600 DIPTERA OF AUSTRALIA, 



situation of the head, size of the coxae, and length of the first 

 longitudinal vein ; while the character of the proboscis and the 

 venation of the wings afford characters very distinctive from any 

 hitherto described genus in either family. 



463. Lygistorrhina insignis, sp.n. (PI. xix., fig. 1.) 



$. — Length of antennae 0"33 inch ... '84 millimetre. 



Expanse of wings 0095x0-037 ... 2-39 x 090 



Size of body 0-130 x 0-017 ... 3-30x0-42 



Head and antennae black ; the latter densely covered with a 

 microscopic pubescence. Proboscis rather more than half the 

 length of entire body, sordid ochreous, growing dusky towards the 

 tip. Thorax deep brown, opaque, covered with very short black 

 hairs ; pleurae somewhat shining. Halteres yellow. Abdomen 

 black, somewhat shining, clothed with short black hairs, the third, 

 fourth and fifth segments bordered anteriorly with ochraceous ; 

 terminal lamellae yellow. Legs with a dense microscopic pubes- 

 cence. Coxse deep brown, the anterior pair sordid ochreous. 

 Femora ochreous ; the hind pair broadly flattened, longer than the 

 others, with almost the apical half deep brown or black. Tibiae 

 sordid ochreous ; the hind pair almost twice the length of the 

 anterior pair, gradually thickened towards the apex, deep brown 

 or black at the apex. Tarsi black ; the metatarsus in the hind- 

 legs nearly the length of the remaining joints taken together. 

 Wings hyaline, with a pale greyish cloud above the fork of the 

 fifth longitudinal vein, and the apex infu seated with greyish ; 

 brilliantly iridescent ; veins deep brown. Venation as described 

 in the generic diagnosis. 



Hah. — Dunoon, Richmond River, N.S.W. (Helms). A single 

 specimen in March. 



Sub-section V.— CEROPLATIN^. 



Genus Ceroplatus, Bosc, 



Ceroplatus, Bosc, Proc. Linn. Soc. N.S.W. (2), III., p. 1163, 



1888. 



