TACHINIDAE OF ORIENTAL REGION 131 



in front of anterior ocellus. Scutellum with one pair of very strong lateral setae. 

 Parafacials totally bare . . . . . ZYGOBOTHRIA Mik (part) 



- Ocellar setae absent or very weak, very much smaller when present than the reclinate 



orbital setae and inserted behind the level of the anterior ocellus. Scutellum 

 with two pairs of lateral setae (one of them weak). Parafacials bare or finely 

 haired on upper parts ........... 18 



18 Parafacials completely bare. Ocellar setae absent. Each side of venter of 



abdominal T4 in the $ with unmodified hair or with a large area of short fine 



hair that is not formed into a definite fascicle . . DRINO Robineau-Desvoidy 



- Parafacials finely haired on upper parts (Text-fig. 60), hair sometimes extending 



on to lower parts, occasionally only a very few minute hairs immediately below 

 lowest frontal setae but parafacials never entirely bare. Ocellar setae present 

 (except in P. laetifica), very weak and wiry. Each side of venter of abdominal 

 T4 in the o* with a definite fascicle of long dense hair (hair-fascicles varying in 

 size from a small inconspicuous tuft to a large area covering the whole half- 

 venter, Text-figs 148-150) PALEXORISTA Townsend 



19 Eyes densely haired (hairing long and conspicuous) ...... 20 



- Eyes bare or with short sparse inconspicuous hairing . . . . . 23 



20 Parafacials bare. Scutellum with lateral setae. Arista normal, thickened only on 



the basal part and with short second segment. Head of normal width, parafacials 

 narrower than the face and less than twice as wide as third antennal segment . 21 



- Parafacials completely haired. Scutellum without lateral setae. Arista thickened 



very strongly on almost all its length and with the second segment greatly 

 elongate. Head unusually wide (Gunia-like), parafacial wider than the face and 

 more than three times as wide as third antennal segment. . TRITAXYS Macquart 



21 Scutellum with two or three pairs of discal (preapical) setae (i.e. supernumerary 



discal setae present in addition to the normal pair) 



TRIXOMORPHA Brauer & Bergenstamm 



- Scutellum with one pair of discal (preapical) setae (as normal) .... 22 



22 Facial ridges with strong downcurved setae on most of their height 



PALES Robineau-Desvoidy 



- Facial ridges bare (except for the usual small setulae immediately above the 



vibrissae) .... SISYROPA Brauer & Bergenstamm (most species) 



23 Subapical scutellar setae exceptionally widely separated, distance between their 



bases much greater than that between a subapical seta and its corresponding 

 basal seta. One pair of lateral scutellar setae. Apical scutellar setae extremely 

 strong, their length almost as great as the length of the scutellum. Four sterno- 

 pleural setae. Sides of fourth abdominal tergite of o* with very long dense 

 hair-fascicles ....... STURMIA Robineau-Desvoidy 



- Subapical scutellar setae not exceptionally widely separated, distance between 



their bases at most only slightly exceeding and usually less than distance between 

 a subapical seta and its corresponding basal seta. Two pairs of lateral scutellar 

 setae (one strong and one weak). Apical scutellar setae almost always very 

 small, their length not more than half the scutellar length (long and strong in 

 Sisyropa stylata but then two pairs of lateral setae). Two to four sternopleural 

 setae. Sides of abdominal T4 in q* with or without hair-fascicles .... 24 



24 Facial ridges weakly setose on the lower half. Humeral callus with three setae of 



which the middle one is set slightly forwards of the others. Two stpl setae. 

 Mid tibia with one ad seta. Ocellar setae absent, o* abdominal T4 with very 

 short fine hairing over most of the venter, but without a definite sexual hair- 

 fascicle PARAPALES Mesnil 



[This genus is known in the Oriental Region only from the holotype of P. 



sturmioides Mesnil from which the foregoing characters are taken. They 



may not all hold true when further specimens are found.] 



