116 DIPTERA OF AUSTRALIA, 



length of the first, subcylindrical, slightly produced beneath ; 

 third to ninth progressively decreasing in size, ohtrigonate, with 

 a very short pedicel anteriorly ; penultimate joint slender, the 

 terminal one small. Collare usually more or less mottled with 

 whitish. Thorax brown ; a broad irregular whitish or yellowish 

 band laterally, from before humeri to suture; a dark brown 

 median line usually distinctly traversing the thorax, with a small 

 yellowish spot on each side at the pronotum and a rather large 

 one, followed by a short indistinct stripe on each side, before the 

 suture ; behind the suture a broad white band extends to and 

 includes the scutellum ; three white or yellowish spots on each 

 side, two against the suture and the third above the origin of the 

 wings ; pleurfe with a lai'ge white spot beneath the wings and a 

 small one between the origin of the wings and the fore coxee ; 

 metanotum with two white spots. Halteres fulvous, the club 

 black. Abdomen brownish-fulvous ; first segment white at the 

 sides ; venter with the segments white at the sides. Coxa^ 

 white ; trochanters dark brown. Femora and tibise brownish- 

 fulvous, dark brown at the tips. Tarsi brown. Wings whitish, 

 much marbled with brown and greyish ; a roundish clear spot in 

 anal angle, a larger spot at tip of seventh longitudinal vein; 

 another just before tip of sixth longitudinal vein, others at tip of 

 second longitudinal vein, centre of discal cell, basal half of first 

 and whole of second posterior cell ; several more or less con- 

 spicuous ones ; veins brown ; stigma inconspicuous. 



^a5.— Tasmania ; South Australia ; and Sydney, N.S.W. 

 (Masters). Eight specimens for comparison. 



Ohs. — This insect has been characterised under three different 

 specific names from specimens obtained in Tasmania, and Adelaide? 

 South Australia. 



418. IscHNOTOMA PAR, Walker. (PL v., fig. 18.) 



Ptilogyna jjar, Wlk., Ins. Saund. Dipt. p. 446, 1856. 



(J.— Length of antennae 0-120 inch ... 3-04 millimetres. 



Expanse of wings 0-750 x 0-150 ... 19-05x3-81 



Sizeof body 0-680x0-100.'.. 17-26x2-54 



