268 Records of the S.A. Museum 



and third shorter, subcyliiidrical ; fourth to ninth short, the inner face produ(;ed 

 slightly to give the segments a roughly triangular appearance; terminal (twelfth) 

 segment cylindrical, tilifonn. In the female, the antennae appear to l)e only 

 eleven-segmented, the subterniinal segments serrated as in the male, but less 

 distinctly so. Head dark, greyish-pruinose, nari'owly rufous medially; vertical 

 tubercle reddish, infuscated medially, indistinctly trifid anteriorly; in the female 

 this tubercle is obscure reddish-l)rown. Mesonotal praescutum with the inter- 

 spaces buffy-grey; stripes grey, narrowly but conspicuously margined with dark 

 brown, the lateral margins of the median stripe becoming narrowed behind and 

 finally obliterated beyond three-fourths the length of the segment ; median stripe 

 split by a capillary dark brown line that ends immediately before the suture; 

 margins of the lateral stripes complete, crossing the suture ; scutum light grey, 

 the lobes darker grey, each with a dark brown semicircle that is conHuent with 

 the margins of the lateral praescutal stripes; scutellum and postnotum clear 

 light grey with a capillary brown line, the lateral margins of these selerites a 

 darker grey. Pleura light grey, narrowly darkened dorsally, before the wing-root 

 with a conspicuous triangular tubercle that is dark brown, the apex conspicuously 

 orange. Mesosternum greyish-brown. Halteres light brownish-yellow, the knobs 

 dark brown. Legs with the coxae light grey; trochanters dark brownish-grey; 

 femora black, the bases narroAvly fulvous; remainder of the legs black. Wings 

 with a greyish tinge; stigma pale brown; wing-surface sparsely variegated with 

 dusky,, these areas including the end of cell K- ; an area near the end of ceil M 

 adjoining vein Cu and narrow seams to the veins; outer ends of the anal cells 

 faintly darkened; an indistinct oblite^ati^'e area before the stigma, crossing cell 

 fir.st M- into the base of cell M"* ; veins tlark brown. Venation : R2+^ a little 

 longer than R^; Rs longer than R^+^ but shorter than R^; petiole of cell M^ 

 about equal to m; ni-cu short but indicated. xVbdominal tergite one buffy-grey, 

 infuscated dorso-medially ; tergites two to seven bright fulvous, the segments 

 conspicuously margined laterally with light grey; sternites similar but more 

 brownish-fulvous, the basal segments slightly pruinose ; segments eight and nine 

 dark brow'u. Ninth tergite narrowly margined laterally with fulvous. In the 

 female, the bright colour includes the eighth tergite. Male hypopygium having 

 the ninth tergite large, with a broad U-shaped median notch, the lateral angles 

 broadly i-ounded. Ovipositor with the valves long and slender. 



Hah. Tasmania: Waratah (H. J. Carter and A. M. Lea). Type, I. 12182. 



MACROMASTIX Osten Sacken, 1886. 

 MACROMASTIX BREVIPETIOLATA sp. nov. 



Nasus i)owerf ully developed ; antennae short ; head orange-yellow ; mesonotum 

 shiny testaceous-broAvn, the pleura more yellowish ; wings strongly suffused with 



