PLATE IV. 



17. Orphula orizabcr, n. sp. Female — upper view of head and pronotum ; 

 a — 0}-phula tepanicas, Sauss. Female, upper view of head and prono- 

 tum ; b - Orphula olivacea, Morse. Female, upper view of head and 

 pronotum ; c — Orphula speciosas, Scud. Female, upper view of head 

 and pronotum ; d — Orphula decora, n. sp., upper view of head and 

 pronotum. 



18. Alpha occipitalis, Thos. Male ; a --upper view of head and pronotum ; 

 b — sternum. 



19. Phlibostroma qiiailriinaculata, Thos. Female ; a — upper view of head 

 and pronotum ; b — sternum. 



20. Bobpedon nubiluiii, Say. Male ; a — upper view of head and pronotum; 

 b — sternum. 



21. PlectrophorJis viatorius, Sauss., n. i^en. Male ; a — upper view of head 



and pronotum; b — sternum; c — sternum, female. 



