290 THOMAS SAY FOUNDATION 



PLATE 3. 



Appendages of Plecoptera. 



Fig. 1. Acroneuria pacifica Bks., maxilla. 



Fig. 2. Acroneuria pacifica Bks., labium. 



Fig. 3. Acroneuria pacifica Bks., mandible. 



Fig. 4. Acroneuria pacifica Bks., antenna. 



Fig. 5. Acroneuria pacifica Bks., middle leg. 



Fig. 6. Acroneuria pacifica Bks., front foot. 



Fig. 7. Taeniopteryx ruralis Fitch, mandible. 



Fig. 8. Taeniopteryx ruralis Fitch, maxillary palpus. 



Fig. 9. Perla phalerata Smith, portion of tail. 



Fig. 10. I so genus colubrinus Hag., portion of tail. 



Fig. 11. Perla ramosa sp. nov., portion of tail. 

 Drawings by Miss Theresa M. Bobinson. 



