TACHINIDAE OF ORIENTAL REGION 145 



ting characters between some of his masicerine subgroups (see key in Mesnil, 1953a : 

 295), but these characters appear to be less satisfactory for group definition in 

 the Oriental fauna than they do in the Palaearctic fauna. An example of a genus 

 in which one of these characters breaks down is N ealsomyia , in which typical males 

 have one pair of enormous reclinate orbital setae but females have two pairs (even 

 this difference not being absolute, since occasional males have a weak upper pair 

 additional to the main pair or even two reclinate orbitals on one side of the head 

 and one on the other). Likewise, the apical scutellar setae are not as reliable as 

 they may seem when a large range of forms is considered, because intermediates 

 occur, and specimens of species that typically have one form of orientation may 

 occasionally have apical scutellar setae that it is difficult to categorize as either 

 'horizontal' or 'upwardly-directed'. Nevertheless the character can remain useful 

 for certain genera - for example the apical scutellar setae of Aplumya and Phryxe 

 (though strong in both genera) are obviously very different in their orientation, 

 those of the former being horizontal or almost so and those of the latter being 

 directed almost straight upwards. 



Key to Oriental Genera 



Para facials bare ............ 2 



Parafacials fully haired PSEUDALSOMYIA Mesnil 



Four sternopleural setae .......... 3 



Two or three sternopleural setae ......... 6 



Eyes haired ............. 4 



Eyes bare ............. 5 



Facial ridges bare. Apical scutellar setae horizontal. Second sa seta as large 



as or larger than the pra seta . . . APLOMYA Kobineau-Desvoidy 



Facial ridges setulose on more than half their height. Apical scutellar setae 

 directed upwards or halt-upwards. Second sa seta unusually weak, much 

 smaller than the pra seta . PSEUDOPERICHAETA Brauer & Bergenstamm 



Mid tibia with at least two strong ad setae. Ocellar setae absent. Abdominal 



Ti -f- 2 without median marginal setae ' Alsomyia' anomala Yilleneuve (? genus) 



Mid tibia with one ad seta. Ocellar setae present. Abdominal Ti + 2 with 



median marginal setae .... 'Erycia' takanoi Baranov (? genus) 



[This puzzling species may be more closely allied to Carceliini than Eryciini but 

 may conveniently be run out here.] 

 Second costal sector bare ventrally ........ 7 



Second costal sector haired ventrally . . ZENILLIA Kobineau-Desvoidy 



[This character applies to the single known Oriental species of Zenillia (placed 

 there by Mesnil, 1054c : 326) and must not be taken to apply generally to 

 Zenillia.] 

 Eyes haired ............. 8 



Eyes bare ............. 9 



Abdomen with discal setae on T3 and T4. Mid tibia with several strong ad setae. 



Upper occiput swollen and with black setulae behind the postocular row. Facial 



ridges finely setulose on at least half their height . PHRYXE Kobineau-Desvoidy 



Abdominal T3 and T4 without discal setae. Mid tibia with one ad seta. Upper 



occiput flat and without black setulae behind the postocular row. Facial ridges 



bare NEALSOMYIA Mesnil 



Head with one pair of reclinate orbital setae and rather strongly subtriangular 



