622 DIPTERA OP AUSTRALIA, 



short, bent anteriorly ; petiole short, forming a straight line with 

 the posterior branch of the fork ; both branches apparently, but 

 not quite, reaching the margin ; fifth longitudinal vein straight, 

 without a branch ; seventh longitudinal vein nearly reaching the 

 margin. 



Hab. — Sydney (Skuse). A single specimen found on a window 

 in June. 



c. Two ocelli, one mi the inner border of each of the compound eyes. 



Genus Mycetophila, Meigen. 

 Mycetophila, Meig., I.e., p. 1211, pi. xxxii., figs. 15-1 5a. 



480. Mycetophila nigriventris, sp.n. 



^. — Length of antennae 0-073 inch ... 1-85 millimetres. 



Expanse of wings 0150 x 0-055 ... 3-81 x 1-39 



Sizeof body 0-150x0035 ... 3-81 x 0-88 



Antennae slender, longer than head and thorax taken together ; 

 joints of scapus and (sometimes) first flagellar joint yellow, both 

 joints of scapus with short black bristles at the apex ; flagellar 

 joints brown. Hypostoma and front black, the latter with a 

 yellow pubescence. Palpi yellow. Thorax brown, opaque, densely 

 covered with brown and yellowish pubescence; black setse laterally; 

 pleurfe and metathorax black or deep brown; scutellum ochraceous, 

 tinged with brown, with long black setae. Halteres pale yellow. 

 Abdomen much compressed from the sides, black, the last three or 

 four segments sometimes slightly bordered posteriorly with 

 ochraceous ; densely clothed with yellowish hairs ; ovipositor and 

 terminal lamellae brown. Legs robust. Cox£e, femora and tibiae 

 yellow ; the hind femora slightly tipped with dark brown at the 

 apex ; tibise slightly more brownish-yellow than the preceding 

 joints, the hind pair slightly tipped with dark brown at the apex ; 

 fore tibiae with a few minute spines on the outer side, the inter- 

 mediate with three ranges of long black spines, one on the inner 

 and two on the outer side, and the hind pair with two ranges on 



