38 AUSTRALIAN STRATIOMYIID^I, 



Key to the Species of Xenomorpha. 



1. A non-metallic species with the- antennae short, the 



third joint short. australis. 



A species with a metallic thorax and the antennae with 



the two basal joints minute, the third joint long, in 



proportion, and swollen. grandicornis, sp. not*. 



Xenomorpha australis, Macquart. 



Text fig. 2. 



Xenomorpha australis, Macquart, Dipt. Exot., suppl. 4, 



1850, p. 54, pi. iii., fig. 7. Id., Williston, Trans. 



Ent. Soc. Phil., xv., 1888, p. 244. 

 Metoponia australis, White, P.L.S. N.S.W., xli., 1916, p. 



75. 

 ? Chiromu'za vicina, Bigot, Ann. Soc. Ent. France (5), ix., 



1879, p. 200. 

 .' Metoponia vicina, Kertesz, Cat. Dipt, iii., 1908, p. 145. 

 Synonymy. — Macquart's X. australis, described from 

 the East Coast of Australia, and Bigot's C. vicina, queried 

 from Australia, may belong to the same species. Until 

 the types are examined it will be impossible to determine 

 if this is the case, and indeed Bigot's species may belong to 

 quite a different genus. 



The species described below is probably correctly 

 identified and is the only form obtained in numbers and 

 in sufficiently good condition to warrant a description. 

 There seem to be a number of specimens belonging to this 

 genuis, but most of them are represented by specimen's 

 which are inferior in condition, and may ultimately prove 

 not to be distinct. 



Description. — Male. Although black, a coveiing of 

 yellowish depressed pubescence gives this insect the appear- 

 ance of being greyish. The eyes have scanty yellowish 

 pubescence ; the front is linear and widens above the an- 

 tenna; and at the ocelli into triangular areas ; the pubes- 

 cence on the ocellar triangle is black and on the antennal 

 triangle yellow; the antennae arc yellow, stained more or 

 less with black on the two basal joints, and the third joint 

 is as long as the two basal joints together; the proboscis- 

 is yellow ; the face is very receding and has sparse whitish 

 pubescence at the sides, and is covered with light grey 

 tomentum which extends on to the frontal triangle. The 

 thorax abo<ve has two faint reddish brown stripes which 

 widen anteriorly, merge into two large shoulder spots and 

 converge toward si the scutellum, near which they disappear, 

 the pubescence of the dorsum is yellowish and that of the 



