G6 On the A.silido3 of Australia. 



Rhabdotoitamus, Eormed by him for species of Neoitamus with 

 the femora striped or partly yellow. 



Ommatius distinctas, ,( V , sp. n. 



Male (type) in Brit. Mus. Coll. from Townsville, Queens- 

 land (F. '/'. Uodd), L904, 284; another in Mr. Gibbons's 

 Toll. Prom Eidswold, Queensland; another from Kuranda, 

 Queensland (/•'. /'. Dodd), in Mr. Taylor's Coll.; and a. 

 female (I \ pe). 



A species distinguished in the male by the dilated wing 

 ami by the brown spol on apex of wing, which is absent in 

 the female. Moustache black and white. Legs yellowish, 

 with black si i ipes. 



Length, ,( L3-14, ? \\\ mm. 



Male. — Face with a fairly large tubercle, not, however, very 



prominent, covered with whitish tomentum. Moustache 



composed of whitish long bristly hairs and two long black 



bristles above ; in one male there are four of these. Beard 



whitish. Antenna dull brown, the feathered arista twice as 



lone,' as the antenna- themselves. Hind part of head with 



white bristles and while hairs below. Thorax blaekish blue 



with grey tomentum ; two prsesutural bristles, one supraalar 



bristle, and one postalar bristle, nearly all white; the dorso- 



central bristles chiefly white; the dorsum almost hare of 



pubescence, Scutellum the same colouring, with two white 



bristles. Abdomen blackish, with grey tomentum and some 



grey hairs ; sides with longer grey hairs. Genitalia rather 



stent and prominent, black. Legs yellowish red, with black 



stripes on the upper sides of the fore and middle femora, the 



hind pair with the apical half only, black above ; the hind 



tibise black at apex; the last tour joints of all the tarsi 



dusky ; the femora all incrassate, the middle pair with 



noticeable black bristles, the hind pair with four or more 



white ones, the hind and fore pairs with long line white hairs 



below ; the fore tibiae with the same, and the others with 



shorter while pubescence; the bristles en the legs almost 



entirely black. Wings clear, the anterior border very much 



dilated in the middle, the veins coalescing and forming a 



black thick herder ; the brown spot is nl the extreme apex, 



reaching across the anterior branch of the third vein ; the 



small transverse vein is this side of the middle of the diseal 



cell. 



Female seems identical, but the black bristles on moustache 

 are more numerous and those on the thorax are largely black, 

 those on the middle tibiea white. Wings at apex are very 

 faintly grey. 



