246 DIPTERA OF AUSTRALIA, 



auxiliary vein scarcely visible towards its tip, apparently termin- 

 ating about opposite middle of posterior branch of fifth longitudinal 

 fork; second longitudinal vein tolerably distinct, pale, joining 

 costa at a point somewhat more than J the distance from tip of 

 first longitudinal to tip of third longitudinal; fourth longitudinal 

 pale, almost reaching margin, its tip situated somewhat nearer to 

 tip of third longitudinal than to that of anterior branch of fifth 

 longitudinal fork ; base of latter lying a little beyond middle cross- 

 vein, its posterior branch ^ the length of anterior. 

 Hah. — Nepean River, N.S.W. (Skuse). September. 



235. Chironomus subvittatus, sp.n. 



(J. — Length of antennae 0*045 inch ... 1-13 millimetres. 



Expanse of wings 0-090 x 0-022 ... 2-27x0-55 



Sizeof body 0-120x0-020 ... 3-04x0-50 



Antenn96 ochreous-brown with yellow plumes ; basal joint 

 black. Head, face, and clypeus black. Palpi ochreous-brown. 

 Thorax pitch-brown, nitidous, with three indistinct black stripes ; 

 three longitudinal rows of yellow hairs ; pleurse and pectus black ; 

 scutellum pitch-brown ; metanotum black. Halteres pale yellow. 

 Abdomen rather more than twice the length of thorax, black, 

 sub-nitidous, clothed with tolerably long yellow hairs ; anal joint 

 and forceps black. Legs pale ochreous-yellow ; last four joints 

 of tarsi in fore legs, and last three in intermediate and hind legs 

 somewhat infuscated. In fore legs metatarsus about twice the 

 length of tibia. Wings rather shorter than abdomen, hyaline, with 

 brassy reflections ; costal, first and second longitudinal veins, middle 

 cross-vein, and basal half of fourth longitudinal brownish-ochreous. 

 Costal and third longitudinal veins meeting a short distance 

 before apex of wing ; auxiliary vein very indistinct towards tip, 

 joining costa about opposite middle of posterior branch of fifth 

 longitudinal fork ; second longitudinal vein pale, fairly distinct, 

 running nearer to third than to first longitudinal vein, reaching 

 costa at a point about J the distance from tip of first to tip of 

 third longitudinal vein ; fourth longitudinal vein pale beyond 



