76 NEW AUSTRALIAN ASILID^, 



longitudinal dark brovv^n line, is edged outwardly on each 

 side with light yellow-brow^n, and is bordered anteriorly on 

 each side by a lengthened irregular patch of very dark 

 blown; shoulder's whitish, with a dark brown spot beneath 

 the shoulder tubercles ; thorax bears white lateral pubes- 

 cence, short black median bristlesi, and long black 

 and yellow lateral and posterior bristles ; scutellum light 

 grey, with two long, black, convergent, terminal bristles. 

 Abdomen with one segment' grey, remainder black, with 

 jjale hindmargins, which, according toi the direction of the 

 light, vary in colour from grey to brown, and are partially 

 interrupted in the middle ; the whole of the dorsum is 

 powdered with brown tomentum, and the sides bear a little 

 vei}' short white pubescence; genitalia somewhat swollen, 

 dark brown, with abundant white pubescence. Legs with 

 femora and tibiae brownish-yellow, the middle and posterior 

 femora with the upper surface black, posterior tibise with 

 apex brown, tarsi brown, the anterior pair with first joint 

 brownish-yellow; femora with a little white pubescence; 

 tibicB with white bristles; tarsi with both white and black 

 bristles. AA^ings hyaline ; marginal cell closed, the radial 

 vein being sharply curved up at its end so as to close the- 

 cell close to the wing-margin; first posterior cell wiae 

 open ; fourth loosterior cell narrowly, and anal cell very 

 narrowly, open ; halteres brown. 



This species in the male, the only sex known, bears an 

 e>rtreme]y close resemblance to the small brown species of 

 the genus RJiahdotnitaiirux : it mav, however, be distin- 

 guished by the different form of the marginal cell, by the 

 open fourth posterior cell, and by the antennae being with- 

 out any arista. 



This interesting species is at present known from a. 

 male taken bv Dr. Ferguson at Orange, N.S.W., on Novem- 

 ber 24, 1914." 



C R Y p T o p o G o N, Gen. nov. 



Wings with three submarginal cells, the upper branch 

 of the cubital fork being connected with the radial vein 

 by a crcss-veinlet ; marginal cell broadly open ; all pos- 

 terior cells open ; anal cell closed ; antennae with a short 

 pointed style ; anterior tibise without a. terminal curved 

 spine ; tarsi with long bristles. 



Fa.ce rather narrow, widening gradually from base of 

 antennae to oral margin ; moustache confined to the oral 

 margin, and consisting of long stiff bristles. Front very 

 wide above, but owing to the converging eyes narrowed to 

 half its breadth at the base of the antennae ; vertex mode- 

 rately excavated, and with a, conspicuous ocellar tubercle.. 



