Tachinidae. 



75 



As mentioned above I divide the genera of tliis subfamily, 

 according to Villeneuve, in the following groups: 



I. Eutachininae. 



Frontal bristles generally . descending more or less down on 

 the cheeks, one to three uppermost as a rule reclinate, but some- 

 times all crossing in male. An uppermost transverse bristle present 

 in female or in both sexes, or no transverse bristle present. Præ- 

 sutural acrostichals generally three (sometimes not f . inst. Lydella) ; 

 postsutural acrostichals likewise most often three. Two or three 

 posthumeral bristles and a præsutural intraalar bristle nearly always 

 present. Scutellar marginal bristles on each side four or sometimes 

 more, sometimes three, the apical the smaller. Generally fifth ab- 

 dominal segment quite covered with bristles or on apical half. 



Group 1: One to three reclinate upper frontal bristles in both 

 sexes, or sometimes all crossing in male (or in both sexes: Gonia), 

 but no transverse outwards directed bristle (except Lydella angelicae, 

 Phorocera and Baumhaueria): 



Meigenia 



Viviania 



Monochaeta 



Masicera 



Ceromasia 



Lydella 



Erycia 



Exorista 



Phryno 



Nemorilla 



Bavaria 



Tryphera 



Thelymyia 



Phryxe 



Zenillia 



Ptychomyia 



Gaedia 



Phorocera 



Pales 



Parasetigena 



Campylochaeta 



Erynnia 



Arrhinomyia 



Anachaetopsis 



Winthemia 



Carcelia 



Tachina 



Tricholyga 



Gonia 



Baumhaueria 



Histochaeta 



Bhacodineura 



Hehia 



Lydina 



Group 2: Frontal bristles as in Group 1, but in female an upper 

 outwards directed bristle: 



Group 3: Frontal bristles crossing or with reclinate bristles 

 above, and in both sexes an upper outwards directed bristle: 



