BY T. H. JOHNSTON AND M. J. BANCROFT. 185 
The latter on the prescutum generally diverge out- 
wardly (fig. 4). The scutellum is silvery-grey with a black 
triangular patch at its anterior border, the apex of the 
triangle directed backwards. There is also a faint dark 
marking at the posterior end of the scutellum. It is not 
proposed to refer to the chaetotaxy, though the fly is 
very hairy. 
g 
M.australis 
M. veTusTissima g 
Wings. The wings are clear, and the veins pale 
brownish-yellow towards the base. The venation is figured 
in fig. 7. The wing is a stouter and broader structure 
than that of the house fly. The radial longitudinal nervure 
R 4-+5 is nearly straight, as is also R 2+3. 
Macquart (p. 153, pl. 20, fig. 10) states that the nerve 
of the discoidal cell, i.e., the medial transverse nervure 
bounding the first medial cell, is almost straight. It is, 
however, slightly sinuous and approximates that of 
M. domestica. The medio-cubital transverse nervure is 
relatively long and more inclined than in J. domestica. 
The medial cell is somewhat differently shaped as will be 
seen on comparing figs. 7 and 9. The alula is relatively 
slightly larger than in the house fly. 
