BY ARTHUH WHITE. 85 



genus bv the scutelluin being armed, and bv the third, antennal 

 joint consisting of four, instead of six segments. 



Geranopus may be easily distinguished from all the other Aus- 

 tralian genera by the extremely long, posterior tarsi, the first 

 joint of which is longer than the whole of the posterior tibia>, in 

 conjuTiction with the antennal arista. 



This genus is proposed for a species which, up to the present, 

 has been taken only in Victoria. 



Geranopus purpuratus, sp.nov. (Figs. 5 and 6). 



Front, thorax, and scutellum black; scutellar spines, and 

 margin of scutellum, between the spines, light brown; abdomen 

 dark purple; femora black; tibia? and first joint of tarsi white, 

 with apices black; remaining tarsal joints black: wings light 

 brown, witlx base and apex clear. Length, ^, 11; 5, 10-11 mm. 



Hab. — -Victoria. 



Fig. 6. — Wing of Geranopus purpuratus. 



Male. - Face and front black, the latter, owing to the joined 

 eyes, being reduced to a small, triangular strip adjoining the 

 vertex. Eyes bare, and, unlike the female, without any posterior 

 rim. Thorax black, shining, minutely punctate, with fairly 

 long, whitish pubescence at sides; scutellum black, with the two 

 spines, and margin between the spines, light brown. Abdomen 

 dark purple, minutely punctate, with white pubescence on sides. 

 Legs with femora black; tibife and first joint of tarsi white, with 

 apices black; remaining tarsal joints black. Wings light brown, 

 with base and apex clear. Halteres pale yellow. 



Female resembles the male, but the head is much smaller, the 

 eyes widely separated, front broad and wrinkled longitudinally. 



