82 NEW AUSTRALIAN ASILID.E, 



black, with sides yellow ; femora red ; tibipe and tarsi: 

 black; wings brownish. 



Length. Male, 11 mm. 



Hab. Sydney, N.S.W. 



Male. Face dark golden ; moustache consisting of 

 about nine long, bristle-like, black hairs, which project 

 horizontally ; beard white. Palpi prominent, black, witli 

 abundant white hairs. Antennae black, the fii'st and 

 second joints of equal length, and bearing stiff black hairs, 

 the third one-and-a-half times the length of the first two 

 together. Front grey, with a biinch of black hairs on 

 either side of the middle; ocellar tubercle black, with 

 long bristle-like hairs. Thorax black, with golden shoul- 

 der-spots, and with shoulder tubercles, lateral and pos- 

 terior margins yellow ; thoracic bristles black ; scutellum 

 pale golden, with two long, black, converging, marginal 

 bristles. Abdomen black, punctate, with sides yellow, 

 practicall)'^ bare, but with a tuft of white hairs on each 

 side of the first segment ; genitalia swollen, with white 

 pubescence. Legs with femora red, bare, the posterior 

 pair with a short stripe, and apex black ; anterior tibi<e 

 red, middle tibiae red with apex broadly black, posterior 

 femora, wholly black ; all tibiae bear long white bristles, 

 which are much the most numerous on the posterior pair ; 

 the anterior a,nd middle tibiae also bear short black bristles; 

 tarsi black, with black bristles, the first joint of anterior 

 and middle tarsi red at base. Wings brownish ; the first 

 posterior cell wide open, the fourth also open, but nar- 

 rowed on the wing margin to less than half its breadth; 

 anal cell very narrowly open. Halteres yellow. 



This species is very distinct from the only other known 

 Australian species, M. ausfrt/Iis, Ricardo. The abdomen 

 is black, with sides yellow, instead of black with apex 

 red, the moustache black, instead of yellowish-white, the 

 antennas black, instead of reddish-yellow, and the posterior 

 tibiae black with white bristles, instead of red with black 

 bristles ; it is also larger in size. 



M. auri fades is at present only known from a, single 

 specimen, taken bv Dr. Ferguson at Roseville, Sydney, on 

 December 26, 1914. 



A T o M o s I A, Macq. 



This genus comprises small species, which have the 

 cross-veins closing the discal and fourth posterior cells 

 parallel; the anterior tibiae are without an apical curved 

 spine, and all the tibiae and tarsi bear remarkably long 



