g4 .\OTi:S ON AISTKAMAN T.OM I". VI.I IP.T.. 



Sifstvechiis australis, Guerin. 

 Domhylms anstralis, Guerin, Voy. Coq. (2) ii., 1830, p. 2it4; 

 pi. XX., fig. 4. Id., Hardy. Proc. Roy. Soc. Tasm.. 

 1921. p. 75. 

 Note. — According to the descripticMi and illustration, 

 this species could be either a Bombi/liKs or Siisf(vchns. Four 

 specimens of the latter genus, from Sydney, agree with the 

 curvature of the radial vein, and with the very long palpi, 

 both of which characters in the illustration ai-e unknown to 

 nie within the genus Douihifliiis. Other characters given in 

 the illustration are not reliable, and are due to inferior 

 drawing; even the colour is unsatisfactory, as the copy of the 

 work in the Australian Museum shows the insect to he uni- 

 form, and dark in colour, whilst that in the library of the 

 Linnean S(;ciety shows a brighter insect, with light stripes 

 at the sides of the thorax. 



I propose to utilise the name for four specimens (:> J t? • 1 V ) 

 which are in my collection, and were taken in the vi- inity 

 of Sydney. These specimens differ from the illustrations 

 in colour, but agree with the description and the illustration 

 moderately well, allowing for the inferior drawing, and they 

 are the only specimens known to me in this ^^x allied genera 

 that have the very long palpi. 



Genus Sisyromyia, White. 

 White's mfDiiiscript. — "F'irst posterior cell open; first 

 and second basal cells of almost equal length. 



Table of Anfttraliau Species of Sisuronmid. 



1. .\pex of abdomen with a tuft of black pubescence 



on each side. 2. 



Apex of abdomen without side tufts of black pubes- 

 cence. «^- 



2. Yellow haired species. tetidtriclnis. Walker. 

 .*$. Abdomen with a yellow or white centre stripe. 4. 



Abdomen without a centre stripe. 7. 



4. Centre stripe bright yellow. 



(Ill I (it us. Walk. — cni ss lios t ris , M acf |. 

 Centre stripe while. 5. 



r>. Wings with the costal half brown, remainiler hyaline; 

 legs altogether red; abdominal pubescence dark 

 tawny. deeordtiis, Walker. 



Wings hyaline, or with only the costa brownish, and 



not clearly divided a« in dvconitio*. 6. 



