50 TIIK DIPTBBA.-BEA.CHTCEEA «»K TASMANIA, 



bright orange, in dried specimens orange-brown, each seg- 

 ment with a large dark brown spot, which occupies all 

 the segment except the side and hindmargins, but these 

 spots may sometimes be so extensive as to occupy almost 

 all the dorsum, or, on the other hand, those on the first 

 and second segments may be much reduced ; the dorsum 

 bare, with scattered black hairs along the sides; under 

 side of abdomen orange-brown, with segmentations of ante- 

 rior segments while Legs orange-brown, the femora with 

 a few. the tibia? with many, black bristles; tarsi darkened 

 towards the tips. Wings light brown, entirely without 

 markings. 



This species, judging from Macquart's description, seems 

 to be allied to his P. nudifemorata, but may be distin- 

 guished by the antenna? being orange instead of black, 

 by the thoracic stripes being light brown instead of black, 

 and by the abdomen being orange-brown instead of grey. 



P. Intra as a rule occurs very sparingly. It may be 

 met with frequenting small pools in the bush, settled 

 on bracken, or, occasionally, on windows. The male is 

 unknown. Mv dates range from October 4 to Decem- 

 ber 19. 



PSILOCEPHAT.A NI't'KNS, Sp. l)OV. 



An extremely small species. Antenna? orange, very 

 short; thorax light grey, with two darker grey stripes; 

 abdomen grey, covered, in the male, with silvery toraen- 

 tum ; legs light brown ; wings tinged with brown. 



Length. Male, 5 mm. 



Hab. Hobart, 



Male.. Head chiefly occupied by the large eves, which 

 join for a short distance in the middle of the front. Face 

 white, the mouth aperture large. Proboscis orange, lying 

 close against the face. Antenna? extremely short, the first 

 and second joints particularly so, the third a little longer 

 than the first and second together. Thorax light grey, 

 with two darker grey stripes, one on each side of the 

 middle, and dark grey mottlings towards the sides; dorso- 

 central bristles complete and well-defined ; BCutellum dark 

 grey with a silvery border and two black terminal bristles. 

 Abdomen grey, completely covered with silvery tomentum, 

 and bearing soft white pubescence; genitalia very large, 

 orange, with black pubescence, Legs liidit brown, the hind 

 femora with a suffused black stripe above; apex of tibia? 

 and tips of tarsal joints black. Wings with\a brown tinge, 

 but altogether without markings. 



This species is quite distinct; it may be readily recog- 



