Miss G. Ricardo on the Asilidee. 229 
Female.—Face covered with yellow tomentum. Moustache 
of yellow bristles, a few weak black ones present, the hairs 
continued to base of antenne are yellow. Palpi with 
yellow hairs at base and black ones at apex. Antenne 
imperfect, the first two joints black with black hairs. 
Thoraz is apparently covered with bright yellow tomentum 
and the stripes are black, this is so in the fresh female ; in 
the type the thorax appears greyish with no stripes. Scu- 
tellum in type blackish with grey tomentum, in the fresh 
female covered with bright yellow tomentum ; both females 
with the scutellum covered with black bristles and hairs. 
Abdomen dull black with black pubescence, a few yellowish 
hairs are visible; ovipositor composed of the last four 
segments. Legs red, the knees and the last four tarsi black ; 
pubescence chiefly yellow, black on fore femora; all bristles 
black. Wings large, clear, veins yellowish, the small 
transverse vein below the middle of the discal cell. * 
Promachus contradicens, W\k. 
Proc. Linn. Soe. London, iii. p. 87 [Trupanea] (1859); v. d. Wulp, 
Tijd. v. Entom. xli. p. 133 (1898). 
Promachus interponens, Walker, 1. ¢. vy. p. 280 [ Trupanea] (1861) ; 
Ricardo, Ann. & Mag. Nat. Hist. (8) vi. p. 414 (1918). 
Types. Three co-types all from Aru Islands. Type. of 
T. interponens, only one female from Batjan Island. 
A species distinguished from Promachus complens by the 
wholly black femora and by the smaller genitalia of male. 
Length, g 27, 2 26-33 mm. 
The type P. interponens appears identical with these. 
Genitalia of male are black, shining, the upper forceps 
more slender than those of P. complens, and with their apical 
upper edges rather concave, forming a rudiment of a tooth, 
beyond the club-shaped forceps appear three cylindrical 
reddish-yellow bodies ; on the underside the black projection 
is less triangular, almost square, and elevated somewhat ; 
pubescence on genitalia black. Scutellwm with black bristles 
and white hairs, 
Promachus lineosus, W1k. 
Proc. Linn, Soc. London, i. p. 18 (1856) [_Aszlus]. 
Promachus vittula, vy. d. Wulp, Tijd. v. Ent. xxiii. p. 167 (1880) ; id. 
Sumatra Exped., Dipt. p. 23 (1881). 
Type (female) from Singapore, and another mutilated 
specimen. 
One female from Singapore (H. § N. Ridley), 1904, 214. 
