TACHINIDAE OF AUSTRALIA 45 



longer than the third antennal segment. Two or three sternopleural setae. 

 Arista micropubescent to short-plumose. [Mainly moderately or very robust 

 forms with legs not markedly attenuate] ....... 5 



Three sternopleural setae (2 + 1). Second costal sector haired below. Wing 

 with cell i? 5 closed well before the margin and distinctly petiolate (Text-fig. 79). 

 Proboscis very long and slender, length exceeding the height of the head (as in 

 Prosena). Costal spine very strong, at least twice as long as cross-vein r—m 



PROSENINA Malloch 



Two sternopleural setae (1 + 0- Second costal sector bare below. Wing with 

 cell i? 5 open at the margin (Text-fig. 80) (except in Senostoma notatum), sometimes 

 narrowly. Proboscis long or short. Costal spine not very strong or undeveloped, 

 not longer at most than r^ni .......... 3 



Propleuron haired MACROPODEXIA Townsend 



[Apart from the haired propleuron this genus does not differ from Senostoma. 

 The validity of the genus is therefore very doubtful] 



Propleuron bare ............ 4 



Proboscis short and straight, rather stiff, length conspicuously less than height 

 of the head and usually not greater than length of the head at the epistome. 

 Usually two post ia setae (sometimes three, rarely only one). Abdomen with 

 or without discal setae. Outer part of lower calypter sometimes with long hair 

 on the upper surface ....... SENOSTOMA Macquart 



Proboscis very long and slender, slightly flexible and sinuous, length conspicuously 

 greater than height of head. Usually one post ia seta (occasionally two, but in 

 this case anterior one usually very weak). Abdomen always without discal 

 setae on any tergite. Lower calypter always completely bare on its upper 

 surface PROSENA Le Peletier & Serville 



Face with a conspicuous roof-like ridge on almost its entire height. Arista bare 

 or virtually so. Four or more post dc setae, usually four prst dc setae. Scutellum 

 with at least four distinct discal setae (in addition to the marginal setae). Inter- 

 mediate tergites (T3 and T4) with median discal setae, those on T3 sharply 

 distinguished from the very short fine recumbent hairing on either side. Abdomi- 

 nal T5 with strong subequal setae haphazardly arranged over most of its upper 

 surface. [Large and robust forms with length range 1 1-19 mm] ... 6 



Face without a conspicuous ridge on its whole height, at most with a trace of a 

 weak ridge or median swelling on the upper part immediately below the antennal 

 bases. Arista pubescent or plumose (pubescence sometimes very short and 

 inconspicuous). Three or four post dc setae, nearly always three prst dc setae. 

 Scutellum usually without or with two discal setae, occasional specimen with 

 four setae differentiated. Intermediate tergites with or without discal setae. 

 Abdominal T5 with strong setae usually confined to the apical row, if discal 

 setae present then these few and tending to form a transverse discal row. [Length 

 usually less than 11 mm (holotype of Trichostyhim rufipalpe measuring just 

 about 11 mm)] ............ 7 



Propleuron haired. Scutellar margin with several clearly differentiated marginal 



setae in addition to the normal three pairs . . RUTILOTRIXA Townsend 



Propleuron bare. Scutellar margin usually without marginal setae supernumerary 



to the normal three pairs ....... OLA Paramonov 



[The total facies of this genus is so similar to that of Rutilotrixa that it is 

 questionable whether separate generic status is justified, despite the bare 

 propleuron. Head profile as in Text-fig. 29] 



Propleuron haired. Second costal sector bare below. Parafacials bare or haired. 



Two or three sternopleural setae ......... 8 



Propleuron bare. Second costal sector haired below. Parafacials bare. Three 



sternopleural setae ........... 13 



