TACHINIDAE OF ORIENTAL REGION 149 



basad of the main seta. Apical scutellar setae weak and nearly horizontal, 

 smaller than the lateral setae. Second costal sector haired ventrally. Palpi 

 yellow. Hairing of the eyes rather short and sparse, o* outer vertical setae 

 very weak ........ ZENILLIA Robineau-Desvoidy 



21 Parafacials bare ............ 22 



- Parafacials haired on their entire extent. [Pakistan] . PSEUDALSOMYIA Mesnil 



22 Vein /? x finely haired along its apical half (upper surface only) .... 23 



- Vein R l entirely bare ........... 25 



23 Legs entirely reddish yellow. Basicosta yellow. Humeral callus with a basal 



row of three setae. Hind tibia without a pd preapical seta, at most with a small 



fine setula in this position .......... 24 



- Legs entirely black-brown. Basicosta brown. Humeral callus with only two 



clearly differentiated setae. Hind tibia with a very strong pd preapical seta 



that is larger than the d preapical seta . EURYSTHAEA Robineau-Desvoidy (part) 



24 Facial ridges bare, o* with third antennal segment deeply bifid (Text-fig. 51). 



Scutellum with apical setae moderately strong, horizontal and subparallel (nearly 



as large as lateral setae) D1GLOSSOCERA Wulp 



- Facial ridges setulose on half or two-thirds of their height, q* third antennal 



segment normal. Scutellum with apical setae very weak and hair-like, directed 

 slightly to strongly upwards (much smaller than the lateral setae) 



HAPALIOLOEMUS Baranov 



25 Scutellum without lateral setae. Head with one pair of reclinate orbital setae and 



mid tibia with several very strong ad setae DOLICHOCOLON Brauer & Bergenstamm 



- Scutellum with lateral setae (one or two pairs). Head usually with two or three 



pairs of reclinate orbital setae, if with one then mid tibia with only one (isolated 

 submedian) ad seta ........... 26 



26 Scutellum with the subapical setae unusually reduced and the apical setae greatly 



enlarged, the latter larger than the subapicals and almost as large as the basal 

 setae A TRACTOCEROPS Townsend 



- Scutellar setae normal, subapical setae not unusually reduced and the apical setae 



weak (much smaller than either the subapical or the basal setae) . ... 27 



27 Facial ridges with strong downcurved setae on their whole height and the ridges 



easily visible in profile. Mid tibia with several very strong ad setae. Large 

 forms with the wings conspicuously brown (especially medially) and with some 

 of the abdominal bristling distinctly spiniform ...... 28 



- Facial ridges bare or setose, if with vestiture on much of their height then the 



ridges almost invisible in profile. Mid tibia usually with not more than two 

 well differentiated ad setae (more in Lydellina). Small or medium-sized forms 

 with more or less clear wings (base sometimes yellowish) and usually without 

 spiniform development of the abdominal vestiture ...... 29 



28 Ocellar setae very strong (at least as large as the reclinate orbital setae). Scutellum 



with one pair of lateral setae and with the subapical setae inserted far apart 

 (distance between their bases greater than that between a subapical seta and 

 its corresponding basal seta). Pleural regions of thorax and the genae with 

 pale yellow hair. Abdomen tawny reddish or reddish yellow with a median 

 black mark on T3, and the hind part of T4 and most of T5 blackish brown. Wings 

 with the brown infuscation most intense near the middle, especially anteriorly 



FRONTINA Meigen 



- Ocellar setae absent or represented by fine hairs. Scutellum with two pairs of 



lateral setae and with the subapical setae inserted close together (distance 

 between their bases much less than that between a subapical seta and its corres- 

 ponding basal seta). Pleural and genal hair black (like the rest of the thorax). 

 Abdomen black, T3 and T4 each with a basal fascia of pale yellow pollinosity 



