152 PHALACEOCOEACID^. 



Hob. Pacific Coasts of Noetheen Asia and Noeth Ameeica, south to Cape San 

 Lucas '^. — Mexico, Mazatlan^, Valley of Mexico {Herrera^). 



This species belongs to the group of the genus which possesses twelve tail-feathers. 

 In breeding-plumage it has two distinct crests, one on the crown, and a second on the 

 nape, and a large white patch on each flank. The forehead is feathered and the wing- 

 coverts and scapulars are greenish and violet-bronze with greeu reflections ■*. In 

 non-breeding plumage it may be recognized by its greenish-black under surface and 

 feathered forehead, and by the absence of black marginal bands to the feathers of the 

 back and scapulars, which are greenish and purple-bronze with green reflections, the 

 neck being deep violet-blue ^. 



Three races of this Cormorant are admitted by American ornithologists, of which 

 two, P. pelagicus, and its ally, P. robtiMus, are confined to the Western Pacific — the 

 first inhabiting the Aleutian Islands, the second extending from Alaska to Washington 

 Territory, whence it is replaced southward by P. resplendens, which is the form said to 

 extend to the coast of Mazatlan. Mr. Ogilvie Grant gives a series of measurements 

 to show that the diff'erence in size of bill, on which these forms have been separated, 

 is not a constant feature, and that in this respect the three races merge into one. We 

 therefore follow him in uniting them. 



Beyond the fact that the species is said to reach Cape San Lucas and Mazatlan, and 

 the statement of Herrera ^ that it occurs in the Valley of Mexico, we have no notes on 

 its occurrence in any other part of the Central- American region. This author also 

 mentions P. mexicanus as an inhabitant of the Valley of Mexico, so that it is evident 

 that he was acquainted with two species, and his identification of P. pelagicus is 

 therefore probably correct. 



2. Phalacrocorax auritus. 



Carbo aurittts. Less. Traite d'Orn. p. 605 '. 



Phalacrocorax auritus, Ogilvie Grant, Cat. Birds Brit. Mus. xxvi. p. 333 ', 337 ', 370 *. 



Phalacrocorax dilophus, A. O. U. Check-1. N. Amer. Birds, 2nd ed. p. -±2 " ; Ridgw. Man. 



X. Amer. Birds, 2nd ed, p. 78 \ 

 Phalacrocorax floridanus (Audub.), Salv. Ibis, 1864, p. 374' ; 1866, p. 200'; 1889, p. 376'. 

 Phalacrocorax dilophus floridanus, A. O. U. Cbeck-1. X. Amer. Birds, 2nd ed. p. 42"; Ridgw. 



Man. N. Amer. Birds, 2nd ed. p. 78 ". 



Ptil. cestiv. Supra bronzino-brunneTis, plumis late nigro marginatis ; priraariis nigricantibus ; dorso postico, 

 uropygio et supracaudalibus chalybeo-nigris ; Cauda nigra : crista elongata supraciliari utrinqne nigra ; 

 pileo cum collo et corpore subtus toto nigris, chalybeo-viridi vix niteatibus ; maxilla nigra, griseo vel flavo 

 lateraliter marmorata, mandibula flavescente vel pallide cyanea, fusco marmorata ; loris, regione oculari 

 et guttui-is partibus nudis laete aurantiacis ; palpebris et palato laete cyaneis ; pedibus nigris ; iride l^te 

 graminea. Long, tota circa 29-0, als 12-0, caudae 5-9, culm. 2-1, tarsi 21.5. (Descr. maris adulti ex 

 Tarpon Springs. Mns. nostr.) 



5 man. similis, sed pauUo minor. 



Ptil. hifm. similis ptilosi asstiva', sed cristarum plumis absentibus; loris gulaqne nudis flavis, palpebris et 

 palato minime cyaneis. 



