XVIII 



TABLE OF CONTENTS. 



5. Regulus calendula calendula (Linna?us) 



6. Regulus calendula grinnelli Palmer 



7. Regulus calendula o1)seurus Ridgway... 

 Genus 3. Polioptila Sclater 



Key to the Species and Subspecies of Polioptila. 



Page. 



705 



709 



710 



710 



713 



optila cperulea cpendea (Linnaeus) 716 



optila casrulea obscura Ridgway 720 



optila cserulea mexicana (Bonaparte) 722 



optila cperulea caesiogastra Ridgway 723 



optila nelsoni Ridgway 724 



optila albiloris Sclater and Salvin 725 



optila l)airdi Ridgway 726 



optila bilineata (Bonaparte) 726 



optila superciliaris superciliaris Lawrence 727 



optila superciliaris magna Ridgway 728 



optila albiventris Lawrence 729 



optila nigriceps Baird 729 



optila plumbea Baird 731 



optila californica Brewster 734 



optila lendjeyei (Gundlach ) 735 



Index 



List of figures illustrating generic details . 



XIX 



