X TABLE OF COKTENTS. 



Page. 



Family Icterid^. The Troupials 169 



Key to the Genera of Icteridse - 173 



Genus 1. Zarhynchus Oberholser 175 



1. Zarhynchus wagleri wagleri (Gray) - . 176 



2. Zarhynchus wagleri mexicanus Eidgway 178 



Genus 2. Gymnostinops Sclater 178 



Key to the Species of Gymnostinops 179 



3. Gymnostinops montezuma (Lesson) 180 



4. Gymnostinops cassini Richmond 181 



5. Gymnostinops guatimozinus (Bonaparte ) 182 



Genus 3. Ostinops Cabanis 183 



6. Ostinops decumanus (Pallas) 184 



Genus 4. Cacicus Lac^pede 186 



Key to the Species of Cacicus - 188 



7. Cacicus vitellinus Lawrence \ 188 



8. Cacicus microrhynchus (Sclater and Salvin) 189 



Genus 5. Cassiculns Swainson 190 



9. Cassiculus melanicterus (Bonaparte) 191 



Genus 6. Amblycerous Cabanis 192 



10. Amblycercus holosericeus (Lichtenstein) 194 



Genus 7. Cassidix Lesson 196 



Key to the Subspecies of Cassidix oryzivora 197 



11. Cassidix oryzivora violea Bangs 197 



12. Cassidix oryzivora mexicana (Lesson) 199 



Genus 8. Callothrus Cassin 200 



Key to the Species and Subspecies of Callothrus 201 



13. Callothrus robustus (Cabanis) 201 



14. Callothrus feneus aeneus ( Wagler) , _ 203 



15. Callothrus seneus assimilis Nelson 204 



Genus 9. Molothrus Swainson , 205 



Key to the Species and Subspecies of Molothrus 207 



16. Molothrus ater ater (Boddaert) 207 



17. Molothrus ater obscurus (Gmelin) 210 



18. Molothrus atronitens (Cabanis) 211 



Genus 10. Quiscalus Vieillot 212 



Key to the Species and Subspecies of Quiscalus ^ 214 



19. Quiscalus quiscula quiscula (Linnceus) 215 



20. Quiscalus quiscula aglreus (Baird ) 217 



21. Quiscalus quiscula a;neus (Ridgway ) 219 



Genus 11. Holoquiscalua Cassin 222 



Key to the Species of Holoquiscalus 224 



22. Holoquiscalus gundlachii ( Cassin) 226 



23. Holoquiscalus jamaicensis (Daudin) 22" 



24. Holoquiscalus niger ( Boddaert) 228 



25. Holoquiscalus brachypterus (Cassin) 228 



26. Holoquiscalus caymanensis (Cory) 229 



27. Holoquiscalus fortirostris (Lawrence) 229 



28. Holoquiscalus inflexirostris (Swainson) 230 



29. Holoquiscalus martinicensis Ridgway 231 



30. Holoquiscalus guadeloupensis ( Lawrence) 232 



31. Holoquiscalus luminosus (Lawrence) 232 



32. Holoquiscalus rectirostris ( Cassin ) 233 



Genus 12. Megaquiscalus Cassin ' 233 



