Direclor' s An>nial Report. 



Order LONGIPENNES.— Lono--wino'ed Swimmers. 



a'. Bill without cere, lower mandible not longer than upper, 

 tail feathers twelve, claws feeble or moderate. Family Laridu\ 

 Gulls and Terns. 



b'. Tail even, hind toe perfedlh' developed but small, cul- 

 -men more than two-thirds as long as tarsus. Genus Larus. 

 b'. Tail graduated. 



C'. Outer tail feathers broad and rounded at tip. 



d'. Wing less than 9.5, general color black, 

 wings lighter. Genus Hydrochelidon . 



d". Wings more than 9.5, general color, includ- 

 ing wings, a sooty black. Genus Anojis. 



C". Outer tail feathers sharp, pointed, the next to the 

 outer pair the longest, general color pure white. Genus Gygis, 

 Wagler. 



Genus I/ARUS Linn^us. 



I. Icarus vegae (Palmen). Pallas' Gull. 



Mantle light gray or pearl gra}' ; no black spot on the bill of 

 the adult. lyCngth 26, wing 15. 15-18.30, culmen 1.90-2.20, tarsus 

 2.15-2.20. Hab. Pacific Ocean, probably accidental on the Mari- 

 anas, only one specimen having been taken there, which is now in 

 the Paris Museum. 



Gems HYDROCHEI/IDON Boie 



2. Hydrochelidon leucoptera (Temm. ). White - winged 



Black Tern. 



General color black, silver}- and white on wings; young and 

 winter specimens with tail and under parts white. lyCngth 9.3, 

 culmen i.i, wing 8.2, tail 3.1, tarsus .75, mid-toe and claw 1. 

 Hab. ( Doubtful) Parts of the Australian and American coasts. 



CtExus ANGUS Leach. 



a'. Forehead alone is distinctly whitish. Aiwus stolidus,\Jin\\. 

 a-. lintire top of head whitish, the white changing gradually 

 into ashy on the hind neck. Anoiis lc2icocapiUus, Gould. 



3. Anous leucocapillus Gxould. Black - cheeked Noddy. 



Lores jet l>lack, cheeks dusky, upper and under parts nearly- 

 black, tarsus and toes dark brown. Length 13, culmen 2, wing 9, 

 tail 5, tarsus .9, mid-toe and claw i .4. Hab. Inter-tropical Atlantic, 



