28 U. S. NATIONAL MUSEUM BULLETIN 2 09 



6. First flagellar segment much longer than the interocular distance at the level 



of the hind ocelli 5. azteca Cameron 



First flagellar segment equal to or shorter than the interocular distance at 

 the level of the hind oceUi 7 



7. Wings mostly orange 8 



Wings mostly or entirely blackish 15 



8. Apex of forewing entirely dark; occipital carina not reaching the hypostomal 



carina 9 



Apex of forewing whitish hyaline, or at least much paler than the subapical 

 dark band (when this is present) ; occipital carina reaching the hypostomal 

 carina 13 



9. Posterolateral continuation of transverse groove on second sternite lacking 



or only faintly indicated; inner spur of hind tibia about as long as the outer 



spur 8. marginata Palisot 



Posterolateral continuation of transverse groove on second sternite present 

 and deeply incised; inner spur of hind tibia much longer than the outer 

 spur 10 



10. Flagellum with at least the tip of the apical segment orange, frequently 



several or all of its segments orange 3. mildei St&l 



Flagellum entirely blackish 11 



11. Hind femur above with erect and recumbent bristlelike hairs, these most 



noticeable distally; apical dark band on forewing narrow, occupying less 

 than half of the distance from the wing tip to the third intercubital 



vein 4. augustimargiuata Viereck 



Hind femur with at most a few scattered bristlelike hairs; apical dark band 

 on forewing broad, occupying at least half the distance from the wing tip 

 to the third intercubital vein, subspecies of chrysothemis .... 12 



12. Wings bright fiery red 14a. chrysothemis chrysothemis Lucas 



Wings brownish yellow to fulvous red . . . 14b. chrysothemis lucasii Fox 



13. Mesopleural tubercle weak, scarcely evident; fo; owing with a well defined 



subapical dark band which pales marginally to almost whitish hyaline. 



11. thisbe Lucas 

 Mesopleural tubercle strong, elevated to form a blunt tooth; forewing with- 

 out or with only an indistinct subapical dark band, subspecies of pal- 



UDOLIMBATA 14 



14. Wings lemon yellow to yellowish brown. 



12a. pallidolimbata palliclolimbata Lucas 

 Wings fiery red to reddish brown .... 12b. pallidolimbata smithi Hurd 



15. Flagellum blackish; apices of wings whitish hyaline . . 13. mexicana Lucas 

 Flagellum orange; wings entirely dark 2. saphirus Palisot 



1. Pepsis formosa (Say) 



There are two subspecies, with ranges as noted under each. 



la. Pepsis formosa formosa (Say) 



Pompilus formosua Say, 1823, Western Quarterly Reporter of Medical, Surgical, 



and Natural Science, vol. 2, p. 76 (reference not seen; Leconte edition, vol. 



1, pp. 91, 165), $. Type: 9, Arkansas River within 100 miles of Rocky 



Mts. (destroyed). 

 Pepsis nephele Lucas, 1895, Berliner Ent. Zeitschr., vol. 39, p. 739, ? . Type: 9 , 



Texas (Budapest). 



