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U. S. NATIONAL MUSEUM BULLETIN 2 09 



Ageniella alternata Banks 1946. None of the above have been placed 

 previously in both the genus Ageniella and subgenus Ameragenia. 



This subgenus is the dominant one of the genus in South America 

 and is well represented also in Central America. 



Keys to the Nearctic species of subgenus Ameragenia 



MALES 



(The male of only one Nearctic species (salti) is known ; probably the 

 habitat of tliis species (Florida) and many features in its coloration 

 will easily distinguish it from other Nearctic males.) 



FEMALES 



1. Face and clypeus fulvous; fore wing uniformly hyaline; habitat: Florida. 



3. salti (Banks) 



Face and clypeus black; forewing hyaline, banded with fuscous; habitat: 



Mexico and southern Texas 2 



2. Femora and scape black 1. striga, new species 



Femora rufous; scape fulvous 2. fascia ta, new species 



Figure 126. — Locality for Ageniella striga. 

 1. Ageniella (^Ameragenia) striga, new species 



Male: Unknown. 



Female: Forewing 4.7 mm. long; apical hairless margin of clypeus 

 narrow, separated from the rest of the clypeus by a distinct furrow; 

 tibial bristles a little sparser and shorter than usual for the subgenus ; 

 long erect hair on propodeum a little sparser than usual for the sub- 

 genus. 



