148 R. W. CROSSKEY 



- Parafacials bare. Ocellar setae present. Facial ridges bare or weakly setose 



only on lower half, usually not widely visible in profile. Arista thickened on 

 not more than half its length. Mid tibia either with one or with more than one 

 ad setae ............. 15 



15 Humeral callus with the three main setae standing in a triangle .... 16 



- Humeral callus with the three main setae standing in a straight line . . . 19 



16 Epistome exceptionally strongly projecting, subnasute, very easily visible in 



profile. Hind coxa with some long fine posterodorsal setulae. Palpi very long 

 and spatulate, yellow. Abdomen mainly reddish yellow, only blackish on a median 

 triangle on T3, apically on T4 and on most of T5 . RHINAPLOMYIA Mesnil 



- Epistome normal, not prominently produced, almost invisible in profile. Hind 



coxa bare on the posterodorsal surface. Palpi normal, or if long spatulate then 

 colour blackish. Three stpl setae (except in seniorwhitei with two). Abdominal 

 ground colour varied ........... 1 7 



17 Mid tibia with two or more ad setae. Abdomen with discal setae on T3, T4 and 



T5. Palpi black or blackish brown. Nondescript forms with whitish or greyish 

 pollinosity and blackish or dark reddish abdominal ground colour. Calyptrae 

 white ............. 18 



- Mid tibia with one ad seta. Abdomen without discal setae differentiated from the 



general erect hairing on any tergite. Palpi yellow. Large colourful form with 

 thick bright golden pollinosity on head and thoracic and abdominal dorsum, 

 abdomen with tawny orange ground colour and trace of a dark median vitta to 

 naked eye. Calyptrae yellow ' Aplotnyia' carceliaejormis Villeneuve (? genus) 



[Mesnil (1955 : 459) placed this species in Phebellia but such an assignment 



seems questionable.] 



18 Abdominal T3 with foiir median marginal setae. Three stpl setae. Facial ridges 



almost invisible in profile and bare (except for a very few hairs immediately 

 above vibrissae) ....... PHEBELLIA Robineau-Desvoidy 



- Abdominal T3 with two median marginal setae. Two stpl setae. Facial ridges 



widely visible in profile and finely setulose on lower two-fifths 



'Exorista' seniorwhitei Baranov 

 [Generic position of this species is problematical. Only the holotype and 

 paratype are known (both q").] 



19 Facial ridges finely setulose on about half their height or more. Abdominal T3 



and T4 with erect median discal setae (sometimes undeveloped on T3 in Zenillia). 

 Upper occiput with black occipital setulae behind the postocular row. Antennal 

 axis obviously above level of eye middle and antennae moderately long (third 

 segment 3-6 times as long as second segment). Antennae and abdomen black 

 or blackish brown in ground colour. Two or three pairs of reclinate orbital setae 

 in both sexes. Scutellum with lateral setae much weaker than basal setae . . 20 



- Facial ridges bare. Abdominal T3 and T4 without discal setae. Upper occiput 



without black setulae behind the postocular row. Antennal axis almost level 

 with eye middle and antennae very short (third segment about twice as long 

 as second segment). Antennae orange on second and part of third segment, 

 abdomen with ground colour extensively reddish yellow anterolaterally. One 

 pair of reclinate orbital setae in o*. two pairs in $ (the pair in $ exceptionally 

 strong and subequal to the inner vertical setae, haphazardly accompanied by 

 very weak second seta in occasional specimen). Scutellum with lateral setae 

 very strong, as large or almost as large as basal setae . NEALSOMYIA Mesnil 



20 Mid tibia with several strong ad setae. Apical scutellar setae very strong and 



directed almost straight upwards, much larger than the lateral setae. Second 

 costal sector bare ventrally. Palpi black. Hairing of the eyes very long and 

 dense, <J outer vertical setae very strong . . PHRYXE Robineau-Desvoidy 



- Mid tibia with one ad seta, sometimes accompanied by a very weak ad setula 



