108 DIPTERA OF AUSTRALIA, 



Head, including rostrum, suctorial labella and joints of scapus, 

 reddish-fulvous ; palpi black ; flagellar joints of antennae black ; 

 antennae somewhat longer than the head; first flagellar joint short- 

 obconical, second narrower, shorter, ovate, third and fourth pro- 

 gressively narrower, elongate-pyriform, the remaining four joints 

 narrow, subcylindrical (PI. vi., fig. 40). Collare reddish-fulvous. 

 Thorax shining black ; a yellowish pruinose spot below humeri, and a 

 larger fulvous marking beneath on the pleurae, between collare and 

 origin of the wings ; pleurae and metathorax black, with a greyish 

 bloom ; scutellum reddish-fulvous. Halteres brownish with dusky 

 club. Abdomen : first two segments shining fulvous, the second 

 mai'gined posteriorly with black (which is produced anteriorly in 

 the middle for about half the length of the segment) ; third 

 and fourth segments entirely shining black, with a greyish bloom ; 

 remaining segments and genitalia shining reddish-fulvous ; venter 

 as above. Legs entirely black (in one specimen the base of femora 

 slightly fulvous). Tarsi in all legs more than twice and a-half the 

 length of tibiae, nearly three times their length in the hind pair. 

 Wings with a pale brown tint, the costal cell and stigma darker ; 

 veins brown, the costa and first longitudinal vein dark brown, 

 nearly black. 



Hob. — Blue Mountains, N.S.W. (Masters). Two specimens. 



06s.— Readily distinguished from all other species by its almost 

 entirely black thorax, black coxse, and in having the first abdominal 

 segment entirely fulvous, and the third and fourth segments black. 



413. Leptotarsus trivittata, sp.n. 



(J. —Length of antennae — inch 



Expanse of wings 0'650 x 0*150 .. 



Size of body 0-500 x 0-110 .. 



^. — Length of antennae 0-065 inch 



Expanse of wings 0-630x0-130 .. 



Size of body 0-450x0-100 ... 11-43x2-54 



— millimetres. 

 16-51 x3-81 

 12-70x2-79 



1-66 millimetres. 

 16-00x3-30 



