102 DIPTERA OF AUSTRALIA, 



(J and $. — Joints of the flagellum black; pedicels sordid grey; 

 verticils greyish ; ^ with long hair on the upper side; basal joints 

 large, pale brownish; double joints very large, almost pyriforni ; 

 simple joints as long as the pedicels at the base of 

 the flagellum, pedicels increasing in length, and joints 

 decreasing in size towards the extremity ; last joint with 

 a long slender projection : ^ sub-sessile, sub-cylindrical, 

 three times as long as the pedicels; terminal joint with a small 

 conical process. Front yellowish-brown. Thorax pale brown, 

 nitidous, with long hairs, two rows from the collare to the 

 scutellum; scutellum prominent, sordid brown, with a row of erect 

 hairs. Halteres blackish, pale at the base of the stalk. Abdomen 

 sordid brown, dai-ker superiorly on the first two or three seg- 

 ments. f-iGgs exti'emely long, slender. Coxa) pale. Femora, 

 tibia, and tarsi blackish, the last joints with a greyish reflection. 

 Wings appearing blackish on account of their dense pubescence, 

 with a beautiful v-iolet reflection, the latter not quite so apparent 

 in the ^. The costal and the two first longitudinal veins brown ; 

 cross-vein rather indistinct ; the third longitudinal pale but 

 distinct, anterior branch nearly straight. (Description drawn 

 from dried specimens). 



Sab. — Sydney, Woronora, INliddle Harbour, and Blue ]\loun- 

 taius (Masters and Skuse). 



Obs. — This species may frequently be seen, like many of its 

 congeners, in great numbers in caves, hanging ujDon the long 

 threads of spiders' webs. 



53. DiPLOSIS SAXATILIS, Sp.n 



(J. — Length of antennoe 0.120 inch ... 3-04 millimetres. 



Expanse of wings 0110 x 0-040 ... 2-79x1.01 



Size of body 0080x0-018 ... 2-02x0-45 



9. — Length of antennae 0-040 inch ... 1-01 mi Dim et res. 



Expanse of wings 0-090x0-034 ... 2-27x0-86 



Size of body 0-075x0-020 ... 1-89 x 0-50 



