300 DIPTERA OF AUSTRALIA, 



fore legs tibia about twice the length of metatarsus. Wings the 

 length of entire body, hyaline, with a pale, almost silvery, reflec- 

 tion, very sparingly pubescent near anterior border and apex, and 

 a longitudinal line of extremely short hairs running mid-way 

 between principal veins and along courses of branches of rudimen- 

 tary third longitudinal fork ; costal, first two longitudinal veins, 

 middle cross-vein and basal portion of fourth longitudinal pale 

 brownish. Auxiliary vein indistinct ; first and second longitudinal 

 veins reaching costa considerably before middle of wing, and 

 before base of fifth longitudinal fork ; both marginal cells obliter- 

 ated by confluence of veins ; fork of fourth longitudinal very pale^ 

 invisible at base, the anterior branch straight, joining margin imme- 

 diately above apex of wing, posterior branch bent a little posteriorly 

 at its tip ; fifth longitudinal fork rather short, anterior branch 

 about twice the length of posterior. 

 Hah. — Sydney (Skuse). December. 



281. Ceratopogon nigellus, sp.n. (PL xiii., fig. 38). 



9. — Length of antennae 0'017 inch ... 042 millimetre. 



Expanse of wings 0-037 x 0-015 ... 0-92x0-38 



Sizeof body 0-040x0-010 ... 1-01x0-25 



Black, opaque; scutellum ochreous-yellow, and generally a very 

 small spot of same colour or paler at humeri. Halteres white, 

 base of club and stem dusky brown or black. Abdomen not quite 

 twice length of thorax, brownish-black, sparingly clothed with 

 yellowish hairs. Tibiae and tarsi more or less yellowish-brown. 

 In fore legs tibia nearly thrice the length of metatarsus. Wings 

 nearly length of entire body, pellucid, almost hyaline, with a 

 delicate brownish tint and brassy roseous reflections ; costal, first 

 two longitudinal veins, middle cross-vein, and basal portion of 

 fourth longitudinal yellowish-brown. Auxiliary vein pale and 

 indistinct ; first longitudinal vein reaching costa almost opposite 

 but immediately before base of fifth longitudinal fork ; second 

 joining a little beyond, at a point in middle of anterior border ; 



I 



