TACHINIDAE OF ORIENTAL REGION 77 



bend than to r-m. Humeral callus with a fourth seta set forwards between the 

 outer two setae of the basal row of three . . ALLOTHELAIRA Villeneuve 



Mid tibia with one strong ad seta. Four post dc setae [exceptions occurring as 

 holotype of Actinochaetoptevyx nubifera with only three]. Pleural regions of the 

 thorax with very sparse black hairing (the mesopleuron and sternopleuron exten- 

 sively bare). Notopleuron bare. Eyes relatively smaller and frons and gena not 

 strikingly reduced (vertex much more than half as wide as an eye seen from above 

 and depth of gena usually at least as great as the width of the third antennal 

 segment). Second costal sector very much shorter than the first sector and shorter 

 than m-cu. Bend of vein M forming a gentle evenly rounded curve and m-cu 

 meeting M about midway between r-m and the bend (e.g. as Text-fig. 93). Humeral 

 callus without a fourth seta, with a straight row of three setae (of which the inner- 

 most one sometimes scarcely differentiated) ....... 8 



Three stpl setae. Setulae of vein i? 4+5 extending as far as r-m and usually beyond. 

 Subtriangular sclerotized area immediately below the anterior thoracic spiracle 

 totally bare. Scutellum with the subapical setae very much stronger than either 

 the basal or apical setae, and without preapical discal setae. Infrasquamal hairs 

 absent. Propleural and prostigmatic setae subequal in size 



ACTINOCHAETOPTERYX Townsend 



Two stpl setae. Setulae of vein R i+b confined to the basal node (only about two or 

 three minute hairs). Subtriangular sclerotized area immediately below the anterior 

 thoracic spiracle bearing some long hairs. Scutellum with the subapical setae 

 relatively weak, only slightly larger than the basal setae and not larger than the 

 apical setae, and with a pair of preapical discal setae. Infrasquamal hairs present. 

 Propleural seta much weaker than the prostigmatic seta . THRYPTODEXIA Malloch 

 [This genus is known only from the $ holotype of its type-species and the 

 characters cited might not always hold true when more specimens are known.] 



Head profile conspicuously subtriangular, the profrons prominent and wider than the 

 antenna (Text-fig. 36). Antennae very large, almost reaching the epistome and 

 longer than the horizontal diameter of the eye (Text-fig. 36). Arista bare. Two 

 strong post ia setae, anterior one not far behind the transverse suture. Abdominal 

 Ti + 2 without median discal setae. Bend of vein M moderately strongly 

 angulate but without M 2 appendix. Both sexes with proclinate orbital setae and a 

 pair of outwardly directed prevertical setae. Two stpl setae. Hind tibia with a 

 pd preapical seta ZAMBESA Walker 



Head profile not at all subtriangular, the profrons not prominent and narrower than 

 or equal in width to the antenna (Text-fig. 37). Antennae small, falling short of 

 the epistome and shorter than the horizontal diameter of the eye (Text-fig. 37). 

 Arista plumose. Three post ia setae (first sometimes very weak). Abdominal 

 Ti + 2 with a pair of strong median discal setae (in addition to the marginal pair). 

 Bend of vein M strongly angulate and with an M 2 appendix, q* without and $ with 

 proclinate orbital and prevertical setae. Usually three stpl setae. Hind tibia 

 without a pd preapical seta ....... TOROCCA Walker 



Tribe MICROPHTHALMINI 



(Dexiosomatini) 



Mesnil (19736 : 1231) has defined this group very recently and its characteristics 

 need not be restated here. Strictly speaking, on grounds of priority, the tribe 

 should be known as Dexiosomatini, because Mesnil's (1939a : 53) proposal of the 

 name Dexiosomina (based on Dexiosoma Rondani) pre-dates his proposal (Mesnil, 



