(588 DIPTERA OF AUSTRALIA, 



than the }>osterior l»ranch ; branches running parallel for the 

 greater part of their lengtli, scarcely divergent at the tips, the 

 posterior branch very little arcuated at the base, and almost 

 straight ; branches of the fourth longitudinal vein considerably 

 more distinct than the third longitudinal. Jg three times the 

 length of gli; Jcl almost imperceptibly shoi-ter than Im. 



^. — Antennae about as long as the head and thorax together ; 

 flagellar joints sub-sessile, l^ to 2| times as long as broad, the 

 pedicels very minute ; terminal joint longer and thicker than the 

 ]ireceding ; joints of the scapus brown. Abdomen wider than the 

 thorax, almost cylindrical, uniform umber-brown, rather sparsely 

 pubescent ; laraellfe of the ovipositor small, oval, black or deep 

 brown, with a very short dense pubescence. Branches of the fork 

 of the third longitudinal vein not running so parallel to one-another 

 as in the (^ but gradually divergent. 



Hub. — Elizabeth Bay (Skuse). January. 



10 J. SCIARA CAVATICA, sp.n. 



^. — Length of antennse 0"030 inch ... 0*76 millimetre. 



Expanse of wings 0-075 x 0-025 ... 1-89x0-62 



Sizeofbody 0065x0-015... 1-66x0-38 



Antennae pitch-brown, with a bright yellowish -brown pubes- 

 cence ; slender, about half the length of the body ; basal 

 joints rather paler than those of the flagellum, and not so thickly 

 haired ; flagellar joints sub-sessile, the pedicels more distinctly 

 visible towards the tip where they are about ;|^ to 5 the 

 length of the joints ; all but the terminal joint about one-half 

 longer than broad, the latter being about one-half longer than 

 the preceding ; pilose. Head black. Eyes contiguous above. 

 Thorax black, or deep brown, levigate, with two longitudinal 

 double rows of short yellowish-brown hairs ; humeri slightly 

 tipped with ochraceous ; scutellum pitch-brown, with some 

 yellowish reflections on the posterior border, sparsely covered 

 with a moderately long yellowish pubescence. Halteres pitch 

 brown, ochraceous at the Vjase of the stem, with a minute 



