NOTES ON QUEENSLAND FLIES.— JOHNSTON AND BANCROFT. 



37 



is indicated in fig. 19. To the naked eye the squame appears opaque and some- 

 what pearly. 



Legs. — The characters of the tarsi of the third leg are shewn in fig. 29. 



Abdomen {fig. 3). — The fly can be very readily distinguished from 

 M. vetustissima and M. fergusoni by the pale-yellow abdomen in both sexes. 

 There is dorsally a median narrow brownish stripe, interrupted in the middle 

 of the first abdominal segment. It is more pronounced in some individuals 

 than in others, being occasionally reduced to a brownish blotch on the posterior 

 edge of each segment. Whitish reflections are visible posteriorly and postero- 

 laterally. The abdomen is well provided with long chata?. The ventral surface 

 is pale yellow with brownish colouration in the vicinity of the genital aperture. 



FEMALE. 

 Head (fig. 12). — The head of the female differs from that of the male 

 in the following particulars : — The eyes are widely separated, the distance between 

 Ihem, where they approach most nearly, being about a third of the total width 



Text -fig. 21, Tarsi of third leg — final segments only — all drawn to same scale, 

 M. australis male; 22, M. australis female; 23, M. vetustissima male; 24, M. vetustissimu 

 female; 2.5, M. clcmestica male (for comparison); 26, M. domestica female; 27, M. terroe- 

 regincB male; 28, M. terrce-regince female; 29, M. hiUi male; 30, M. hilli female. 



of the head, whereas in the case of the male it is about one thirtieth. There is 

 a broad shallow dusky frontal stripe bounded by strongly incurving fronto- 

 orbital bristles. On each side of the stripe is a fairly wide parafrontal which, 

 as in the case of the male, is silvery. 



Thorax [fig. 4). — The female thorax has much the same characters as 

 the male. 



Wing. — The wing (fig. 20) differs from that of the male in the shape of 

 the first posterior cell (fifth radial) and also in the form of the elbow of the 

 fourth longitudinal vein (M. 1 -|- 2) and its relation to the posterior cross- vein 

 ''raediocubital). 



