ART. 11 FLIES OF THE GENUS SPATHIMEIGENIA ALDEICH 3 



KET8 TO SPECIES OF SPATHIMB3GENIA 



MALES 



1. Scutellum without the usual pair of slender, upturned, apical 



bristles (British Columbia) buckelli Curran. 



Scutellum with slender, upturned apicals 2. 



2. Purafacial between eye and suture at least twice as wide as 



third antennal joint 3. 



Parafacial decidedly less than twice as wide as third antennal 

 joint 4. 



3. Claws and pulvilli short (Kansas) bridwelli, new species. 



Claws and pulvilli long (Massachusetts, Indiana, Florida). 



hylotomae Coquillett. 



4. Claws and pulvilli short; apical cross vein not very oblique 



(Texas) texensis, new species. 



Claws and pulvilli long; apical cross vein quite oblique 5. 



5. Parafacial narrower than the widest part of third antennal joint 



(Quebec) aurifrons Curran. 



Parafacial wider than third antennal joint 6. 



6. Calypters pale yellow or ivory white, opaque (Michigan). 



erecta, new species. 

 Calypters dark and translucent in middle, hind edge yellow 7_ 



7. Abdomen black to tip ; palpi a little longer than thii-d antennal 



joint (Mexico) obscura, new species. 



Fourth abdominal segment red or reddish at tip ; palpi a little 



shorter than third antennal joint 8. 



8. Legs black ; facial ridges bristly about halfway from vibrissae ; 



parafacial hairs numerous and rather long (Michoacan, 



Mexico) mexicana, new species. 



Legs usually red or reddish ; facial ridges less bristly ; hairs of 

 parafacials less numerous (Northeastern United States; 

 Texas spinigera Townsend. 



FEMALES 



1. Front with yellow or golden pollen 2. 



Front with cinereous or silvery pollen 4. 



2. Fourth abdominal segment wholly black aurifrons Curran. 



Fourth abdominal segment red at apex 3. 



3. Legs usually red or reddish ; posterior orbit with whitish or sil- 



very pollen spinigera Townsend. 



Legs black; posterior orbit with golden pollen mexicana, new species. 



4. Intermediate abdominal segments with discal bristles, small but 



distinct hylotomae Coquillett. 



Abdomen without discals 5. 



5. Tip of third antennal joint distinctly produced upward (Massa- 



chusetts) nigriventris Smith. 



Tip of antennal joint not so produced (Mexico) albopicta Bigot, 



