BY ARTHUR WHITE. 51 



nized by its small size, grey colouration, silvery tomentum 

 of the male, and thorax with two complete rows of dorso- 

 central bristles. 



P. nitens is only known from a single specimen taken 

 by Mr. G. H. Hardy at Hobart, on November 30, 1913. 



PSILOCEPHALA VENUSTA, Erichs. 



Syn. Thereva venusta, Erichs. 



Female. Front dull, black. Antennae bright orange, 

 with black bristles. Face black, dusted with grey. Mouth 

 opening and proboscis very large, the latter brownish. 

 Palpi bright yellow-brown. Thorax black ; scutellum 

 black, with a broad dark yellow border. Abdomen shin- 

 ing black-brown ; first segment dull, seventh and eighth 

 shining orange. Legs bright yellow, second to' fifth tarsal 

 joints brown ; femora with black pubescence ; tibiae and 

 tarsi with black bristles. Wings hyaline, with a brown 

 band across the small cross-vein, and brown tips. 



Length. Female, 10 mm. 



Hab. Tasmania. 



The above particulars are taken from von Krober's 

 description, the species being unknown to me. It should 

 be readily recognizable from the black front, and dark 

 abdomen with the seventh and eighth segments orange. 



PSILOCEPHALA OCCULTA, Sp. nOV. 



Antennas, front, and thorax black; the thorax with 

 two pale grey stripes ; abdomen dark brown ; femora dark 

 brown ; tibia; brown ; wings faintly mottled with black, 

 and with a narrow black stigma. 



Length. Fema-le, 8 mm. 



Hab. Bagdad. 



Female. Eyes separated, but not so widely as in P. 

 lutea, fringed behind with white hairs. Proboscis and palpi 

 black, the former more prominent than in the other Tasi- 

 manian species, and reaching slightly in front of the face; 

 the palpi rather shorter than the proboscis. Antennae 

 black, all joints very small. Front bare, black, narrower 

 above than below, the vertex fringed behind with short 

 black hairs. Thorax black, with two narrow pale grey 

 stripes ; dorso-central bristles represented by two or three 

 pairs of black prescutellar bristles. Abdomen dark brown. 

 Legs with femora dark brown, tibiae a lighter brown, with 

 short black bristles, tarsi brown. Wings small, mottled 

 indistinctly with black, and with a narrow black stigma; 



