BY FREDERICK A. A. SKUSE. 723 



Genus 2. Trichosia, Winnertz. 



Trichosia, Winnertz, Beitr. z. Mon. cl. Sciarinen, 1867. 



Characters the same as in Sciara, with the difference that the 

 surface of the wings is distinctly hairy. 



Only a very few species of this distinct genus have yet been 

 described, but they come from widely different parts of the world, 

 so that this genus is no doubt represented in most countries. The 

 following is the first described from Australia ; othei's have been 

 recorded from Europe and North America : — 



137. Trichosia Mastersi, sp.n, 



(J. — Length of antennae 0'088 inch ... 2-14 millimetres. 



Expanse of wings 0-090 x 0-035 ... 2-27x0-88 



Sizeofbody 0-085x0'020 ... 2-14x0-50 



Q. — Length of antennae 0-047 inch ... 1-23 millimetres. 



Expanse of wings 0-100x0-040 ... 2.54x1.01 



Sizeofbody 0-110x0-030 ... 2-79x0-76 



(J. — Antennae pitch-brown, with a minute yellowish pubescence; 

 slender, the length of the body ; basal joints deep brown, 

 sparsely pubescent ; flagellar joints sub-sessile, 2^ to 3 times 

 as long as broad. Head black. Eye?; contiguous above. Palpi 

 black or deep brown. Thorax black, levigate, with three longi- 

 tudinal double rows of yellowish hairs, the intermediate one 

 indistinct ; setaceous hairs on the lateral margins and scu- 

 tellum. Halteres almost naked, smoky-yellow, with the base 

 of the stem a brighter yellow ; club large, pyriform. Abdomen 

 black, with a pale pubescence, narrower than the thorax, almost 

 cylindrical, gradually dilated towai'ds the middle ; foiceps black, 

 densely covered with a minute pubescence, considerably broader 

 than the terminal segment of the abdomen. T^egs yellowish-brown, 

 the under-sides of all the femora considerably brighter than the 

 other portions of the legs ; tarsal joints almost pitch-brown on 

 account of their minute dense pubescence. Fore femora shorter 

 47 



