TABLE OF CONTENTS. XI 



Genus 22. Rhopoterpe Cabanis 137 



Key to the Species of Rhopoterpe 138 



55. Rhopoterpe stictoptera Salviu 139 



Genus 23. Pittasoma Cassin 110 



Key to the Species and Subspecies of Pittasoma 141 



56. Pittasoma michleri michleri Cassin 1 U 



57. Pittasoma michleri zeledoni Ridgway 112 



Genus 24. GraUaricula Sclater 143 



Key to the Species of GraUaricula 144 



58. GraUaricula costaricensis Lawrence 145 



Genus 25. Grallaria Vieillot 146 



Key to the Subspecies of Grallaria guatimalensis 147 



59. Grallaria guatimalensis guatimalensis Prevost and Des Murs 148 



60. Grallaria guatimalensis princeps (Sclater and Salvin ) 149 



61. Grallaria guatimalensis mexicana (Sclater) 150 



62. Grallaria guatimalensis ochraceiventris Nelson 151 



Genus 26. Ilylopezus Ridgway ] 52 



Key to the Species and Subspecies of Hylopezus ] 53 



63. Ilylopezus dives (Salvin) 154 



64. Hylopezus perspicillatus perspicillatus (Lawrence) 155 



65. Ilylopezus persijicillatus lizauoi (Oherrie) 156 



66. Hylopezus perspicillatus intermedius (Ridgway) 156 



Family Furnariid^ 157 



Key to the Central American Genera of Furnariida- 159 



Genus 1. Sclerurus Swainson 163 



Key to the Species and Subspecies of Sclerurus 104 



1. Sclerurus cauigularis Ridgway 1G6 



2. Sclerurus mexicanus mexicanus Sclater 166 



3. Sclerurus mexicanus puUus Bangs 168 



4. Sclerurus guatemalensis (Hartlaub) ] 69 



Genus 2. Xenops lUiger 170 



Key to the Species of Xenops 172 



5. Xenops genibarbis mexicanus (Sclater) 172 



6. Xenops rutilus heterurus (Cabanis and Heine) 175 



Genus 3. Margarornis Pteichenbach 177 



7. Margarornis rubiginosa Lawrence 178 



Genus 4. Premnoplex Cherrie 180 



Key to the Subspecies of Premnoplex brunnescens 181 



8. Premnoplex brunnescens brunneicauda (Lawrence) 181 



Genus 5. Acrorchilus Ridgway 183 



Key to the Species of Acrorchilus 1 84 



9 . Acrorchilus ery throps rufigenis (Lawrence ) 1 84 



Genus 6. Synallaxis Vieillot 186 



Key to the Species and Subspecies of Synallaxis 1 88 



10. Synallaxis erythrothorax Sclater 189 



11. Synallaxis pudica pudica Sclater 191 



12. Synallaxis pudica nigrifumosa (Lawrence) 192 



13. Synallaxis albescens latitabunda Bangs 194 



14. Synallaxis albescens hypoleuca Ridgway 195 



Genus 7. Pseudocolaptes Reichenbach 190 



Key to the Species of Pseudocolaptes 197 



15. Pseudocolaptes lawrencii Ridgway 1 97 



