TACHINIDAE OF ORIENTAL REGION 21 



third antennal segment. Vibrissae very weak or hair-like, not meeting at their 

 apices. Parafacials of varied width but distinctly visible in profile. Pteropleural 

 seta absent. $ ovipositor forming a pointed, sometimes slightly hook-like, piercer 

 that is fully visible when the abdomen is seen in profile ..... 5 



Eyes widely separated in both sexes, lateral margins of the frons only slightly con- 

 tracting towards the vertex, the interfrontal area at least nearly twice the width of 

 the third antennal segment. Antennae moderately large (Text-fig. 22), third 

 segment more than twice as long as second segment and falling short of epistomal 

 margin by much less than its own length . . BESSERIOIDES Curran 



Eyes approximated in both sexes, lateral margins of the frons abruptly and strongly 

 contracting towards the vertex. Antennae small, third segment conspicuously less 

 than twice as long as second segment and falling short of epistomal margin by a 

 distance at least as great as its own length (Text-fig. 23) [antennae missing in A. 

 godjreyi holotype] ..... ALOPHORA Robineau-Desvoidy 



Abdomen long and narrow, almost twice the length of the thorax, with subparallel 

 sides and with the intermediate tergites not more than about twice as wide as their 

 length. Frons in facial view with its upper margins only very slightly bowing 

 inwards, breadth of the frons at its narrowest point about equal to the length of 

 the antenna. Dorsum of the thorax with two large transverse bands of yellow or 

 deep golden pollinosity (the bands occupying the posterior halves of the prescutum 

 and scu.um) PENTATOMOPHAGA de Meijere 



Abdomen shorter and broader, very much less than twice as long as the thorax, with 

 the sides slightly to very strongly convex and with the intermediate tergites very 

 much more than twice as wide as their length (abdomen sometimes nearly sub- 

 circular). Frons in facial view with the upper margins strongly 'pinched in' 

 towards each other, the breadth of the frons at its narrowest point less than the 

 length of the antenna. Dorsum of thorax unicolorous or with very narrow and 

 inconspicuous pale pollinose fasciae ........ 7 



Lower calypter enormously enlarged, especially in <J, forming a kidney-shaped lobe 

 that is very conspicuous to the naked eye (Text-fig. 147). Eye greatly enlarged 

 and gena correspondingly reduced, gena very much narrower than length of the 

 third antennal segment and lowermost point of the eye far below the epistomal 

 axis. Vein M with the bend forming a very slight widely obtuse curve (Text-fig. 

 86). Prescutum with a narrow band of yellow pollinosity against its hind margin 

 (traces of a similar band sometimes present also at the hind margin of the scutum) 



COMPSOPTESIS Villeneuve 



Lower calypter of normal form. Eye not occupying almost the whole side of the 

 head, genal depth about equal to the length of the third antennal segment and 

 lowermost point of the eye at or above the epistomal axis. Vein M with a sharply 

 angled bend. Dorsum of thorax more or less unicolorous, usually evenly covered 

 with yellow pollinosity. [Wings either uniformly brown or extensively but ir- 

 regularly darkened] ECTOPHASIA Townsend 



Key to Oriental Subgenera of ALOPHORA 



Head dichoptic, the interfrontal area well developed and separating the parafrontals. 

 Lower parts of parafrontals and upper parts of parafacials finely and closely 

 haired. Wing with petiole much shorter than m-cu and less than twice as long as 

 r-m (Text-fig. 89). [Large species, length more than 10 mm, with brown-variegated 

 wings, orange scutellum and abdomen, and dense yellow or deep golden hairing on 

 the sides of the thorax and on the humeral and postalar calli] 



subgenus ALOPHORA Robineau-Desvoidy 



Head holoptic or nearly so, the interfrontal area mainly obliterated by meeting of the 



