VI CONTENTS. 



Genus Chordeiles — Continued. 



Chordeilea virginianus — Continued. Page. 



Chordeiles virginianus howelli 57 



Chordeiles virginianus henryi 65 



Chordeiles virginianus aserriensis 71 



Chordeiles virginianus chapmani 75 



Chordeiles virginianus vicinus 80 



Chordeiles virginianus minor 82 



Table of comparative measurements 86 



Chordeiles acutipennis 87 



Synonymy 87 



Specific characters (adult male) 87 



Adult female 87 



First autumn plumage 87 



Juvenal plumage 88 



Nestling plumage 88 



Seasonal variation 88 



Molt 88 



Individual variation 88 



Geographical variation 89 



Geographical distribution 90 



Zonal distribution 91 



Phylogeny 91 



Migi-ation 92 



Habits 92 



History 93 



Chordeiles acutipennis acutipennis 94 



Chordeiles acutipennis exilis 98 



Chordeiles acutipennis micromeris 100 



Chordeiles acutipennis texensis 103 



Chordeiles acutipennis inferior 109 



Table of comparative measurements 112 



Chordeiles rupestris 113 



Synonymy 113 



Specific characters (adult male) 113 



Adult female 113 



Remarks 113 



Geographical distribution 113 



Habits 114 



Phylogeny 114 



History 114 



Chordeiles rupestris rupestris 114 



Chordeiles rupestris xyostictus 116 



Chordeiles rupestris zaleucus 118 



Index 121 



