170 THE DIPTERA-BRACHYCERA OF TASMANIA, 



reddish beneath ; anterior coxae with a pencil of stiff black 

 bristles ; all femora with abundant long w4iite pubescence, 

 the posterior pair wath a few black bristles below; anterior 

 and middle tibije with long white pubescence, the middle 

 tibiae also bearing extremely long black hairs, and hair- 

 like bristlesi, on the inner side ; posterior tibiae with black 

 bristles; tarsi black, with black bristles, which are particu- 

 larly long on the anterior and middle pairs; the front tarsi 

 also bear abundant white pubescence. Wings entirely 

 hyaline, rilled, and with the costal margin slightly inflated. 

 Female resembles the male, but differs in having the 

 moustache black and w^hite, instead of black and j^ellow, 

 the reddish colour of the knees slightly extended on the 

 hind tibia), and wings with costal margin not inflated. 



This species may be distinguished from 0. dimidiafuii 

 by its black, instead of reddish-yellow, legs, and by its 

 more hairy body and legs; from 0. hvis by its hyaline 

 wings. Of the various described mainland species, the 

 only one with which it could be confused is 0. qneenslanrli, 

 Ricardo, from which it is distinguished by the slightly 

 inflated wings in the male, and by the wholly black tibiae. 

 The other mainland species are all very much larger in- 

 sects. 



0. pilosiis occurs sparingly in the bush, where it may be 

 found settled on the dead twigs of small trees. Time of 

 occurrence, January. I have also taken a. specimen at Aid- 

 gate, South Australia. 



Ommatius LEVIS, Sp. nov. 



Thorax, abdomen, and legs black ; wings with basal half 

 hyaline, apical half brown with hyaline hind-margin, and 

 not inflated in either sex. 



Length. Male, 11 mm. 



Hab. Launceston. 



Male. Face black ; moustache of long white hairs, with 

 a few black ones above, two of these being extremely long. 

 Front black. Antennae brownish-black. Thorax black, 

 with a little grey tomentum on shoulders and at sides, the 

 whole covered sparingly with black bristles, which are very 

 short anteriorly, long posteriorly ; scutellum black, fringed 

 with numerous vv^eak white bristles. Abdomen black, with 

 white hairs at sides. Legs black, the tibiae tinged with 

 rusty brown ; femora with white puliescence ; tibia3 with 

 white and black bristles; tarsi with black bristles. Wings 

 with basal half hyaline, apical half brown with hyaline 

 hind-margin ; the wings are rilled but not inflated. 



