150 Miss G. Ricaido — A Revision of 



which is large and takes up the greater part of face, is 

 shining black in the middle and carries the moustache com- 

 posed of long black bristles. Palpi blackish, with black 

 bristly hairs. Beard whitish. Proboscis at base with long 

 whitish pubescence. Antenna blackish, the first joint two- 

 thirds the length of the third joint, with white hairs and one 

 long reddish-brown bristle at its apex ; the second very short, 

 not half the length of the first, with a long black bristle 

 on each side; the third rather broad and flat, with no style. 

 Forehead and hind part of head with whitish pubescence. 

 Thorax blackish brown, with grey tomentutn on shoulders 

 and continued as stripes median and lateral ; the pubescence 

 on dorsum short, chieHy greyish, sides with longer hairs and 

 with three or more black bristles above the base of wings 

 and three weaker ones beyond ; breast-sides with chiefly 

 long greyish pubescence. Scutellum with grey tomentum 

 and pubescence. 



Abdometi metallic blue-black, the first two segments 

 covered with long grey pubescence, which, however, does not 

 attain the posterior border of second segment ; the other 

 segments bare ; the anus with black hairs ; sides of abdomen 

 with two black bristles on the first segment and one each 

 on the following four segments ; underside with long pubes- 

 cence black, except at the base, where it is greyish. Legs 

 blue-black, with long greyish hairs on the femora and tibiae, 

 the tarsi armed with black bristles and a few bristly hairs ; 

 the posterior femora incrassate, with some stout black 

 bristles on the apical half, the middle femora with two at 

 the apex. Wings clear, veins brown, slightly shaded ; the 

 first posterior cell closed at border (in one male from Queens- 

 land it is almost open at the border and there is an 

 appendix present) ; fourth and fifth posterior cells closed, the 

 small transverse vein situated on the basal third of the discal 

 cell. 



Female is similar, but the pubescence at base of abdomen 

 and on legs is much less, and on the hind femora, which are 

 not so incrassate, it is largely black ; the ovipositor long and 

 pointed. 



Andrenosoma vidua, Bigot, appears to me from the descrip- 

 tion to be identical with this species. 



Maira, Schiner. 

 Verb, zool.-bot. Ges. Wien, xvi. p. 673 (1866). 



This genus comprises blue-black metallic species with 

 swollen hind femora, and all the legs, especially in the males, 



