TACHINIDAE OF AUSTRALIA 69 



Abdomen with Ti + 2 excavate only on its basal half. Second costal sector haired 

 ventrally. Humeral callus usually with only two strong setae (sometimes a weak 

 third seta set forwards of main two or mesad of inner one of main pair). Slender 

 forms with rather long narrow abdomen ........ 7 



Pteropleuron with a strong pteropleural seta in addition to the hairing. Parafacials 

 bare or at most haired only on upper half. Eyes bare or almost so. Infrasquamal 

 hairs absent. Arista bushy plumose or micropubescent ..... 5 



Pteropleuron without any seta in addition to the hairing. Parafacials fully haired. 

 Eyes haired (hairing very short and sparse in some specimens). Infrasquamal 

 hairs present [careful examination needed]. Arista bushy plumose 



APATEMYIA Macquart 



Propleuron bare. Proboscis short, mentum shorter than eye-height and wider in 

 profile than third antennal segment. Pleural regions of thorax with black hair. 

 Hind tibia of both sexes with two pd setae ....... 6 



Propleuron haired. Proboscis very slender, mentum longer than eye-height and 

 narrower in profile than third atennal segment. Pleural regions of thorax with 

 yellowish white hair. Hind tibia of J with one pd seta (unknown for 9. possibly 

 two pd in this sex) TOXOCNEMIS Macquart 



Parafacials totally bare. Arista with short bushy plumosity or long pubescence. 

 Rows of frontal setae irregular at lower ends where frontal setae form a rather 

 dense bunch on the profrons (especially in £) . $ abdomen with long fine erect or 

 semi-erect hairing. Intermediate abdominal tergites often with erect (rather 

 variable) discal setae ........ Undetermined genus 



[Running out here is a complex of forms with exactly similar appearance in 

 most respects to Toxocnemis (head profile as Text-fig. 43) but differing by the 

 characters shown in the key, most notably by having the propleuron bare. This 

 complex will either require a new genus or will need to be placed in Toxocnemis on 

 a redefined basis] 



Parafacials haired on upper half or at least with a few hairs immediately below the 

 lowest frontal seta. Arista micropubescent (appearing almost bare at first glance). 

 Frontal setae in one regular row on each side, not duplicated into a bunch of setae 

 on the profrons. <$ abdomen with short recumbent hair. Intermediate abdominal 

 tergites without discal setae . . . RHINOMYOBIA Brauer & Bergenstamm 



Wing vein R i+5 completely bare. Proboscis short, mentum much shorter than 

 eye-height. Hind tibia without pv apical seta. Vibrissae level with epistomal 

 margin. Fore tibia without pd setae. Hind tibia with one pd seta Undetermined genus 



[Running out here is an unidentified species seen from A.C.T. that cannot be 

 satisfactorily assigned to a genus at present. The species is congeneric with 

 ' Rhinomyiobia' minuta Bezzi from Fiji.] 



Wing vein i? 4+5 with several setulae on basal node and usually for some distance 

 along the vein towards r-m. Proboscis long and very slender, mentum longer 

 than height of the head. Hind tibia with a small pv apical seta. Vibrissae 

 distinctly above level of epistomal margin. Fore tibia with some small pd setae 

 or setulae distinct from the hairing. Hind tibia with two or more small pd 



setae SIPHOLESKIA Townsend 



Prosternum bare. Arista micropubescent. Eyes haired (hairing very short and 

 inconspicuous in $). Abdominal T5 with a transverse discal row of very strong 

 setae in addition to the apical row. Humeral callus with the three main setae 

 distinctly arranged in a triangle ......... 9 



Prosternum setulose. Arista with long plumosity. Eyes bare. Abdominal T5 

 without a discal row of setae, only with apical setae. Humeral callus with the 

 three main setae standing almost in a straight line ..... New genus 



[Running out here are Rhinomyobia transversalis Malloch from Queensland and 

 R. plumifera Bezzi from Fiji, together with some unnamed forms from New 



