136 R. W. CROSSKEY 



3 Parafacials bare. Second costal sector bare ventrally . . ANEOGMENA-group 



- Parafacials fully haired. Second costal sector haired ventrally . BUQUETIA-group 



4 Two presutural dc setae (i.e. 2 + 4 dc). Cell R b very long-petiolate (petiole at least 



three times as long as r-m). Frontal setae conspicuously reclinate CESTONIA -group 



- Three presutural dc setae (i.e. 3 + 4 dc). Cell R b not petiolate (except short petiole 



in Prosopodopsis appendiculata which is not longer than r-m). Frontal setae not 

 obviously reclinate (except in Elodia) ........ 5 



5 Humeral callus with the three main setae standing in a triangle. Eyes densely 



haired PHEBELLI A-group 



- Humeral callus with the three main setae standing in a straight line or with the 



middle one set only slightly forwards (a few forms with only two clearly dif- 

 ferentiated humerals). Eyes haired or bare ....... 6 



6 Wing with the bend of vein M forming a gentle evenly rounded curve, the bend 



usually about equidistant between m-cn and the apex of M, or nearer to the 

 latter. Wings typically shorter and broader than usual and with unusually wide 

 cell Sc (e.g. as Text-fig. 105). Mid tibia always with one ad seta 



ER YTHROCERA group 



- Wing with the bend of vein A/ moderately or strongly abrupt (slightly rounded in 



a few forms, e.g. Scaphimyia), the bend typically closer to m-cu than to the 

 apex of M x . Wings normal, always with the usual rather narrow cell Sc. Mid 

 tibial ad setae varied, one or more than one ....... 7 



7 Facial ridges with very strong downcurved setae on most of their height, the ridges 



themselves usually conspicuously visible in profile . . . FRONTINA-group 



- Facial ridges without such strong regular downcurved setae, either bare or rather 



weakly setulose, if setulae present then usually not reaching more than about 

 half or two-thirds up the ridges, the ridges themselves usually not visible or only 

 slightly so in profile APLOMYA PHRYXE-group 



DIA TRAEOPHAGA-gvoup 



Head shape abnormal, strongly triangular in profile with the frons nearly horizontal and 

 the profrons very much wider than the gena (Text-fig. 54). Eyes bare. Facial ridges bare. 

 Parafacials bare. Frontal setae not reclinate. One pair of reclinate orbital setae. Upper 

 occiput swollen, with black setulae behind the postocular row. <-J with or without proclinate 

 orbital setae. Arista thickened on most of its length, with second segment elongate (Text-fig. 

 54). Humeral callus with 2(3) setae in line. 2 + 4 or 3 -f- 4 dc setae. 2 or 3 stpl setae. 

 Cell R b open or petiolate. Bend of vein M sharply angulate (Text-fig. 106). Second costal 

 sector bare ventrally. Mid tibia with one ad seta (rarely small additional setula basad of 

 main one). 



Included genera. Diatraeophaga Townsend and Metoposisyrops Townsend. Also 

 included in this group is the Neotropical genus M etagonistylum Townsend. It 

 should be noted that Townsend (in Manual of Myiology) has these three very obviously 

 closely related genera in three widely separated tribes, placing M etagonistylum 

 in the Germariini, Diatraeophaga in the Hyperecteinini, and Metoposisyrops in a 

 tribe of its own, the Metoposisyropsini. The group as a whole is certainly very 

 distinctive among the Eryciini, and indeed amongst the Goniinae as a whole, and 

 recognition as a named subtribe or even tribe might be justified; if the group is 

 later to be given recognition as a named entity then the family-group name Meto- 

 posisyropsini Townsend (19366 : 105) is available for it. 



