226 ANATIDJ-:. 



common near Mazatlan, in Western Mexico, during the same period. It frequents 

 the bays on the coast in winter, but during the breeding-season is found only on fresh- 

 water lakes and rivers. 



This bird, known in many parts of North America as the " Whistler," is recorded 

 as very shy and wary, and is possessed of exceptional diving powers ; it is also of very 

 powerful flight. The eggs, which are of a pea-green or greyish-green colour, are 

 laid in stumps or holes of hollow trees, the cavity being lined with the bird's own 

 down. 



2. Olaugula albeola. 



Anas albeola, Linn. Syst. Nat. i. p. 199 '. 

 Bucephala albeola, Duges, La Nat. i. p. 143 ^. 



Charitonetta albeola, A. O. U. Check-1. N. Amer. Birds, 2nd ed. p. 54'. 



Clangula albeola, Baird, Brewer, & Ridgw. Water-Birds N. Amer. ii. p. 48 ' ; Salvad. Cat. Birds 

 Brit. Mus. xxvii. p. 385 '. 



Supra nigra, supracaudalibus grisescentibus ; scapularibus externis albis, harum longioribus anguste nigro termi- 

 natis; alis sicut in C. glaucion coloratis, sed tecfcricibua marginalibus albo limbatis; rectricibus saturate 

 cinerascenti-brunneis, externis albo marginatis; capite et colli dimidio summo metallice viridibus ; pileo, 

 cello lateral! et gutture purpurascente nitentibus, plaga magna postoculari alba, usque ad occiput 

 extensa ; torque collar! albo; corpore reliquo subtus albo: rostro cyanescenti- nigro ; pedtbus rosaceis, 

 palmis saturatioribus ; iride saturate brunnea. Long, tota circa 15-0, alse 7*0, caudae 3'5, culm. 1"0, 

 tarsi I'l. (Descr. maris adulti ex Massachusetts. Mus. nostr.) 



5 . Supra brunnescenti-nigra, urop)-gio nigro, supracaudalibus brunnescentioribus; aUs caudaque brunnescenti- 

 nigris, secundariis medianis extus apicem versus albis, speculum alare formantibus ; capite et coUo 

 saturate brunneis, vix purpureo nitentibus ; genis et regione parotica albis, aream longitudinalem Eilbam 

 formantibus: subtus pure alba, praepectore griseo lavato ; corporis lateribus, crisso et subcaudalibus 

 bruunescenti-griseis : rostro fnsco ; pedibus et iride sicut in iiiari coloratis. Long, tota circa 12'5, alee 6*0, 

 caudae 3'0, culm. 1-0, tarsi I'O. (Descr. feminae adultae ex Tarpon Springs, JFlorida. Mus. nostr.) 



Juv. band a femioa adulta distinguenda. 



Ilah. North America, breeding from Maine and Montana northward through the 

 Fur Countries to Alaska, migrating south in winter^. — Mexico, Chihuahua 

 {Kennedy'^), Tamaulipas [Berlandier^), Guanajuato (i>M^es 2). — Cuba ^ ^. — Acci- 

 dental in Europe ^. 



The Buffle-headed Duck rarely occurs within true Central-American limits, but 

 it has been recorded from Guanajuato by Professor Duges ^, and is said by Dr. Ber- 

 landier to be found in winter in Tamaulipas on the borders of the rivers and marshes 

 in that State *- Dr. Kennerly also records that this Duck was found in large flocks at 

 the Boca Grande in Chihuahua, and also at other points on the Conalitos and Janos 

 Kivers *. 



C. albeola is an inhabitant of the Arctic and Subarctic Regions of North America, 

 breeding in the far north in summer. The bird lines the cavity of a tree with its own 

 down for the reception of the eggs, but otherwise makes no nest. Though not at 



