422 ^lis.s G. Ricardo — A Revision of 



Length 7 lines. 



The description of this reads suspiciously like that of 

 Heliymoneura lascus, Walker ; but this genus is distinguished 

 by the broad third joint of antenncR, almost the same widtli 

 throughout; this last particular is true of H. lascus, but the 

 width is not very great. Scliiner gives uo idea of the 

 proportion of the width to the length. 



5 



Dysmachus, Loew, 7 



Dipt. Siidafrik. p. 143 (1860). 



Lophonotus, Macq., Dipt. Exot. i. (2) (1838), prteocc. Steph. Lepid. 

 1829. 



The genus distinguished by the mane-like bristles on 

 dorsum of thorax, is only represented in the Australasian 

 Kegion as yet by one species from Melbourne, viz. : — 



>/2<f Ken- t(v^^"<» 'Ui^uv 

 I Dysmachus rudisl Walker. 



List Dipt. pt. vii. Suppl. iii. p. 737 {Asilus) (1855). 



Type ( c? ) from Melbourne (Baly Coll.). 



A small dull-coloured species with hyaline wings. Legs 

 black, tibiae reddish. 



Length 12 mm. 



Face blackish, covered with dull yellowish tomentum ; 

 tubercle occupies centre of face, not very large ; the 

 raoustaclie, consisting of strong black bristles, reaches to 

 the antennae ; the oral aperture surrounded at sides by dull 

 yellowish hairs, a few of these are intermixed with the 

 moustache below. Antennce blackish, the first two joints 

 together not so long as the third joint, both with thick 

 black hairs ; the third joint long, cylindrical, with a short 

 style-like arista. Forehead with some long black hairs, 

 longest on the ocelligerous tubercle. Hind part of head 

 with yellowish hairs and black incurved bristles at vertex. 

 Thorax brownish, with stripes of yellowish tomentum, the 

 black hairs long, bristly, disposed like a mane, reaching the 

 whole length of the thorax. Scutellum paler coloured, with 

 two long black bristles. Abdomen brownish, with some 

 yellowish tomentum, black bristles on posterior borders of 

 segments not reaching the centre, dorsum with short black 

 pubescence, sides of basal segments with larger yellowish 

 liairs. Genital organs black, fairly large and prominent. 

 Legs black, the coxae and underside of femora with long 

 yellowish hairs, the tibise dull reddish on basal two-thirds, 

 tirst joint of tarsi same colour ; pubescence yellowish on the 



