900). 
Promachus solus, Adams, Kansas Univ. Sci. Bull. iii, p. 153 (1905). 
Types (male and male) from 8. Africa (Dr. Smith). 
Type (female) of P. scilurus from 8. Africa. 
Types (male and female) of P. edithus from S. Africa 
(Dr. Smith). 
Type (female) of P. bicolor from Pretoria. 
Males and females from junction Blaaw Krantz and 
Tugela Rivers, Natal, Oct. 1896 (G. A. K. Marshall). 
Two females in the Durban Coll. from Salisbury. 
Males and females from Natal, Cape Colony, and Orange 
Free State in Cape Museum Coll. 
The type of P. scilurus is in very bad condition, but 
appears identical with P. amastrus, as does P. edithus, but 
owing to their condition it is impossible to be certain. 
The specimen I named P. bicolor appears the same, 
evidently the wholly red legs with no black stripes being an 
exception to the general rule. 
Adams’s species, P. solus, described from one female, 
‘measures 15 mm., and appears from the description to be 
identical with Walker’s type. 
A species larger than P. venerabilis, W1k., the second joint 
of antenne is not yellow. Genitalia almost identical. 
Occiput with usually shért yellow bristles, but sometimes 
