304 DIPTERA OF AUSTRALIA, 



the anterior branch reaching margin a little above apex of wing ; 

 fifth longitudinal indistinct. 



^rt5.— Hexham Swamps, near Newcastle, N.S.W. (Skuse). 

 Common in April. 



Ohs, — Somewhat allied to G. scutellahcs, Meig. 



285. Ceratopogon marmoratus, sp.n. (PL xiv., fig. 43). 



Q. — I-ength of antennae 0-057 inch ... 0*68 millimetre. 



Expanse of wings 0-057 x 0-025 ... 144 x 0-62 



Size of body 0-057x0017 ... 1-44x0-42 



Brown, sometimes very dark brown. Thorax pruinose, with 

 four indistinct spots without that appearance, two short longitu- 

 dinal lateral ones about the middle, and two median contiguous 

 diamond-shaped spots on the posterior half ; sparingly covered 

 with fine pale yellow hairs. Halteres more or less ochreous- 

 yellow. Abdomen about twice the length of thorax, clothed with 

 yellowish bands. Legs light brown, tarsi, more or less yellowish. 

 Femora with an indistinct yellowish ring just before tip, dark 

 brown at tip. Tibiae yellowish at base. In fore legs tibia twice 

 the length of metatarsus. Wings the length of entire body, 

 pellucid, with pale brownish-grey tint, brown between tip of second 

 longitudinal vein (from opposite base of fifth longitudinal fork) 

 and costa, and with several hyaline spots between the other veins ; 

 one includes the middle cross -vein, a larger one under brown 

 costal spot and continuing round to costa, and a smaller round 

 spot between last and apex of wing, two in fork of fourth 

 longitudinal, three or four between fourth and fifth longitu- 

 dinal veins, one on posterior margin between latter fork, and 

 lastly three or four spots between fifth longitudinal and pos- 

 terior angle ; with a violaceous reflection (except pale spots) when 

 viewed at a certain obliquity ; densely clothed with yellowish 

 hairs ; veins pale* brownish. Auxiliary vein indistinct ; first 

 longitudinal much curved at the marginal cross- vein, reaching 



