402 DIPTERA OF AUSTRALIA, 



Abdomen umber-brown, paler between the segments, the terminal 

 segments black ; wider in the middle than the thorax ; lamellae of 

 the ovipositor black, oval. Coxae and femora sordid yellow ; 

 brown in the hind-legs ; tibiae and tarsi brown, the terminal joints 

 of the latter black. In the fore-legs the tarsi somewhat longer 

 than the tibise ; in the intermediate-legs the tibiae and tarsi of 

 equal length ; in the hind-legs the tibiae somewhat longer than 

 the tarsi. Spurs short, yellow. First joint of the tarsi 3 times 

 the length of the second ; second joint longer than the third and 

 slightly shorter than the fourth and fifth together ; the latter two 

 of equal length. Wings pellucid, almost hyaline, with a very 

 faint brownish tint, and having brilliant reflections ; costal and 

 first two longitudinal veins deep brown. First longitudinal vein 

 joining the costa some distance before the base of the fork ; cross- 

 vein distinct ; petiole paler than the foi'k, equal in length to the 

 anterior branch ; branches slightly, the anterior scarcely, diver- 

 gent towards the tips ; posterior branch slightly undulated, /g 

 almost 4 times the length of gh ; M somewhat longer than Im. 



Hah. — Mossman's Bay, near Sydney (Froggatt). August. 



Ohs. — Comes between S. dolosa, Sk., and S. festina, Sk. 



456. SCIARA SERENIPENNIS, Sp.n. 



(J.— Length of antennae 0-070 inch ... 1-77 millimetres. 



Expanse of wings 0090 x 0-033 ... 2-27 x 0-84 



Size of body 0-085x0-016 ... 2-14x0-40 



Antennae black, densely covered with a yellowish or brownish 

 pubescence ; slender, nearly as long as entire body ; flagellar 

 joints sub-sessile, 2^ to 3 times as long as wide. Head black, 

 levigate. Eyes contiguous above. Palpi dark brown. Thorax 

 black, sub-nitidous, with three longitudinal rows of yellowish 

 or brownish hairs ; intermediate row short, with minute hairs, 

 scarcely reaching middle of thorax ; lateral ones double or treble, 

 reaching scutellum ; some long hairs on the lateral borders and scu- 

 tellum. Halteres black, the stem brown. Abdomen black, levigate, 

 sparingly clothed with short yellowish hairs ; not quite as wide as 



