46 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
it was of course to be expected in Lower California, but the only records for 
this region seem to be those of an adult male shot at La Paz February 12, 
1883; a female seen at San Rafael on May 12, 1883, and a male at Trinidad 
on May 14, all by Mr. Belding. 
The Redhead breeds at many places in the more northern United States, 
but most numerously in British North America, to the northern limits of the 
Fur Countries, it is said. 
Aythya affinis (Eyrt.). 
Lesser Scaup Duck. 
Fulix affinis Betpine, Proc. U. 8S. Nat. Mus., VI. 1883, 352 (s. of lat. 24° 30’). 
Aythya affinis Bryant, Proc. Calif. Acad. Sci., 2d ser., II. 1889, 266 (Cape Region). 
Mr. Belding records the Lesser Scaup as rare, but Mr. Frazar found it abun- 
dant at San José del Cabo, where it arrives early in November and remains 
through the winter. His collection contains three specimens. Mr. Bryant saw 
a number of small flocks ‘‘on Magdalena Bay and some distance along the 
estero in 1888,” and in 1889 ‘shot specimens at lower Purisima cafion and at 
a water hole, San Raimundo.” <A few were also observed “ on shallow inland 
water at Ensenada, December, 1885.” 
The Lesser Scaup Duck is not uncommon in winter in California, and it 
migrates as far southward as Mexico and Guatemala, It is believed to nest 
chiefly to the northward of the northern United States. 
Aythya collaris (Donov.). 
RING-NECKED Duck. 
Fulizx collaris Betpine, Proc. U. S. Nat. Mus., VI. 18838, 352 (s. of lat. 24° 30). 
Aythya collaris Bryant, Proc. Calif. Acad. Sci., 2d ser., II. 1889, 266 (Cape Region). 
The Ring-necked Duck is given by Mr. Belding as “‘ rare” in winter and early 
spring south of latitude 24° 30’. I cannot find that any one else has reported 
it from Lower California. It was obtained at Mazatlan by Colonel Grayson, 
and is known to migrate as far south at least as Guatemala. It breeds to some 
extent in the northern United States, but chiefly further to the northward. It 
occurs regularly in winter on the coast of California, but not in any numbers. 
Erismatura jamaicensis (GmMet.). 
Ruppy Duck. 
Ersmatura rubida Ripeway, Proc. U. S. Nat. Mus., V. 18838, 534, footnote (San 
José del Cabo; Laguna de Santiago; Saint Lazaro Mts.). Berxpine, Jbid., 
VI. 1883, 851 (La Paz ands.). Bryant, Proc. Calif. Acad. Sci., 2d ser., II. 
1889, 267 (La Paz). 
Two adult females, taken at San José del Cabo in October, are somewhat 
peculiar in respect to the bill which, with both, is much narrower than in any 
