270 DIPTERA OF AUSTRALIA, 



more than posterior half of thorax, also pleurse, pectus and 

 metanotum light ferruginous ; scutellum yellow ; no ferruginous 

 in 5. Hal teres yellow. Abdomen in ^ rather more than twice 

 the length of thorax, in § much shorter ; prasinous, clothed with 

 yellow hairs ; ^ anal joint and forceps short, brownish; 2 lamellae 

 of ovipositor yellow. Legs pale ochreous-yellow. Tibial spurs 

 black or deep brown. In fore legs metatarsus three times the 

 length of tibia. Wings in ^ as long as abdomen, in ^ longer 

 than whole body ; hyaline, with delicate brassy and roseous 

 reflections; veins yellow. Costal and third longitudinal veins 

 meeting some distance before apex of wings ; auxiliary vein 

 extremely pale and indistinct, reaching costa about mid-way 

 between middle cross-vein and tip of first longitudinal vein ; 

 first longitudinal reaching costa in (^ a little beyond, in ^ at a 

 point mid-way between middle cross- vein and tip of costa ; second 

 longitudinal very indistinct, reaching costa at a point about J the 

 distance from tip of first longitudinal to that of third longitudinal ; 

 middle cross-vein pale, scarcely oblique, appearing as a continuation 

 of basal portion of fourth longitudinal vein ; third longitudinal 

 appearing as a continuation of middle cross-vein ; fourth longitu- 

 dinal very pale and indistinct, bent considerably downwards at its 

 base, almost reaching wing-margin, its tip situated nearer to tip of 

 third longitudinal than to that of anterior branch of fifth longitu- 

 dinal fork ; base of latter lying somewhat beyond middle cross- 

 vein, its posterior branch in ^ more than -J the length of anterior, 

 about J the length in 5. 



Kab. — Sydney (Masters and Skuse). Very common. 



Obs. — Very like T. montanus, but the length of the metatarsus 

 of the fore legs affords a ready distinguishing character. 



260. Tanytarsus cereolus, sp.n. 



^. — Length of antennse 0-045 inch ... 1-13 millimetres. 



Expanse of wings 0-085 x 0-020 ... 2-14x0-50 



Size of body 0-100x0-015 ... 2-54x0-38 



