LOCAL AVIFAUNA OF THE GUFAT F.ASIN. 



327 



the narrow ledges or in niches on the face of cliffs, but their nesting-habita 

 are too variable. The same objection might be urged in regard to Tachy- 

 cineta thalassina, since in some localities this species nests in hollow trees, 

 but along our route we found it to be everywhere strictly saxicoline. 



12. Aquatic birds. — This group includes the vast nudtitiule of water- 

 fowl, both waders and swimmers; these iuhaljit cliiefly the valleys, the 

 following being the species which breed in the interior: — 



1. >rEgialitis vociferns. 



2. iEj,'ialitis nivosus. 



3. Stegiiuopiis wilsoni. 



4. Eecurvirostra americana. 



5. Iliuiautopus mexicauus. 

 C. Nuiueiiius longiro.stri.s. 



7. Tringoides inacularius. 



8. Kbyacophilus solitarius. 



9. Triiiga bairdi. 

 10. TriQga miuutilla. 

 IL Ereuuetcs pusillus. 



12. Falciiiellus guarauua. 



13. Falciuellus thalassiiius. 



14. Ardea herodias. 



15. Herodias egretta. 

 IG. Nyctiardea nrevia. 

 17. Botaurus minor. 

 IS. Ardetta exilis. 



19. Eallus virgiuianus. 



20. Porzaua Carolina. 



2L Porzanajamaicensis. ? 



22. Eraiita canadensis. 



23. Anas bosclias. 



24. Ciiauldasmus streperus. 



25. Dafila acuta. 



20. Si)atula d.vpeata. 



27. Querquedula discors. 



28. Querquedula cyauoptera. 



29. Nettion carolineusis. 



30. Mareca americana. 



31. Aix sponsa. 



32. Erismatura rnbida. 



33. Larus califoruicus. 



34. Sterna regia. 



35. Sterna fosteri. 



36. Hydrochelidou lariformis. 



37. Pelccanus erythrorliynchus. 



38. Gracnlus floridanus. 



39. Podiceps occidentalis. 



40. Podiceps cri^status. 



41. Podiceps califoruicus. 



In the preceding lists of the species characterizing special faunal sub- 

 districts of the Great Basin, we have included mainly those which are 

 common to the entire breadth of the Province. Other species, which might 

 properly be assigned to these lists with respect to their habitats, are 

 excluded, from the fact that they belong to only one side or the other of the 

 Basin. The western' series was lost almost immediately after our departure 

 from the Sierra Nevada, very few being found even so far to the eastward of 

 that range as the West Humboldt M.M.ntains. l^ho ..astern series, however, 

 presented itself much more gradually, additional species being met with in 

 each successive high range to the eastward, the first of them appearing on 



