BY ROWLAND E. TURNER. -J, i 



fringed with long hairs, the maxillary palpi have the basal joint 

 veiy short and the three apical joints much elongated, not quite 

 as long and slender as in Aelurus. The division of the galea is 

 obsolete. The labium has a tuft of very long hairs at the apex, 

 and the first joint of the labial palpi is long, swollen at the apex 

 and furnished with a cluster of very long hairs (nearly absent in 

 some Queensland species). The abdomen is subpetiolate and the 

 hypopygium armed, the latter varying much in shape. Labrum 

 small, borne on a long petiole. 



^. Rugose or coarsely punctuied, the head more or less convex, 

 the mandibles simple, the labial palpi four-jointed, the basal joint 

 the longest; maxillae and maxillary palpi very minute, rudi- 

 mentary; pygidium usually simple; tarsal ungues simple in some 

 species, bifid in most. 



Type T. ahdominalis (ruer. 



This genus is amply distinct from Aelurus Klug, with which 

 it was confused by West wood and Smith. Ashmead has perceived 

 the marked differences, but has got into confusion by a wrong 

 identification of T. spiiiolcp, which he erroneously regards as the 

 type of Tachynomyia. T. abdominalis is described in Guerin's 

 w ork before T. sjjinolce, and should therefore be the type of the 

 new genus proposed for the two, which are in my opinion varieties 

 of the same species. Ashmead's genus Pseudaelurus must sink 

 in any case. 



Kty to the Species of Tachynomyia. 



J (J . A. Hypopygium with parallel sides, subcorneal at apex, with 

 a central spine at the apex. 



a. Abdomen bright ferruginous. 



a'~. Scutellum and postscutellum marked with yellow. 



T. abdominalLs Goer. 



b. Thorax and abdomen entirely ferruginous-brown. T. concolor, n.sp. 

 B. Hypopygium with parallel sides, subconical or subtruncaie ai 



the apex, with two small notches on one or both sides of the 



apical spine. 

 a. Second and third abdominal segments ferruginous. 

 a2, Clypeus with a strong median carina. T. iKt-ah'-^ Sm. 



b^. Clypeus without or almost without a carina. T. ruhtUa Sm. 



