72 R. W. CROSSKEY 



notopleural seta). Abdominal Ti + 2 with median discal setae (except in P. 

 gibsonomyioides) . Hind tibia with pd preapical seta in addition to the ad and d 

 preapicals (except in P. gibsonomyioides) ........ 2 



- Parafacials bare. Parafacial at mid-height conspicuously narrower than third 



antennal segment. Mid tibia with one ad seta. Fore tibia with one pv seta 

 (? constant). Pre-alar seta very small and inconspicuous (weaker than the posterior 

 notopleural seta). Abdominal Ti + 2 without median discal setae. Hind tibia 



without pd preapical seta METOPOMINTHO Townsend 



2 Abdominal T3, T4 and T5 each with one pair of erect median discal setae on the 

 dorsum. Lower calypter small and rather rounded, widely separated from the 

 scutellum. Costigial seta* very strong, conspicuously larger than the basal 

 scutellar setae, o* head either dichoptic or holoptic, if dichoptic with prevertical 

 setae and proclinate orbital setae like the $. Parafacial hair short or of moderate 

 length, sometimes sparse, the hairs not or hardly at all longer than the antennal 

 width. Two or three post dc setae. Abdomen long and fusiform (body facies 

 resembling Minthoini) ..... PHYLLOMYA Robineau-Desvoidy 



— Abdominal T4 and T5 (to a lesser extent also T3) each with an irregular transverse 



row of many very long fine erect discal setae across the whole dorsum. Lower 

 calypter moderately large and broad, its inner edge close to the scutellum. Costigial 

 seta not very strong, very much shorter than the basal scutellar setae. 5* head 

 holoptic, without prevertical or proclinate orbital setae. Parafacial hair extremely 

 long and abundant, the hairs very much longer than the antennal width. Three 

 post dc setae. Abdomen not distinctly fusiform, if rather elongate then widest in 

 basal half rather than medially (body facies not strongly minthoine) 



GIBSONOMYIA Curran 



Key to Oriental Species of PHYLLOMYA Robineau-Desvoidy 



Three post dc setae. Abdominal Ti + 2 without discal setae. Hind tibia without 

 pd preapical seta. Arista plumose (including plumosity wider than third antennal 

 segment), o* head virtually holoptic (Text-fig. 69), without prevertical and 

 proclinate orbital setae. Abdomen appearing almost uniformly black to naked 

 eye, thin trace of bluish grey pollinosity just visible. [Known from India] 



gibsonomyioides sp. n. 



Two post dc setae. Abdominal Ti + 2 with a pair of erect discal setae. Hind tibia 

 with pd preapical seta. Arista long-pubescent (including pubescence narrower 

 than third antennal segment). <J head widely dichoptic, with prevertical and 

 proclinate orbital setae like the $. Abdomen with three very conspicuous silvery 

 white pollinose fasciae (basally on T3-T5). [Known from southern China and (?) 

 Japan]. .......... elegans Yilleneuve 



Key to Oriental Species of GIBSONOMYIA Curran 



[Note. Key characters cited refer to males. Females are unknown or not positively 

 associated.] 



1 Eyes bare. Palpi reddish yellow. Head with exceptionally prominent profrons and 

 very wide parafacials (the parafacial at mid-height much wider than length of third 

 antennal segment). Antennae very short, third segment about one and a half times 

 as long as second segment. Abdomen shining black, with a faint brassy greenish 

 tinge and almost no trace of pollinosity .... gymnops Villeneuve 



* The costigial seta is an unusually strong bristle on the dorsal surface of the costal base. 



