2 88 DIPTERA OF AUSTRALIA, 



Genus 10. Leptoconops, gen.nov. 



Antennae in 9 2- + 11-jointed ; first joint of scapus large, disci- 

 form ; second smaller, globose ; flagellar joints globose, gradually 

 diminishing in size, more ovate towards apex, terminal joint 

 elongate-ovate. Proboscis prominent. Palpi 4-jointed ; first and 

 second joints small, third greatly incrassated, about three times 

 the length of first or second ; fourth not as long as last, slender, 

 cylindrical. Wings naked. All longitudinal veins taking their 

 origin at the base of the wing. Marginal cross-vein present. 

 Middle cross-vein wanting. Fourth and fifth longitudinal veins 

 only forked. 



272. Leptoconops stygius, sp.n. (PI. xiii., fig. 29). 



5. — Length of antennae 0-017 inch ... 0-42 millimetre. 



Expanse of wings 0*050 x 0-020 ... 1-27x0-50 



Size of body 0-065 x 0-017 ... 1-66 x 0-42 



Entirely black. Joints of the antennae with dense light greyish 

 verticils. Head and thorax levigate, with minute black hairs. 

 Abdomen about twice the length of thorax, opaque, with some 

 minute black hairs; lamellag very long, slender. Legs slender. 

 Hind metatarsus J- longer than second tarsal joint. In fore legs tibia 

 rather more than twice the length of metatarsus. Wings hyaline, 

 rather weakly iridescent ; costal and first two longitudinal veins 

 greyish-brownish, the rest pale and indistinct. Auxiliary vein not 

 distinguishable, apparently wanting ; first and second longitudinal 

 veins reaching costa before middle of anterior border, confluent at 

 tips, tip of second longitudinal almost opposite, but immediately 

 beyond tip of posterior branch of fifth longitudinal vein ; marginal 

 cross-vein indistinct ; marginal cell small ; third longitudinal vein 

 arcuated, not quite reaching the margin, terminating a little above 

 the apex of the wing ; fourth longitudinal bellied downwards at 

 middle, reaching margin a little below apex of wing, the posterior 

 branch detached ; fork of fifth longitudinal wide, the anterior 

 branch twice the length of the posterior. 



Hah. — Woronora (Skuse). October. 



