BY ARTHUR WHITE. 39- 



in mouutaiii streams, and on windows. The different species 

 occur from earlj spring to late autumn. 



Table of the Tasmanian Genera of Leptidce. 



1. Antennae with third joint annulated. 



Metoponia., Macq. 

 Antennae with third joint not annulated. 2 



2. Fourth posterior cell closed. Clesthentia, Gen. nov. 

 Fourth posterior cell not closed. 3 



3. Antennae with a long thread-like arista. 



Chrysopiltjs, Macq. 

 Antennae with a thickened arista. 4 



4. Discal cell with three issuing veinlets ; the upper branch 



of postical vein arising from second basal cell. 



Atherimorpha, Gen. nov. 

 Discal cell with four issuing veinlets or traces of them, 

 the 1st, 2nd, and 4th complete, the 3rd abortive, the 4th 

 being the upper branch of the postical vein. 



Spaniopsis, Gen. nov. 



1. Chetsopilus, Macq. 



Dark coloured flies, decked in life with golden pile ; 

 antennae with the arista thread-like ; hind tibiae with only one 

 spur. 



Head broader than the thorax ; face scarcely descending 

 beneath the eyes. Eyes joining in the male, but widely 

 separated in the female. Antennae with all joints small, the 

 third bulbose, and terminated by a long thin arista. Thorax 

 and abdomen covered with golden or pale yellow pile, which 

 is very easily rubbed off. Legs long and slender, with the 

 basal joint of the tarsi especially lengthened ; anterior tibiae 

 without spurs, the middle tibiae with two spiirs, and the hind 

 tibiae with one spur. Wings broad, with the anal cell always 

 closed. 



This genus is of very wide distribution, a number of 

 species having been described from Europe, Asia, and North 

 and South America. In Tasmania two species occur; they 

 may be distinguished as follows: — 



1. Thorax black, unstriped ; femora, light brown ; pile in. 

 the male golden. Larger species. 



C. RTJFiPES, Macq. 



2. Thorax drab, striped ; femora wholly black ; pile in the 

 male light yellow. Smaller species. 



C. TASMANIENSI8, Sp. nOV. 



