X TABLE OF CONTEXTS. 



Page. 



Genus 24, Heteroscelus Baird 365 



Key to the Species of Heteroscelus 366 



44. Heteroscelus incanus (Gmelin) 367 



Genus 25. Actitis Illiger 371 



Key to the Species of Actitis 372 



45. Actitis macularia (Linnaeus) 372 



Genus 26. Bartramia Lesson 378 



46. Bartramia longicauda (Bechstein) 379 



Genus 27. Xumenius Brisson - 385 



Key to the Species and Subspecies of Xmneniiis 386 



47. Numenius arquatus (Linnaeus) 386 



48. Numenius americanus americanus Bechstein 390 



49. Numenius americanus occidentalis (Woodhouse) 394 



Genus 28. Phseopus CuWer 395 



Key to the Species and Subspecies of Phaeopus 396 



50. Phaeopus phaeopus phaeopus (Linnaeus) 397 



51. Phaeopus hudsonicus (Latham) 402 



52. Phaeopus tahitiensis (Gmelin) 407 



Genus 29. Mesoscolopax Sharpe 410 



Key to the Species of Mesoscolopax 411 



53. Mesoscolopax borealis (Forster) 412 



Family Phalaropodid^. The Phalaropes 416 



Key to the Genera of Phalaropodidae 417 



Genus 1. Phalaropus Brisson 417 



1. Phalaropus fulicarius (Linnaeus) 418 



Genus 2. Lobipes CuAder 423 



2. Lobipes lobatus (Linnaeus) 424 



Genus 3. Steganopus Vieillot 430 



3. Steganopus tricolor Vieillot 431 



Family RecurvirostriDvE. The Avocets and Stilts 435 



Key to the Genera of Recur\-irostridse 436 



Genus 1. Ilecur\-iro3tra Linnaeus 436 



Key to the American Species of Recur\drostra 437 



1. Recur^'irostra americana Gmelin 437 



Genus 2. Himantopus Brisson 441 



Key to the .\merican and Hawaiian Species of Himantopus 442 



2. Himantopus mexicanus (Mtiller) 442 



Suborder Lari. The Gull Tribe 447 



Key to the Families of Lari 449 



Family Rynchopid.e. The Skimmers 449 



Genus 1. Rynchops Linnaeus 450 



Key to the Species and Subspecies of Rynchops 451 



1. Rynchops nigra nigra (Linnaeus) 451 



2. Rynchops nigra intercedens (Saunders) 453 



3. Rynchops cinerascens Spix 455 



Family Sterkid^. The Terns 458 



Key to the Genera of Sternidae 458 



Genus 1. Hydroprogne Kaup 460 



1. Hydroprogne caspia (Pallas) 461 



Genus 2. Thalasseus Boie 466 



