BY FREDERICK A. A. SKUSE. 257 



pale, indistinct, joining costa about mid- way between middle cross- 

 vein and tip of first longitudinal ; third longitudinal vein joining 

 costa very much before apex of wing; costal vein extending 

 beyond third longitudinal vein almost ^ distance from that to tip 

 of fourth longitudinal; the tip of latter indistinctly reaching wing- 

 margin, situated considerably nearer to tip of third longitudinal 

 than to that of anterior branch of fifth longitudinal fork ; second 

 longitudinal vein pale, joining costa somewhat before mid-way 

 between tips of first and third longitudinal veins; base of fifth 

 longitudinal fork lying much beyond middle cross-vein, and almost 

 opposite the tip of auxiliary vein, its posterior branch J the length 

 of anterior. 



Hob. — Lawson, Blue Mountains, N.S.W. (Masters). January. 



249. Orthocladius venustulus, sp.n. (PI. xi., fig. 12). 



(J. —Length of antennae 0*032 inch ... 0*80 millimetre. 



Expanse of wings 0-065 x 0-017 ... 1-66x0-42 



Size of body 0-085x0-015 ... 2-14x0-38 



Antennte light greyish-brown, plumes with pale reflections ; 

 first joint of the scapus deep brown or black, levigate, second pale 

 yellow. Head and clypeus brownish-black. Palpi light greyish- 

 brown. Thorax deep brownish-black, levigate, somewhat pruinose, 

 with two longitudinal rows of brownish hairs ; pleurae pitch-brown; 

 pectus dark brown or brownish-black ; scutellum pitch-brown ; 

 metanotum black or deep brownish-black. Halteres pale yellow. 

 Abdomen nearly three times length of thorax, pitch-brown, 

 levigate, rather densely clothed with brown hairs ; anal joint and 

 forceps pitch-brown. Legs light greyish-brown to pitch-brown, 

 densely pubescent. Wings about the length of abdomen, pellucid, 

 with a delicate violaceous tint and brassy reflection, veins sordid 

 pale ochreous. Costal and third longitudinal veins meeting 

 immediately before apex of wing ; auxiliary vein indistinctly 

 joining costa opposite tip of posterior branch of fifth longitudinal 

 fork ; second longitudinal very pale, running close to first longi- 

 tudinal, afterwards close to costa, terminating a little beyond tip 

 17 



