TACH1NIDAE OF ORIENTAL REGION 89 



Abdomen with a pair of strong median marginal setae on Ti +2 and with a pair of 



strong erect median discal setae on T3 and T4 ...... 6 



Abdomen without median marginal setae on Ti + 2 and without discal setae on T3 



and T 4 PROMINTHO Townsend 



Abdomen without discal setae on T5. Arista pubescent. Scutellum with only one 

 pair of marginal setae (subapicals), basal and apica! setae absent. Bend of vein M 

 forming an evenly rounded curve. Second costal sector haired ventrally. Epi- 

 stomal margin wiirped forwards from the face and just visible in profile in front of 

 the vibnssal insertions (Text-fig. 43) . . MEGISTOGASTROPS1S Townsend 



Abdomen with a pair of strong erect discal setae on T5 (similar to those on T3 and 

 T4). Arista plumose. Scutellum with at least two pairs of marginal setae (small 

 basals or apicals or both present in addition to the subapicals). Bend of vein M 

 sharp, with or without appendix. Second costal sector bare ventrally. Epistomal 

 margin not at all prominent, invisible in profile (Text-fig. 42) 



SUMPIGASTER Macquart 

 [A specimen of this genus seen from New Guinea lacks both basal and apical 

 scutellar setae and its scutellum therefore resembles that of Megistogastropsis. 

 Some African species have the second costal sector haired ventrally.] 



Tribe NEMORAEINI 



In my earlier work (Crosskey, 19736) in which the Nemoraeini were characterized 

 it was stated that this tribe is confined to the Old World. When that work was 

 prepared I did not have available the work of Mesnil (19716), in which he showed 

 that Hypotachina Brauer & Bergenstamm (a genus originally described from South 

 America and the basis of Townsend's tribe Hypotachinini) belongs in the nemoraeines, 

 and I have not seen specimens of H. chrysophora (Wiedemann): this species, the 

 only one known in South America to appertain to the Nemoraeini, is unrepresented 

 in the BMNH collection. It is now clear, however, that the nemoraeines are an 

 almost entirely Old World group, but that at least one species is found in the New 

 World. 



Differing views are held on whether to treat the genus Nemoraea Robineau- 

 Desvoidy in a broad sense, as favoured by van Emden (i960 : 360) and Crosskey 

 (1967c : 97; 19736 : 66), or in a more restricted sense as favoured by Mesnil (19716 : 

 987). The broad approach admits into Nemoraea a variety of species showing a 

 widely differing facies, wholly or partially haired lower calypter, three or four 

 post dc setae, presence or absence of a prst ia seta, and a bare or haired lower surface 

 to the second costal sector. The narrower treatment of Mesnil (as shown by his 

 diagnoses and key characters) admits into Nemoraea only forms in which the lower 

 calypter is entirely haired, there are four post dc setae, a prst ia seta is present, and 

 the second costal sector is bare ventrally. All the forms (other than one species 

 from Burma for which he proposed the genus Echinemoraea) showing other combina- 

 tions of characteristics are placed by Mesnil in Hypotachina - this name then coming 

 into use for a large number of Old World species as well as the single Neotropical 

 species - and this genus is then differentiated from Nemoraea principally by having 

 three post dc setae, the lower calypter mainly bare, no prst ia seta, and the second 

 costal sector haired ventrally. 



