THE FRIGATE -PETREL. 419 



Genus PELAGODROMA Rchb. 



Pelagodroma Reichenbach, Av. Syst. Nat., p. iv (1B52 — Monotype 

 P. marina). 



Differs at glance from Hydrobates, Oceanodroma, and Oceanites 

 by its white underside and very long and strong feet and tarsi, 

 latter being very little longer than toes. 2nd developed primary 

 longest, 3rd shorter than 2nd. Tail emarginated for about 10 mm. 

 Only one species. 



PELAGODROMA MARINA 



336. Pelagodroma marina hypoleuca * (Webb, Berth, and Moq.- 

 Tandon)— THE FRIGATE-PETREL. 



That.assidroma hypoleuca Webb, Berthelot et Moquin-Tandon, Hist. 

 Nat. lies Canar., Zool., On., p. 45 (1841 — Tenerife). 



Pelagodroma marina (Latham), Saunders, p. 735 ; Hand-List Brit. 

 Birds (1912), p. 151. 



Description. — Adult male and female. Winter and summer. — 

 Fore-head, lores and stripe over and behind eye white slightly 

 mottled ash-brown especially in centre of fore-head, where feathers 

 are only lightly tipped white and on eye -stripe, where feathers are 

 often tipped ash-brown ; crown dark brownish-slate ; hind-neck 

 and upper-mantle paler and greyer, feathers when fresh very 

 narrowly tipped white ; rest 

 of mantle, back and scapu- 

 lars dark brown ; rump and 

 upper tail-coverts ash-grey, 

 when fresh with very narrow 

 whitish tip and equally nar- 

 row subterminal dark line, 

 bases more or less white 

 mottled grey ; immediately 

 in front of eye and extend- I 



ing Under eye to base of The Frigate-Petrel {Pelagodroma marina hypoleuca). 



ear - coverts black - brown 



tinged grey as crown, forming a dark stripe under and parallel to 

 white eye-stripe ; chin, throat and under -parts white, but sides of 

 lower -neck joining grey of hind-neck and extending on to sides of 

 lower -throat and upper-breast ash-grey ; flanks narrowly and 

 lightly streaked ash-grey, lower-flanks more mottled and some 

 more or less barred ash-grey ; upper under tail-coverts more grey 

 barred or mottled and narrowly tipped white, longer under tail- 



* By the kindness of Mr. L. E. Hope of the Carlisle Museum we have been 

 able to examine the Walney Island example, which has the long bill (18 mm.) 

 of P. m. hypoleuca though the colour of its upper-parts is rather darker than 

 is usual in that form ; its tail is almost square. Pelagodroma marina marina 

 (Lath.) (Procellaria marina Latham, Index Orn., 11, p. 826, 1790, " Habitat in 

 Mari australi ; latitudine 37") inhabits the southern Atlantic. 



