1897.] NATURAL SCIENCES OF PHILADELPHIA. 283 



Pepsis purpureus Sm. 



Two specimens. Santarem (February). This also belongs to the 

 group containing sagana, smaragdinula, etc. 



Pepsis elevata Fabr. 



Chapada (April, December); Corumba (April, May); Uacarizal 

 (February). Nine female, ten male specimens. 



Pepsis elongata Lep. 



Santarem. 

 Pepsis pulchripennis Mocs. 



Twenty-four specimens. Chapada (March, April, November, 

 December) ; Santarem. 



Pepsis rubescens Luc. 



Santarem. One specimen. 

 Pepsis ferruginea Lep. 



Santarem. One example which agrees well with the poor descrip- 

 tion of ferruginea. It belongs in the same group as P. marginata. 



Pepsis sinnis Luc. 



One specimen. Corumba (April). 



In addition to the foregoing species of Pepsis, Herr Lucas will 

 shortly describe five new species which form part of this collection. 



F 

 F 

 F 

 F 

 F 

 F 

 F 

 F 

 F 

 F 

 F 

 F 

 F 

 F 

 F 

 F 

 F 

 F 

 F 



Explanation of Plate IV. 



g. 1. Dipogon populator. 



g. 2. Pompilus echinatus. 



g. 3. Pompilus echinatus? var. ? 



g. 4. Pompilus partitus. 



g. 5. Pompilus deceptus $ . 



g. 6. Pompilus vinicolor. 



g. 7. Pompilus argenteo-maculatus. 



g. 8. Pompilus insignitus. 



g. 9. Pompilus singularis. 



g. 10. Pompilus singularis. 



g. 11. Pompilus rhomboideus. 



g. 12. Pompilus scrupulus. 



g. 13. Pompilus ornamentus. 



g. 14. Pompilus annulipes. 



g. 15. Pompilus sulcatus. 



g. 16. Salius pilifrons. 



g. 17. Salius tegularis. 



g. 18. Salius basirufus. 



g. 19. Salius rutilus. 



