288 REVISIOX OP GENERA BKLOXlilXli TO DIPTERA BRACIITCERA OF AUSTRALIA, 



4. Antennae with a conspicuous fourth joint P/iellus ; Psilosona 



Antennae with only three joints and a spine (the fifth I 



Bathypogon ; Deroiiiyia 



5. Antennae with the fourth joint present 



Antennae with three joints and a small or minute spine 7 



6 Anterior tibiae with an apical Spur Eryiliropogon ; Saropogon 



Anterior tibiae without a spur .. .. Neodioctria ; Stenopogov ; Crypiopogcn 



7. Anterior tibiae with an apical spur Neosaropogoti ; Neocyrtopogon ; 



Cabasa ; Brachyyrlwpala 

 Anterior tibiae without a spur Coditla 



A (lefiiiition of the genus Rachiopogon cannot be given lieie. The typical 

 species is represented in the collection of the Agricultural Department of Queens- 

 land but, unfortunately, it was examined before the study of the antennae was 

 made and the species is not available at the time of writing this paper. 



The genera Acnephalwm and Microstylum have not been recognised in the 

 collections examined. They should belong to the Phellus-Bathypogon group. 



The antennae of the genus Damalis have a terminal arista, a character wbicJi 

 has not been recognised in the Australian species. 



According to Lundbeck (1908) the genus Dasi/pogon has a tibial spur, a 

 one- or indistinctly two-jointed style with a bristle-shaped apex, and the pos- 

 terior cells all open. It has not been recognised in the Australian collections. 



The characters of the genus Selidopngoii are unknown to me. 



Genus Chrysopogon Ruder. (Text-fig. 4). 



Type, C. crabroniformis Roder. Queensland. 



Characters. — The antennae have the third joint elongate and about as wide 

 as the preceding joints; the fourth joint is conspicuous. There are a pair of 

 strong thoracic spines, one placed on each side of the thorax a little above the 

 wings. The anterior tibiae contain an apical spur. 



Genus O p .s ecs tle n g i .s White. (Text-fig-s. 1-3). 



Type, O. insig)tis Wliite. Western Australia. 



Characters. — The antennae have the third joint short, compressed, broader 

 than the preceding ones and contain a strongly developed apical sj^ine which re- 

 presents the fifth joint. There is a pair of strong thoracic spines, one placed 

 on each side of the thorax a little .above the wings. The anterior tibiae contain 

 an apical spur. 



Notes. — The face is not concave as stated by White, but uornuil and similar 

 to the faces of species placed in the genus Chrysopogon. The moustache is 

 confined to the oral margin and consists of a row of parallel, long and strong 

 bristly hairs placed so close together that they jiractically touch one another. 



These characters are described from the holotype of the typical species from 

 ■which also the Text-figures were drawn. 



Genus PiiELLU s Walker. (Text-fig. 5). 



Type, P. glauciuf Walker. Western Australia. 



Characters. — The third joint of tliB antenn.ne is cylindrical and a.s slender 

 a.s the basal joints; tlie fourth joint is long. The anterior tibiae are witliout a 

 spur. The wings have the fourth posterior cell closed considerably before the 

 wing margin. 



