62 R. W. CROSSKEY 



differences that could fairly be interpreted as of generic significance, but it is outside 

 the scope of this work, to consider this further at present (as Hyleorus has priority 

 and will stand as the valid name in any case) and definite synonymy is not established 

 at present. 



The main characteristics of the Voriini are as follows. Head not noticeably sexually- 

 dimorphic, both sexes with outer vertical setae and proclinate orbital setae ; eyes bare or haired ; 

 ocellar setae divaricate-proclinate or absent; inner vertical setae subparallel; facial ridges 

 bare, or weakly setose for half their height; parafacials usually with hairs or strong down- 

 curved setae on part of their height, sometimes bare; face rather flat, epistome not projecting 

 (invisible in profile); vibrissae level with epistomal margin; upper occiput without black 

 setulae; antennal axis about level with or slightly above eye middle; proboscis short, palpi 

 well developed; antennae often with second segment unusually long in relation to third, arista 

 thickened on at least half its length, often with second basal segment very elongate ; prosternum 

 bare or haired, prosternal membrane bare, propleuron bare (haired in a few rare exceptions) ; 

 humeral callus with two strong setae and usually a third smaller seta mesad of main two and 

 one small seta set forwards; mesonotal chaetotaxy typically as Text-fig. 59; 1 + 3 ia setae; 

 2 or 3 + 3 dc setae (very rarely four post dc); pre-alar seta very small; three sternopleural 

 setae (very rarely only two) ; pteropleural seta either absent or enormously strong; infrasquamal 

 hairs present or absent; scutellum with three pairs of strong marginal setae (basals, widely 

 spaced subapicals and crossed horizontal apicals), and nearly always with a pair of long strong 

 stiff erect preapical setae immediately above the apicals (sometimes some additional long 

 stiff erect setae further forwards on the disc of the scutellum in addition) ; fore coxae usually 

 haired on most of its inner anterior surface; fore tibia typically with a series of definite ad 

 setae or setulae along its length; mid tibia with a v seta; hind coxa bare posterodorsally; hind 

 tibia with or without small pv apical seta and with two d preapicals ; wing extensively setulose 

 dorsally on the veins (R i+i setulose on much of its length, R x and Cu x also often setulose); 

 bend of vein M strongly angulate and remote from wing margin, M continued towards the 

 wing margin by a long or often very long M 3 spur vein or by a darkened fold (Text-figs 82-84) I 

 last section of vein Cu t much longer than m—cu and nearly as long as or even longer than 

 penultimate section; M x and m-cu usually exceptionally oblique (some New Zealand forms 

 with m-cu non-oblique) ; cell i? 5 usually open at wing margin, sometimes closed in margin 

 or long-petiolate ; second costal sector short or very short, bare or haired ventrally; abdominal 

 Ti + 2 excavate to its hind margin or almost so; sternites concealed; g hypopygium with 

 exceedingly long slender curled aedeagus. 



Key to Australian Genera of Voriini 



Parafacial bare, without either hairs or strong downcurved setae. Arista thickened 

 on more than half its length, second aristal segment at least twice and usually 

 more than twice as long as its greatest breadth ...... 2 



Parafacial with a very strong downcurved seta inserted at the upper end immediately 

 below the lowermost frontal seta (Text-fig. 37). Arista thickened only on its 

 basal half, second aristal segment not longer than wide or only inconspicuously so 



VORIA Robineau-Desvoidy 



Prosternum haired (sometimes only a single hair on each side). Eyes obviously 

 hairy. M 2 spur vein exceedingly long, usually much longer than the section of 

 vein M between m—cu and the bend (Text-fig. 84) [slightly shorter in an unde- 

 scribed species from Philippines]. Both intermediate abdominal tergites with 

 erect discal setae. Facial ridges setulose on half their height (in profile no gap 

 between the uppermost setula on the facial ridge and the lowermost frontal seta) 



HYLEORUS Aldrich 



