236 



CALIFORNIA ACADEMY OF SCIENCES. 



of birds "which have as much right to be considered 

 typically Nearctic as Palsearctic:"* 



Corvus, 



Ampelis, 



Loxia, 



Piuicola, 



Linota, 



Passerella. 



Leucosticte, 



10. 

 11. 

 12. 

 13. 

 14. 

 15. 



16. 

 17. 

 18. 

 19. 

 20. 

 21. 

 22. 



Euspiza, 



Plectrophanes, 



Tetro, 



Lagopus, 



Nyctala, 



Archibuteo, 



Haliaeetus. 



Kegulus, 



Certhia, 



Sitta, 



Parus, 



Lophopkanes, 



Lanius, 



Perisoreus, 



Pica, 



Mr. Wallace's list of typical Nearctic genera of land 

 birds consists chiefly of Boreal forms. This is to be ac- 

 counted for by the fact that the Boreal area contains the 

 most primitive Neotropical birds and consequently the 

 most typical genera. The list is as follows: 



Phsenopepla, 33. Empidias, 



Xanthocephalus, 34. Sphyrapicus, 



Scolecophagus, 35. Hylatomus, 



Pipilo, 36. Trochilus, 



Junco, 37. Atthis, 



Melospiza, 38. Ectopistes, 



Spizella, 39. Centrocercus, 



Passerculus, 40. Pediocoetes, 



Pooecetes, 41. Cupidonia, 



Ammodramus, ? Ortyx, 



Cyanospiza, 42. Oreortyx, 



Pyrrhuloxia, 43. Lophortyx, 



Calamospiza, 44. Callipepla, 



Chondestes, 45. Cyrtouyx, 



Centronyx, 46. Meleagris, 



Neocorys, 47. Micratheiie. 



Taking these two lists as a whole, it is surprising what 

 a lack of brilliant and diversified color they present. 

 There are some notable exceptions, to be sure, but they 

 are very few. Regulus is adorned with a coronet of 

 flame or scarlet, Ampelis from the far north displays its 

 beautifully varied, although not gaudy, attire; Sialia 

 tries to appear unassuming in luxurious blue; Oporornis, 



Geographical Distribution of Animals, ii, p. 119. 



