
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 = hated below: “Wing 
with cell RF, 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 y—m 
PROSENINA Malloch 
Two sternopleural setae (1 + 1). Second costal sector bare below. Wing with 
cell R; 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 ym. . = : : 3 
Propleuron haired . : : : MACROPODEXIA Pownsend 
[Apart from the haired proplearos 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 hat 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 1a seta (occasionally two, but in 
this case anterior one usually very weak). Abdomen always without discal 
setae on any tergite. Lower » rage always completely bare on its upper 
surface : ‘ PROSENA Le Peletier & Serville 
Face with a conspicuous “root. 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 11-19 mm] : 6 
Face without a conspicuous ridge on its whole height, at most with a ecitte die a 
weak ridge or median swelling on the upper part immediately below the antennal 
bases. Arista pubescent or plumose (pubescence sometimes very short and 
imconspicuous). 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 gee of Tvichostylum rufipalpe measuring just 
about 1rmm)] . 7 
Propleuron haired. Scutellar margin with seven clearly ‘differentiated marginal 
setae in addition to the normal three pairs. : RUTILOTRIXA Townsend 
Propleuron bare. Scutellar margin on without marginal setae supernumerary 
to the normal three pairs. : OLA Paramonov 
[The total facies of this genus is so Sienna to ae oi Rutilotvixa 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 henecel ee Dae eee ee “Thee 
sternopleural setae : - : : : ; : : : : : 13 
