I'.Y C. ir. HARDY. 



83 



Observations. — Of Walker's nine spec-ies placed by me 

 under the genus Sisyromjia, four are placed by White under 

 Dischistus. 



Dischistiis antecedeus, W&lker. 



Bombijlins antecedeus. Walker, List Dipt. B.M., ii., 1849, 



p. 293. 

 Sisyyoviifia avtecedcns, Hardy, Proc. Roy. Soc. Tasm., 1921, 



p. 72. 



Disclii:<tus alttis, Walker. 



Bombyliiis altiis, Walker, List Dipt. B.M., ii., 1849, p. 2H8. 

 Sisyromyia altns, Hardy, Proc. Roy. Soc. Tasm., 1921, p. 72, 

 Bombylbis pingnis, Walker, List Dipt. B.M., ii., 1849, p. 29(), 

 Sisyromyia pivfjuis, Hardy, ibidem, 192f, p. 72. 



Note. — The species labelled by me Sisyromyia piugnia in 

 the Macleay Museum cannot be identical with Walker's 

 .«:pecies, if the information gathered from White's manuscript 

 is correct. 



Dischistus imrnKtatus, Walker. 



Bombyliiis im))ii(taiii.s, Walker, List Dipt. B.M., ii., 1849, 



p. 292. . 

 Sisyromyia immutatus, Hardy, Proc. Roy. Soc. Tasm., 1921, 



p. 72. 



Genus Systoechus, Loew. 

 White's mannscript. — "First posterior cell closed; lirst 

 and second basal cells of almost equal length. 



Table of Australian Species of Systoechus. 



1. Apex of abdomen with a tuft of dark brown pubes- 



cence on each side; abdomen with a brown 

 band across the middle. 2. 



Apex cf abdomen without side tuft.s of pubescence; 



abdomen not banded. 3. 



2. Pubescence of abdomen pale brown. 



crassus, 'Wa\k. = i)lnt!iin its, Walk. 

 Pubescence of abdomen white. 



I'lctustns, Wii\k. = ^srricavs, Macq. 



3. Pubescence of abdomen golden. di.^tiuctus, Walk." 



Observations. — It is possible that Choristus will have to 

 take the place of Systa'chus, but as the type species is not 

 known to me, I refrain from changing the nanies for the pre- 

 sent. White seems to have overlooked Choristus bifron.t, 

 Walker, as his manuscript is without refei-ence to it. 



