13 



MILESHNAE. 



7. The eyes hairy, the face not protuberant, the epistoma slightly convex. 



The upper marginal cross-vein recurrent Eumerus. 



The eyes bare, the face protuberant. The upper marginal cross-vein not 

 recurrent 8 . 



8. The hind femora with a series of spines on the under side . . . Xylota. 

 The hind femoia without spines 9. 



9. The epistoma deeply concave and with a very pronounced central knob. 



The marginal cross-vein forming a broken line Criorrhina. 



The epistoma less deeply concave. The marginal cross-veins forming an 

 almost unbroken line Deineches. 



Sub-family CERIOIDINAE. 



Note. — This sub-family contains one genus, Cerioides Rondani, which name 

 was created to take the place of the preoccupied Ccria,, and in the genus threa 

 species have been described from Australia. There are four species in the Macleay 

 Museum, but their respective identities arc not quite certain. 



Cerioides attstralis Macquart is described from Tasmania, but the genus is 

 not represented from that State in recent collections. It is described as having 

 the first joint of the antennae as long a-s the scape, and except in ('. breviscapa 

 the antennae ol those under examination have the first joint shorter. 



Cerioides breviscapa Saunders is represented by one specimen from South 

 Australia and four from New South Wales. The scape, usually very long, is 

 short and practically obsolete in this species. 



Cerioides ornata Saunders has the first segment of the abdomen only slightly 

 constricted; in the other species examined the abdomen is strongly constricted at 

 the base. Two species exhibit this abdominal character, and one of these has a 

 pair of callosities on the second abdominal segment. It was found labelled under 

 Saunders' name, and is represented by specimens from Queensland and New- 

 South Wales . The second species is without these callosities, and is represented 

 from Queensland. 



A further species of Cerioides is represented from Queensland and New 

 South Wales ; the c hief characters consist of a much constricted abdomen with 

 the constricted portion much longer than in C. breviscapa; the cubital vein is 

 deflected and encroaches very deeply into the first posterior cell, but the area 

 within the deflected portion of the cubital vein is hyaline and not brownish like 

 the remainder of the wing above the cubital vein. 



Sub-family CHRYSOTOXINAE. 

 Genus Chrysotoxum Meigen. 



Chrysotoxum bicinctum Linnaeus, known from Europe and North America, 

 was erroneously recorded from Australia by Walker in 1849. 



The species described below as new does not belong to this genus in its 

 restricted sense, but is placed here until its position can be ascertained more satis- 

 factorily. 



Chrysotoxum elongatum sp. nov. 



(PI. 1, figs. 1 and 2.) 



Description. — Male. The head is black and more or less semi-globular, 

 broader than high and broader than the thorax, excavated behind. The eyes are 



