148 Miss G. Ricardo — A Revision of 



on the posterior pair. Wings hyaline or clouded brown^ 

 small transverse vein just beyond the middle of discal cell. 

 Abdomen blue-black, shining ; in some of the specimens a 

 reddish line at sides is visible ; genital organs in male black, 

 with black pubescence ; in female a circlet of spines at apex 

 of abdomen. 



Length of co-type 12 mm. 



AcNEPHALUMj Macquart. 

 Dipt. Exot. i. (2) p. 167 (1838). 



One species is recorded from Australia. 



A. punctipenne , Macq. Suppl. 5, p. 71 (1854), unknown to 

 me. The type of -^. coon. Walker, from unknown locality, 

 is not to be found in the Brit. Mus. Coll. 



MicRosTYLUM, Macquart. 

 Dipt. Exot. i. (2) p. 142 (1838). 



One species, M. testaceum, Macq. [Dasypogonl Suppl. 1, 

 p. 188 (1844), is recorded from Australia. IJnknown to me, 

 and not in the Paris Museum. 



It is described as testaceous ; the abdomen black, apex 

 testaceous. Ler/s black, the femora testaceous. Wings 

 yellow, the fourth posterior cell closed. 



Length 12 lines. 



Ptiellus, Walker. 



Dipt. Saund. i. p. 110(1851). 



This genus was formed for one species. 



Phellus glaucus, Walker. 



Dipt. Saund. i. p. 110, pi. iv. fig. 6 (1851) ; id., List Dipt. vi. Suppl. 2, 

 p. 503 (1854) J Froggatt, Australian Insects, p. 300, pi. xxviii. fig. 12 

 (1907). 



Type ( ? ) and another from West Australia. Two males 

 from Swan River, W. Australia. Froggatt states that it is 

 found in the interior of W. Australia. 



This genus is not identical with Phoneus, Macq., or 

 Obelophorus, Schiner, as suggested by this latter author, but 

 is prohably nearly related to the latter genus peculiar to 

 Chili, from which it is distinguished by the short stout 

 prolongation on the middle tibite. The face is covered with 

 hairs, i\\Q forehead broad, the ovipositor of female long, the 

 abdomen hairy, the antennee with a long third joint. The 



