70 AUSTRALIAN BOMBYLIID^ AND CYRTJD^ (DIPTERA), 



Systoechus jmusarius, Jjennicke, Abhand. der Senck nat. G., 



vi., 1867, p. 348. 

 Systoechus callyvthrophoriis, Schiner, Reise Novara, 1868, 



p. 137. 

 Bomhylius spinipes, Thomson, Eug. Resa, Dipt., 1868, 



p. 488. 

 Synonymy. — The above synonymy appears to be cor- 

 rect. The species is very common and very variable in size. 

 In Dr. Ferguson's collection a female is labelled by White as 

 S. vetustus, Walker, and a second female with fuscous spots 

 traceable on the wings and with the front slightly wider is 

 named S. pencUlatus, Macquart. Macquart's description 

 •does not appear to agree with White's determination, as 

 these characters are not mentioned; the length of the pro- 

 boscis is too variable to be used for identification purposes, 

 and therefore it seems advisable to consider Macquart's two 

 names as belonging to probable variations of the same 

 species. 



Systopchns distinctus. Walker. 



Bombylius distinctus, Walker, Ins. Saund. Dipt., 1850, p. 201. 

 Note. — Three males and one female from Sydney, in the 

 Macleay Museum, probably belong here; the female has an 

 exceptionally wide head, and both sexes are uniformly light 

 brown in colour. 



Systaschus alhiceps, Macquart. 



Bombylius alhiceps, Macquart, Dipt. Exot., suppl. 3, 1848, 

 p. 36. 



Systcechus bifrons, Walker. 



Choristus bifrons, Walker, Ins. Saund. Dipt., 1850, p. 198, 

 PI. v., fig. 5. 



Systoechus leucopygus, v. d, Wulp. 



Systoechus leucopygus, v. d. Wulp, Notes Leyden Mus., vii., 

 1883, p. 86. 



Genus Sisyromyia, White. 

 Sisyromyia, White, Proc. Roy. Soc. Tasm., 1916, p. 197. 



Note. — Under this genus seventeen descriptions are 

 placed. Two of these White placed to synonymy, and five 

 further synonyms are suggested here. Three species are 

 definitely recognised in the collections under revision as be- 

 longing to described species, a fourth species is temporarily 

 retained under a fourth name, and six descriptions by 

 Walker have not been recognised. 



