the Asilitlaj of Australasia. 149 



a little beloiv the oue which closes the discal cell ; the second 

 aud third posterior cells are exactly above the discal and 

 fourth posterior cell. Hultcres yellow. 



Aphestia chalijboia, Roder. 



Stett. ent. Zeit. xlii. p. 3^0 (1881). 



The type (a male) was described from Peak Downs, 

 Australia ; no specimen in Brit. Mus. Coll. or Mr. French's 

 Coll. The genus is distinjijuished by the long third joint of 

 antennm and Ijy the transverse veins closing the discal and 

 fourth posterior cell being in a line, lloder describes his 

 •species as black. Fact with white moustache and. beard. 

 Abdomen copper-coloured at base, steel-blue shining on poste- 

 rior borders with w^iite hairs; the remaining segments 

 shining copper-coloured. Legs steel-blue. 



Length 7 lines. 



Dr. Hermann suggests that this species may belong to his 

 new genus Adelodus : see his remark, p. 125. 



NusA, Walker. 



Dipt. Saund. i. p. lOo (IBal). 



Andrenosonia, Kond. Dipt. Ital. Prodrome, i. p. 160 (1856). 



Elacotoma^ A. Costa, Atti R. Accad, Napoli, i. p. 49 (1863). 



This genus is distinguished from Lnphria by the closed or 

 almost closed first posterior cell of iviny. Abdomen more or 

 less bare. 



The only species recorded from Australia is Nusa tectamus, 

 Walker. 



NtLsa tectamus, Walker. 



List Dipt. ii. p. 374 ILcq^hria] (1849), et vii. Suppl. 3, p. 559 (1855) ; 



Kertesz, Cat. Dipt. p. 195 Laphria] (1909J. 

 Andrenosoma vidua, Bigot, Anu. fcioc. Eut. Frauce, (o) viii. p. 228 (1878). 



Type ( ? ) from Port Essington, Arnhem Land, N. Aus- 

 tralia (purchased from Mr. Gould), and a long series of males 

 and females from Queensland {Bancroft and Dodd), and one 

 male from Victoria. Mr. Froggatt records it from Queens- 

 land. 



A large blue-black species with grey pubescence on thorax 

 and base of abdomen and on le(js. Wings clear, the first 

 posterior cell closed at border. 



Length 22-25 mm. 



Male. — Face covered with dirty grey tomentum, silvery 

 white at sides, and with long dirty grey hairs ; the tubercle. 



