286 



THOMAS SAY FOUNDATION 



LIST OF THE SPECIES HEREIN TREATED 



arranged under the subgenera heretofore proposed in so far as we 

 have been able to recognize such groups. To these we have added 

 a few new names for equivalent groups, all of them alike based on 

 very small differences, and of little or no taxonomic importance. 



Family PTERONARCIDAE 



1. Genus Pteronarcys Newman 

 Subgenus Pteronarcys 



1 . P. dorsata Say 



regal is Newman 



2. P. vol/ His Hagen 



pictetii Hagen 



3. P. calif omica Newport 



4. P. prince ps Banks 

 Subgenus Allonarcys (nov.) 



5. P. proteus Newman 



spinosa Banks 



6. P. biloba Newman 



bicarinatus Provaneher 



7. P. comstocki Smith 



proteus New-man ( 9 ) 



2. Genus Pteronarcella Banks 



8. P. regularis Hagen 



9. P. badia Hagen 



torosa Smith 

 triloba Smith 



Family PERLIDAE 



3. Genus Perlodes Banks 



Dictyopteryx Pictet 

 Subgenus Perlodes Banks 



Protarcys Klapalek 

 Megarcys Klapalek 

 Arcynopteryx Klap. 

 20. P.dolobrata Smith 



11. P. bradleyi Smith 



12. P. tibialis Banks 



13. P. signata Hagen 



14. P. yosemite, new species 



15. P. irregularis Banks 



16. P. slossonae Banks 



inornata Smith 



1 7. P. lineata Smith 



18. P. americana Klapalek 



19. P. aurea Smith 



20. P. ignota Smith 



21. P. minor Klapalek 

 Subgenus Perlinodes (nov.) 



22. P. vagans Smith 



4. Genus Isogenus Newman 



Nephelion Pictet 



23. 7. frontalis Newman 



sulcata Provaneher 

 titusi Banks 

 incest a Banks 



24. 7. elongatus Hagen 



25. 7. coin. lirinus Hagen 



5. Genus Perla Geoffroy 

 Subgenus Hemimelaena 



Klapalek 



26. P.innubilii, new species 



27. P. alameda, new species 



28. P. crosbyi, new species 



29. P. expansa Banks 



30. P. postica Walker 



31. P. various Walsh 



32. P. hastata Banks 



33. P. fugitans, new r species 



34. P. nona, new species 



35. P. aestivalis, new species 



36. P. modesta Banks 



37. P. vi rticalis Banks 



isolata Banks 



38. P. tincta, new species 



39. P. sorpta, new species 



40. P. phalerata Smith 



41. P. obscura, new species 



42. P. venosa, new species 

 Subgenus Diploperla (nov.) 



43. 7'. duplicate/, Banks 



41. 7'. bilobata, new species 

 Subgenus Neophasganophora 

 Lestage. 

 Phasganophora 



Klapalek 



45. P. capitata Pictet 



tristis Hagen 

 annulipes Hagen 

 flavescens Walsh 

 hieroglyphica 



Provaneher 

 marginipes Provaneher 

 americana Banks 

 illustris Banks 

 innota Banks 

 Subgenus Perla Geoffroy 



46. 7'. luctuosa Banks 



47. 7'. ramosa, new species 



48. P. kansensis Banks 



49. P. languida, new species 



50. P. sabulosa Banks 

 Subgenus Togoperla Klapalek 



51. V. immarginata Say 



fumosa Banks 

 ~>2. 7'. mi ilia Walker 



6. Genus Alloperla Banks 



53. A. pallid ula Banks 



infirma Banks 



54. A. marginata Banks 



