x TABLE OF CONTENTS. 
Genus 24. Heteroscelus Baird.........2-2-- 02 eee cece ener ot 
Key to the Species of Heteroscelus......-----------e2ererre rrr” ee eS 367 
- 44, Heteroscelus incanus (Gmelin).........----22-ecr errr 371 
Genus 25. Actitis Illiger..........-.------ee cece ence 372 
Key to the Species of Actitis.........2......200eeeeere cece r eerste 
45. Actitis macularia (Linneeus)...........-----22err eter” -- 872 
Genus 26. Bartramia Lesson.........---..02ceceeecee cere ecerenerere reste 378 
46. Bartramia longicauda (Bechstein)........-.----+-2eeeercerrrerrt 379 
. Genus 27, Numenius Brisson ...........--.22200eeeeereeeeeerererssretee 385 
Key to the Species and Subspecies of Numenius....---.--------+-++7recerres 386 
47, Numenius arquatus (Linneeus)......-.-.-------22ee cee e crests 386 
48. Numenius americanus americanus Bechstein....-----------+--+-+++++- 390 
49. Numenius americanus occidentalis (Woodhouse)..-.-------+-----++-- 394 
Genus 28. Phssopus Cuvier........-2.202- ee ee cece rece eres e enc ee ntsc cence 395 
Key to the Species and Subspecies of Pheeopus......-.-------+-++++-++2+ee+- 396 
50. Phzeopus pheopus pheeopus (Linneeus).....----.---- -22 eee eee eee ee 397 
51. Pheeopus hudsonicus (Latham).......----------2-ee cece eee e cece eee 402° 
52. Pheeopus tahitiensis (Gmelin)......-...-----+-- 202 - ee eee eee reece 407 
Genus 29. Mesoscolopax Sharpe........--s0eee- eee 2 cere eee eee e teers ceceees 410 
Key to the Species of Mesoscolopax .....-------0e2ee cece eee e secre cece eneees 411 
53. Mesoscolopax borealis (Forster)... ...------2e-e-ee ence cece eee e eee 412 
Famity PHALAROPODID#. THE PHALAROPES.......-.---+---222eee cere renee 416 
Key to the Genera of Phalaropodide.........--..0---- 20sec cere e reece ee eeee 417 
Genus 1. Phalaropus Brisson. . .------...- 222. s eee ce eee eee ee scene een e neces 417 
1. Phalaropus fulicarius (Linnzeus).......-...-020022ee sees cece eee eens 418 
Genus'2.. Lobipes Cuvier... .-2.2cee- eae escessietetwass seeencaeee wes 423 
2. Lobipes lobatus (Linnzeus).......... 20-2022 ce eee cece een eee cee eee 424 
Genus 3. Steganopus Vieillot. .......--- 222-222 e eee eee eee eee eee eee ee neee 430 
3. Steganopus tricolor Vieillot. .-....-.. 2.22.2... e ee eee eee eee eee e eee 431 
Famity Recurvirostriv#. Tue Avocets and STInts..,.........-.-.------ 435 
Key to the Genera of Recurvirostride:....-.-.2-------e- cece eee e ee eee cece cess 436 
Genus 1. Recurvirostra Linneus..........- 22-22 e eee ee cece ec ee cee eee eeeee 436 
Key to the American Species of Recurvirostra .....-.------+------eee ence eee 437 
1. Recurvirostra americana Gmelin...........22-022 20 cece eee cece eee 437 
Genus 2. Himantopus Brisson.............2.... 2c eee cece cece cece eee eeeee 441 
Key to the American and Hawaiian Species of Himantopus..............-..- 442 
2. Himantopus mexicanus (Miiller)............-.-2-20 2s cee eee ee eee eee 442 
SuBorDeR Lari. THe GULL TRIBE........--- 220 e eee eee ee ec eee eens 447 
Key to the Families of Lari-.......2. 20.0220 22 eee ee eee eee eee ence cen eeeee 449 
Famity Ryncnopipm. THE SKIMMERS........0..0..02 cece cece cece eee enee 449 
Genus 1. Rynchops Linneeus......-- 226-2 eee ee cee ec eee cece neee 450 
Key to the Species and Subspecies of Rynchops..............0...cceceeececees 451 
1. Rynchops nigra nigra (Linnzeus)....... 22.20. cee eee cence eee nce eee 451 
2. Rynchops nigra intercedens (Saunders)...-............020.0ccce cece 453 
3. Rynchops cinerascens Spix.........2.22 2-0. cece eee cece cence cece cece 455 
Famity STernipm. THE TERNS...........2--. 0020 e ccc cece cece cae ceccccce 458 
Key to the Genera of Sternidee...... 2.22.22... cee eee ee eee cece nec e ce ccc ce 458 
Genus 1. Hydroprogne Kaup ....--- 2.20... .02 2 ee cee eee cce ec ccceecececacece 460 
1. Hydroprogne caspia (Pallas)..........22 22.00. c ccc ce eccecccececcceeee 461 
