the Asili(l;i' <;/' Aistrahisia. 179 



16. Fiict' faivlv l)iv!i(l, witli tiibevilo nonrlv 



reachiuf.' till" aiiteiiiijp. Fourth positeriur 



cell clo^e^^, in a parallel line or nearly so 



with the vein closing discal cell ...... Bathypogon, Loew. 



Face very narrow, and narrower at an- 



teunio, with a heel-shaped tubercle 



reaching,' nearly to the antenuaj. Fourth 



posterior cell clo,>;ed or narrow, not 



parallel with discal cell Steiiopogon, Loew. 



JO. liliie-hlack shininjr species. Fore and 



middle tibite fringed with hairs Psilozona, g. n. 



(.'auasa, Walk. 



Dipt. Saund. i. p. 100 (l8ol) ; id., List Dipt. pt. vi. Suppl. 2, p. -11)9 

 ( lbo4j ; Schiner, Verb. Zool.-bot. (jes. \Vien, xvi. pp. lJo2, 653, 703 

 (IblJO). 



This •;cmis was formed by Walker for one species from 

 Tasmania, Cultasa rufitliorax, which he later stated was a 

 variety of Dusiji'oyon imlcht'llus, Macq. ; the second species 

 t rom the same locality, which he named Dasypogon venno, 

 liad likewise beeu described previously by ]\Iaequart under 

 Damipofjon. 



The ^euus is allied to BrnchyrrliOjioIa, but easily distin- 

 guished by the hunipijacked tiiora.x. Schinerdid not include 

 It in his table. Walker omitted any mention of the presence 

 of the curved spine on fore tibiae, which is very distinct in 

 the known species, which are small, the thorax bright- 

 cijlourcd, the abdomen blackish, the wings brownish. The 

 anteniue long, the third joint nearly twice as long as the 

 lirst two together. 



The species as yet recorded in the genus are four, c)iily 

 the first two being from Tasmania, the others from Batchiau 

 and Aru Island. 



I'abasa pulchella, Macq., Dipt. E.\ot. Suppl. i. p. l!)0, pi. vii. tig. 9 [Da.y/- 



potjoH] (lti-14). Cabasa rujithorax, Walker, Dipt. Saund. i. p. 100 



(Ibol). 

 Cabasa rubrithorax, Macq., Dipt. E.xot. Suppl. 4, p. 370 {^Dasypogon'] 



(1649). Dasypogon ce?tuo, Walker, List Dipt. ii. p. 3o9 (1849), et 



vi. Suppl. '2, p. 500 (1854). 

 ( "abasa lumesta, \Valker, I'roc. Linn. Soc. London, iii. p. 83 [Dasypogon] 



(1859), el V. p. 277 [Duiiypogoyf^ (18(31). 

 (."abasa glabrata, Walker, Proc. Linn. Soc. London, v. p. 277 [Dasi/pogon] 



(18(;l). 



Cabasa pulchella, Macq. 

 Cabasa rujithorax, Walker. 



Macquart's type is in the Paris Museum, seen by me, 

 12. 4. 11, apparently a female. 



Walker's ty[)e is identical, a female from Tasmania ; 

 others in Brit. Mus. Coll. from Hol)art [J. J. Walker)^ a 



