BY ARTHUR WHITE. 197 



-dark brown, and with two similarly coloured anal tufts ; 

 legs pale red ; wings spotted. 



Length. Male, 12-13 mm. 



Length of proboscis, 5 - 5.5 mm. 



Hab. Southern and Northern Tasmania. 



Wing of Systorehus crassiis. 



Male. Face covered with pale golden pubescence, front 

 with darker golden pubescence. Proboscis black, 



moderately slender. Antennie black, the first joint 

 twice the length of the second, and bearing long 

 black hairs, the third about one-and-a-half times 

 the length of the first two together, cylindrical, 

 tapering towards the apex, which is clearly truncated, and 

 terminated by a short, very thin, pointed style. Thorax 

 deep drab, covered with similarly coloured dense pubes- 

 cence, which, however, if viewed from the front, appears 

 a very pale golden-brown. Abdomen covered with dense, 

 very pale brov^^n pubescence, with a dark brown band 

 across the centre, and two dark brown sub-apical tufts. 

 Legs light red, the bristles of the tibiae similarly coloured ; 

 tarsi apically darkened. Wings hyaline, the foremargin 

 brown, and brown spots situated near apex of first basal 

 cell, at apex of second basal cell, at each lower corner of 

 the discal cell, and at base of the cubital fork. 



This splendid insect, the finest of the Tasmanian Bomhy- 

 liclce, may be easily recognised by its banded abdomen and 

 spotted wings. It occurs hovering over low flowers in the 

 spring time, and moves with extreme rapidity, appearing 

 in front of a flower one moment, and vanishing the next. 

 It probably occurs not uncommonly in suitable localities. 

 My dates range from October 21 to November 9. 



45. SiSYROMYiA, Gen. nov. (Figs. 35 and 36) 



Thorax and abdoimen broad, bearing long furry pubes- 

 cence ; proboscis long and frequently thickened ; wings 

 with the first posterior cell open, and the first and second 

 basal cells of almost equal length. 



Head about equal in breacCth to the thorax. Proboscis 

 long, frequently thickened, and with the tip sometimes ex- 



