NEW AUSTRALIAN SA W FLIES. 
213 
recurrent vein (indicating that the positions of these veins are more liable to 
variation than was at first thought) and in which the black pigment is less 
widespread, so that the front and sides of mesonotum together with the 
scutellum and the metanotum are yellow, while the dark mark on the 
mesopleura is much smaller. Queensland, National Park, 1 §, xi-1920, H. Hacker 
(Queensland Museum). 
This species is separated from all others in the genus by the black head 
in both sexes, the very pale legs, and the carina on the face reaching right to 
the front of the supraclypeal area ; the sawsheath is most like that of A . 
apicale W. F. Kirby, but the dorsal tooth is not so sharp when viewed from 
the side. 
ANTARGIDIUM RUFUM sp. nov. 
$ Colour. — Reddish yellow all over, except the tibiae and tarsal segments 
which are infuscated. Wings, infuscated throughout ; stigma and venation 
black. Length 6-3 mm. ; forewing 6-3 mm. ; antenna 25 mm. Puncturation 
obsolete. Head : malar space about half as long as pedicel of antenna ; pedicel 
about two-thirds as long as broad ; supraclypeal area with the .medial carina 
present on the hind two-thirds of the area, but not sharp, the front one-third 
is simply rounded; frons as in A. atriceps sp. nov. Legs with the hind 
basitarsus distinctly longer than the three following tarsal segments together. 
Wings : recurrent vein in the hindwing nearer to the base of the wing than 
the transverse-cubital vein, as in A. allucente Benson (Benson 1934 (1), fig. 1). 
Abdomen: hind margin of hypopygium entire; sawsheath as in A. dentivalvis 
Benson, but set up almost erect ; saw fig. 2. 
New South Wales, Tooloom, 2$$, i-1920, H. Hacker (holotype in 
Queensland Museum ; paratype in the British Museum). 
This species is distinguished from all others by the head and body being 
entirely reddish -yellow, and by the very short almost linear malar space. The 
sawsheath comes nearest to that of A. dentivalvis Benson, but it is set up 
almost erect, whereas in that species the sawsheath is not so set. 
ANTARGIDIUM ? DENTIVALVIS Benson. 
One female, Queensland, Townsville, Dr. H. Priestly, in bad condition, 
probably belongs to this species. It differs from the type in being larger 
(4-5 mm. instead of 4 mm.), in the sawsheath being set up erect at the apex 
and in the transverse-cubital vein in the hind-wing not being interstitial with 
the recurrent vein, but received on the cubital nearer the apex of the wing as 
in A. allucente Benson and typical Arge. 
