1042 



SYSTEMA TIC SYNOPSIS. — TUBINARES. 



in down sooty-gray. Atlantic and Mediterranean coasts ; Europe, Africa, and North America; 

 not known to breed on our side. This is the rarest of the three little black white-rumped 

 " Mother Carey's chickens " of our Atlantic coast, easily distinguished by its short legs and 

 square tail; Leach's, the most numerous, is also short-legged, but larger and fork - tailed ; 

 Wilson's is intermediate, with square tail, but very long stilt-like legs, flat claws, and a yellow 

 spot on the webs. 



OCEANOD'ROMA. (Gr. 'Q.Keav6sj OJceanos, Lat. Oceanus, the divinity of the sea, hence 

 the ocean ; bp6)xos, dromos, running.) Fork-tailed Stormy Petrels. Bill much shorter 

 than head, more than ^ as long as tarsus, rather stout, as high as or higher than wide at base, 

 the hook strong and acute; nasal tube less than half as long as culmen. Wings moderately 

 long, folding little beyond tail; 2d or 3d primary longest; 1st about equal to 3d or 4th. Tail 

 long, more or less deeply forked, the feathers all broad, obtusely rounded. Legs short; tibia 

 little l)are below ; tarsus about equal to middle toe and claw. Of rather large size (for this 

 subfamily) and robust form. Color fuliginous, unicolor or with white upper tail-coverts; or 

 variously ashy or gray, mostly white below. About 12-14 species are known. (^Cymochorea 

 and Oceanodroma of former editions of the Key.) 



Analysis of Species. 

 General plumage dark {Cymochorea). 



Upper tail-coverts more or less white. 

 Upper tail-coverts almost entirely white. 



Larger; tail deeply forked, about 75. Atlantic and N. Pacific leucorrhoa 



Smaller ; tail lightly forked, about 0.33. S. and L. California kaedingi 



Upper tail-coverts tipped with black. 



Smaller ; tail lightly forked ; mucli white on tail-feathers. Washington, D. C cryptoleucura 



Larger; tail deeply forked, about 1.00. Guadalupe Isl macrodactyla 



Upper tail-coverts white only on each side. L. and S. California socorroensis 



No white anywhere. 



Sooty-brown ; large ; wing 6.75 ; tail 4.00, forked 1.00 or more. L. and S. California melania 



Sooty-gray ; small ; wing 5.00 ; tail 3.25, forked 0.60-0.90. California homochroa 



General plumage light; no white on upper tail-coverts. (Oceanodroma.) 



Not white below. N. Pacific fnrcata 



White below, with dark collar. N. Pacific hornbyi 



O. leiicor'rhoa. (Gr. XeuKos, leukos, white; oppos, orrhos, rump. Fig. 709.) Leach's 



FoKK-'i'AiLF.D Petrel. White-rumped Petrel. Coloration as in the last species, with 



Ik. Ik. ..^ A white of upper tail-coverts, forming a conspicuous mark ; 



\\\V ^^ wMl^ M ^^^ ^P^' ^^ ^® lighter — rather of a grayish or even ashy hue 



\\\^^N^^. WjjT ^m on some parts; but easily recognized, whatever the shade 



\ ' ' l^Hil^^Hli^^H °^ cdlor. Bill and feet black; iris brown. Length about 



' >^<\ ^H^^^^V 8.00; extent 17..'")0; wing 6.00-6.50; tail 3.00-3.50, forked 



' '*^^^K^W ^^ ___! t^^ about 0.75; tarsus 1.00; middle toe and claw the same; 



\ j^£!^ * 1^^^^ '"^^^^^w ^^^^ 0.67. Seas of the Northern Hemisphere. North 



"vy^^,^^" •"" ■■ jK J**^'^^^^^^' America, both coasts, and west coast of Europe. Abun- 



x^^^^^^»^!5^5^^^^^^^ dant on our North Atlantic coast, breeding from Maine 



^^^^^ ^^^^'*^_1- *^ northward, and equally so at some points on the coast of 



Fio. 700. —Leach's Fork-tailed Petrel, Alaska. Nest in burrows in the ground ; egg single, white, 



much reduced. (From Teuney, after Au- unmarked, or With a Wreath of fine or obscure light-red 



dubon.) .° 



spots around the larger end, 1.20 X 0.95, laid in June. 

 Nestlings sooty. {Cymochorea leucorrhoa of former editions of the Key.) 

 O. kaed'ingi. (To — Kaeding.) Kaeding's Fork-tailed Petrel. Like 0. leucorrhoa; 

 smaller; tail less forked. Sooty black, more plumbeous on head, more brownish on wing- 

 coverts ; long upper tail-coverts white, black-shafted ; lateral lower coverts edged with white ; 

 tail-feathers blackish to base. Wing about 5.00; middle tail-feathers 3.00; lateral 3.33; 

 tarsus 0.80; middle toe and claw 0.80; culmen 0.60. Socorro and Clarion Islands t)f tlie 



