Plate 1 



Fig. 1. Stizus ruficomis (Fabricius). Head, front view. 



2. Stizus texanus Cresson. Wings. 



3. Bemhioinus tridens (Fabricius). Head, front view. 



4. Bembicinus godmani (Cameron). Wings. 



5. Sti^oides tridentatus (Fabricius). Head, front view. 



6. Stisoides tridentatus (Fabricius). Wings. 



7. Steniolia duplicata Provancher. Head, front view. 



8. Steniolia duplicata Provancher. Wings. 



9. Microhemhex monodonta Say. Head, front view. 

 10. Microbembex monodonta Say. Wings. 



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