the Asllidse of Australasia. 149 



a little below the one which closes the discal cell ; the second 

 and third posterior cells are exactly above the discal and 

 fourth posterior cell. Halteres yellow. 



Aphestia chalyboia, Roder. 



Stett. ent. Zeit. xlii. p. 386 (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 distinguished by the long third joint of 

 antenncB and by the transverse veins closing the discal and 

 fourth posterior cell being in a line. Roder describes his 

 species as black. Face with white moustache and beard. 

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

 rior borders with white 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. 135. 



[nusa, Walker./ 



Dipt. Saund. i. p. 105 (1851). 



A ndretiosujna^ Kond. Dipt. Ital. Prodrome, i. p. 160 (1856). 



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



This genus is distinguished from Laphria by the closed or 

 almost closed first posterior cell of iving. Abdomen more or 

 less bare. 



The only species recorded from Australia is Nusa tectamus, 

 Walker. 



fNusa iectamusJWalker. 



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



Kertesz, Cat. Dipt. p. 195 ILaphria] (1909]. 

 Andrenosoma vidua, Bigot, Ann. iSoc. Ent. France, (5) 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 {Ba7icroft 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 leys. 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. 



