BY ARTHUR WHITE. 



221 



Head about the same breadth or a little narrower than 

 the thorax. Eyes separated in both sexes, very rarely 

 joined in the male. Proboscis in length abont the height 

 of head. Antennae equal in length to or a little longer 

 than the head, the first and second joints short, the third 

 conical, tapering, and terminated by a two-jointed style. 

 Thorax with acrostichal, dorsocentral, and notopleural 

 bristles, and also, usually, a himieral, posiliumeral, sup- 

 raalar, and postalar bristle on each side; metapleura 

 without bristles. Abdomen slender, nearly bare, trun- 

 cate in male, pointed in female. Legs of medium length, 

 the anterior tarsi in male with the first joint conspicu- 

 ously dilated, the shape differing in each species. Wings 

 with the mediastinal vein short, curved up at its end, 

 and meeting the costa ; cubital vein with a long, narrow 

 fcrk ; discal cell with three issuing veinlets ; anal vein 

 weak and generally abbreviated. 



The species of HiJara occur commonly skimming over 

 the surface of ponds and streams, or, more rarely, over 

 the bare ground. Most of the Tasmanian species are found 

 in the spring time, but one occurs in the late autumn. 



-Fig. 41, 



Right front leg of (a) HiJara efficient, (b) H. hal- 

 (c) H. nimia, (cl) H. nuhila, (e) H. mollicella. 



Tahh of the Tasmanian Si^ecies of Hilar a. 



Halteres black or dark brown. 2 



Hal teres yellow or very pale brown. 3 



Wings brown ; thorax brown, striped ; anterior tibiae 

 in male with uniform short hairs; large, robust 

 species. (Length, 6 mm.) Efficiens, Sp. nov. 



Wings almost hyaline ; thorax black, unstriped ; an- 

 terior tibiae in male with very long hairs ; small, 

 delicate species. (Length, 3 mm.) 



Balneaeia, Sp. nov. 



