BY ARTHUR WHITE. 49 



antenna} black ; front white anteriorly, brown posteriorly ; 

 thorax yellowish-grey with black stripes ; abdomen grey, 

 with black transverse spots; legs red; wings yellowish. 



Length. Female, 4 1/3 lines. 



This species, described by Macquart under the name 

 Thereto, nudifemorata, is unknown to me; von Krober 

 states that it belongs to the genus Psilocephala, and I place 

 it here on his authority ; the genus Thereva does not occur 

 in Australasia. 



Psilocephala lutea, Sp. nov. (Fig. 24). 



Front light brown ; thorax light brown with three 

 brown stripes; abdomen, orange-brown — in life bright 

 orange ■ — ■ each segment with a large dark brown spot, but 

 if the spots are unusually large and confluent, the abdo- 

 men then appears dark brown with an orange-brown bor- 

 der; legs yellow; wings light brown, entirely without 

 markings. 



Length. Female, 8-9.5 mm. 



Hab. Bagdad Valley. 



Fig. 24. Wing of Psilocephala lutea. 

 Female. Eyes widely separated. Proboscis and palpi 

 dull orange, both concealed within the mouth aperture. 

 Face small, the antennae being situated towards the lower 

 part of the head, pale yellow-brown, with a dark brown 

 stripe joining the eyes to the base of the antennae. 

 Antennao with first joint somewhat swollen, light brown 

 with black bristles, the second and third joints orange, 

 the second being very small, the third expanded and about 

 the length of the first, and terminated by a black style. 

 Front broad, the lower third pale whitish-brown, bounded 

 above by two short brown stripes, which represent the 

 frontal spots of Anabarrhynchus ; upper two-thirds brown. 

 Thorax light brown, with three somewhat indistinct lon- 

 gitudinal brown lines; the dorso-central bristles only 

 developed posteriorly, where they are represented by three 

 pairs of long black prescutellar bristles; scutellum grey- 

 brown, with two terminal black bristles. Abdomen in life 



