FREGATID.^. 15 



a. Phtniagc of the head and iicck, as zvcll as most all of llic /ippcr parts, 

 pure ti'/u'tr. 



b. Greater part of tail feathers broiiniish hlaek; naked skin of the face and 

 throat blackish (blueisli in life); neck and body entirely white; primaries, secondaries 

 together with most of the tail, brownish black ; wing coverts white. Yoioig: Head, neck 

 and npper parts plain dark brown; part of the neck streaked with white. NestUiios 

 covered with white down. Length 25.00-29.00, wing 15.00-17.00, tail S. 25-10. 00, 

 cnlmen 3.60-4.25, depth of bill i. 40-1. 60, tarsns 2.25, middle toe 3.25. Hah. Central 

 Pacific Ocean. Lavsan, French Frigates, Midway, etc. 



PI. XXL, 7933. 22. S. cy'anops Srxn. Blue-faced Booby. 



bb. Tail pure n'liite; outer web of primary feathers hoary grey; outer webs 

 of secondaries and their coverts hoary; smaller wing coverts white like the rest of the 

 body; all more or less rich white and tinged with buff; feet reddish. Young: Above 

 sootv brown, hind neck and lower parts light smokv grey (plumage extremely variable). 

 Length 23.00-27.00, wing 15.00, tail 6.75-7.25, culmen 3.40-3.50, depth of bill 1.40. 

 Hab. Inter-tropical seas. Niihau, Oahu, Lisianski, Laysan, French Frigates, etc. 



PI. XXL, 7933. 23. S. pisca'tor (Linn). Red-footed Booby. 



aa. PliDiiage of the upper parts /lu/fornt deep sooty brown; head, neck and chest 



deep sootv brown like the back ; lower parts white; tail and wings uniform with the 



back. ]'ouno: Nearlv uniform sootv brown, paler beneath. Length 30.00-31. 00, wing 



15.50, tail 7.50, tarsus 1.80, culmen 4.00 (4.25$ ). Hab. Tropical seas. Xiihau, 



Laysan, etc. 

 PL XXL, 8752. 24. S. sula LiN.x. Booby. 



Famii.v FRE^GATID^.— Max-o'-war Bird. 



(renus. 

 Chara(51:ers for the genus same as for the familv (P^g^ I5-) Frega'ta. 



Genus FREGATA Civikk. 



Culmen more than 4.25; bill long and strongly hooked at the extremitv, both 

 mandibles being curved downward. Male: Breast and sides sootv black and culmen 

 strong; feathers of the head, back and scapulars elongated, pointed, and a glossv oil- 

 green with a bronze sheen (no white on the flanks); gular pouch scarlet orange 

 (fading). Female: Breast and sides white; culmen longer (5.00); head and neck not 

 .so glossv; back of the neck, lesser and median wing coverts brown with paler margins. 

 Young-, both se.ves: Head and neck as well as iipper half of chest white with an occa- 

 sional rustv feather about head and sides ; upper breast dark sooty brown ; otherwise 

 as in the female. Length 37.50-41.00, wing 23.00-25.00, tail 15.00, tarsus .65. Hab. 

 Tropical and sub-tropical seas. Hawaiian Islands. 



25. F. a'quila Lixx Man-o'-war Bird, Iwa. 



r=7ii 



