86 R. W. CROSSKEY 



- 3 + 3 or 3 + 4 dc setae. Wing with cell i? 5 not closed before the wing margin, at 



least narrowly open. Distance on vein M from bend to m—cu much less than 

 that from m—cu to r-m (except in one species of Stomatomyia) . Scutellum with 

 a pair of preapical setae. Humeral callus with three or four setae. Eyes bare 

 or haired ............. 3 



2 Abdomen with Ti + 2 excavate to its hind margin. Vein R x setulose. Fore tibia 



with two pv setae. Propleuron bare. Scutellum with strong upwardly directed 

 apical setae. Upper occiput without black setulae behind the postocular row. 

 Abdomen with conspicuous white-pollinose bands on T3 to T5 . CHAETORIA Becker 



— Abdomen with excavation of Ti -f 2 not reaching the hind margin of the tergite. 



Vein R 1 bare. Fore tibia with one pv seta. Propleuron with a few long white 

 hairs [careful examination needed]. Apical scutellar setae almost absent, 

 represented by a pair of fine hairs. Upper occiput with a few fine black setulae 

 behind the postocular row. Abdomen uniformly black and rather shining 



HILLOMYIA Crosskey 



3 3 + 3 dc setae. Last section of vein Cu x (from m-cu to wing margin) very long, 



more than half as long as the penultimate section and very much longer than 

 m-cu; m-cu joining Cu x at an oblique angle. Apical scutellar setae directed 

 very strongly upwards. Costal spine well developed, usually very easily dis- 

 tinguishable from marginal costal setulae and as long as cross-vein r-m or longer . 4 



- 3 + 4 dc setae (except in one unidentified sp. from Northern Territory). Last 



section of vein Ctt 1 normal, shorter than or subequal in length to m-cu and 

 much less than half as long as the penultimate section; m-cu joining Cu 1 approxi- 

 mately at a right-angle. Apical scutellar setae nearly horizontal or directed 

 only slightly upwards (except in some Exorista). Costal spine not developed, 

 indistinguishable from marginal costal setulae ...... 5 



4 Abdomen without discal setae on intermediate tergites (T3 and T4). Palpi well 



developed. $ with upper pair of reclinate orbital setae showing at most only a 

 slight outward twist towards the eyes. Apical scutellar setae weak, very much 

 smaller than the lateral scutellar setae. $ with or without outer vertical setae, 

 if present then obviously weaker than ocellar setae 



STOMATOMYIA Brauer & Bergenstamm 



— Abdomen with two or more very strong erect discal setae on each intermediate 



tergite, accompanied by numerous smaller stiff erect setulae. Palpi absent or 

 almost so (at most represented by a minute papilla bearing a long apical hair) 

 (well developed in an undescribed species). § with the upper pair of reclinate 

 orbital setae enormously strong and directed outwards over the eyes (simulating 

 prevertical setae). Apical scutellar setae extremely strong, almost as large as 

 lateral scutellar setae. $ with very strong outer vertical setae subequal in size 

 to ocellar setae SPOGGOSIA Rondani* 



5 Facial ridges armed with strong downcurved setae on most of their height. Eyes 



densely haired. Robust forms with short inconspicuous M 2 fold extending 



from bend of vein M; hypopygium of <$ never with golden hair ... 6 



- Facial ridges mainly bare, only with weak hairs and setulae immediately above the 



vibrissae which extend at most only for one-third of the height of the facial 

 ridges. Eyes bare or haired. More slender forms with rather narrow tapering 

 abdomen and with a long conspicuous M 2 fold in the wing extending from the 

 bend of M; <J often with dense golden hair on the hypopygium (visible in situ) 



EXORISTA Meigen 



6 3 -f 4 dc setae. Ocellar setae absent or very weak and wiry. Frons and thoracic 



dorsum not golden ........... 7 



— 3 + 3 dc setae (? aberrant). Ocellar setae very strong (much larger than upper pair 



of reclinate orbital setae). Frons and thoracic dorsum conspicuously golden to 

 naked eye ........ Undetermined genus & species 



* See Appendix, p. 209. 



