BY FREDERICK A. A. SKUSE. 245 



the distance from tip of first longitudinal vein to tip of third 

 longitudinal \ fourth longitudinal very pale and indistinct beyond 

 cross-vein, disa})pearing some distance from wing-margin, its tip 

 situated at a point much nearer to tip of third longitudinal vein 

 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. 



Eab. — Mount Lofty and Adelaide, South Australia (Mr. T. P. 

 O. Tepper). June and October. Two specimens in the collection 

 of the Adelaide Museum. 



234. Chironomus fluviaticus, sp.n. 



^.—Length of antenna 0-050 inch ... 1-27 millimetres. 



Expanse of wings. 0*105 x 0-023 ... 2-67x0-58 



Size of body 0-160x0-020 ... 4-06x0-50 



Antennae light and somewhat bronzy, brown ; first joint of 

 scapus deep brown or black, second and few following flagellar 

 joints ochreous-yellow. Head deep brown or black, with some 

 short brownish hairs. Clypeus and palpi deep brown or black, 

 with a brown pubescence. Thorax deep brownish-black, dull, 

 traversed (when viewed at a certain obliquity) by two longitudinal 

 more or less hoary narrow stripes, extending from humeri to 

 scutellum, sparingly beset with yellow hairs ; also an intermediate 

 double row of short hairs reaching to middle of thorax ; pleurae, 

 pectus, scutellum and metanotum black, the scutellum fringed with 

 yellow hairs. Halteres yellow. Abdomen very slender, rather 

 more than three times the length of thorax, deep dull black, rather 

 densely clothed with moderately long yellow hairs; anal joint 

 black, forceps brown. Coxse black. Remaining joints sordid 

 ochreous-yellow, tips of femora and tibial spurs dark brown. 

 In fore legs metatarsus |- longer than tibia. Wings shorter than 

 abdomen, pellucid, with a very pale bluish tint ; veins very pale 

 brownish-yellow; dull pale brassy reflections. Costal and third 

 longitudinal veins meeting a short distance before apex of wing ; 



