436 SUss G. RicarJo— .4 Bt vision of 



Cerdistus. Loew. 

 Linn. Y.ut. W. p. 74 (.1849). 



Scbiuer lecordecl tlie one species of tliis genus from 

 Australia; and another species of AValker is added here, so 

 that two species are recorded from this region as follows : — 



Cerdistus maricus. Walker. Dipt. Saund. i. p. 141 {_Asilus'] (1851), et 



List Dipt. vii. Suppl. 3. p. 737 lAsilus^ (ISoo). 

 Cerdistus sYdneyeusis, Schiuer, ' Xovara " Raise, Dipt. p. 187 (1868). 



Cerdistus ma7ucns, "Walker. 



This small species appears to belong to the above genus, 

 but does not answer to the description of Scbiuer^s species. 



Type ( J ) from Port Philip (Hunter) and another female 

 from Queensland (Dr. T. L. Bancroft'). 



Black. Abdomen with grey segmentations. Legs black, 

 the tibiffi and first joint of tarsi obscurely reddish yellow, 

 the hind legs more distinctly so. Moustache black above, 

 white below. TFiuffS hyaliue. 



Length 12 and 14 mm. 



Face blackish, with white tomentum at sides ; in the 

 fresli female the face is more brownish, the tubercle small, 

 the moustache not reaching beyond it, composed of stout 

 black bristles above aud long, soft, white hairs below, in the 

 type the black bristles are not so apparent. Beard white. 

 Antenna black ; the fir?t two joints with black pubescence, 

 the style of the third long. Head deeply excised behind. 

 TTiorax black, with white tomentose stripes aud sides ; two 

 black bristles situated on side at suture, one above the other, 

 and weak yellowish ones behind ; on dorsum short black hairs 

 aud -white ones posteriorly. Scutellum black, with ■whitish 

 tomentum and two weak yellow long bristles. Abdomen 

 black, with whitish-grey segmentations, and with white 

 hairs at the sides ; short black hairs on anterior border of 

 segmentations, and at sides of segmentations a few black 

 hairs. Ovipositor about as long as the last two segments, 

 brown and shining. Legs with black bristles : on the hind 

 tibife a few white ones intermixed ; femora with short white 

 hairs below. Wings hyaline, the small transverse vein 

 beyond the middle of the discal cell ; the fourth posterior 

 and anal cells closed, the former with a short stalk ; veins 

 black. 



Cerdistus sydneyensis, Schiuer. 



Described as black. Abdomen with grev segmentations. 



