CONTENTS VII 



Order Passeriformes — Contiiuicd. 



Familj' Hirundinidae — Continued. Page 



Petrochelidon fulva pallida: Coahuila cliflf swallow 488 



Habits 488 



Progne subis subis: Purple martin 489 



Habits 489 



Distribution 507 



Progne subis hesperia: Western martin 509 



Habits 509 



Progne cryptoleuca: Cuban martin 511 



Habits 511 



Distribution 5 12 



Progne chalybea chalybea: Gray-breasted martin 512 



Habits 512 



Distribution 515 



Literature cited 517 



Index 539 



