BY FREDERICK A. A. SKUSE. 281 



dark brown. Halteres white. Abdomen in ^ very slender, three 

 times the length of thorax, whitish, with pale yellow hairs, third 

 to sixth segments more or less distinctly streaked or spotted with 

 brown, sixth and seventh often entirely brown; anal joint and 

 forceps yellowish or whitish ; in 9 nearly the breadth but not 

 twice the length of thorax ; uniformly brown, clothed with short 

 pale yellow hairs. Legs whitish or pale yellowish, numerously ringed 

 with brown. In fore legs tibia ^ longer than metatarsus. Wings 

 covered with short white or pale yellow hairs, limpid, with numerous 

 small brownish spots. Costal and third longitudinal veins meeting 

 much before apex of wing ; auxiliary vein indistinct, reaching 

 €Osta about mid-way between middle cross-vein and tip of first 

 longitudinal ; first longitudinal vein reaching costa in ^ mid-way 

 between middle cross-vein and tip of third longitudinal, in 9 

 nearer middle cross-vein ; marginal cross-vein almost parallel with 

 costa ; second longitudinal reaching costa in (J at a point f the 

 distance from tip of first to that of third longitudinal vein, more 

 than |- in Q ; fourth and fifth longitudinal veins pale beyond 

 cross-veins ; posterior cross-vein situated before middle cross-vein, 

 in ^ a distance rather greater than its length, in ^ somewhat less. 



Bab. — Nepean River, near Penrith, Blue Mts., and Sydney, 

 N.S.W. (Skuse). October. Not common. 



268. ISOPLASTUS LEVIDENSIS, Sp.n. 



/J. — Length of antennae 0-040 inch ... 1-01 millimetres. 



Expanse of wings 0-080 x 0*020 ... 2-02x0.50 



Size of body 0-110x0-020 ... 2-79 x 0-50 



Antennae yellowish-grey ; first joint of scapus light brown. 

 Head, front and clypeus light brown. Palpi somewhat sordid 

 ochreous. Thorax light ochreous-brown, opaque, somewhat prui- 

 nose, with three longitudinal, parallel rows of yellow hairs, lateral 

 ones along a distinct pruinose line, beginning just below humeri; 

 pleurae, pectus, scutellum and metanotum light brown. Halteres 



