. Gli uccelli di Illinois e Wisconsin. rly un residente estivo molto comune in tutte le regioni pesantemente boscose circa ruscelli; al momento morecomcon durante le migrazioni, la primavera e la caduta. =•= == * * numeri considerati nidificano ancora in località favorevoli nelle parti centrali e settentrionali dello stato e in alcune località del Wisconsin meridionale, come il lago Delavan. (Kumlien e Hollister, Birds Wisconsin,1903, pag. 20.) Sottofamiglia FULIGULINIE. Le anatre del mare. I membri di questa sottofamiglia hanno il disegno di legge largo, e un lembo di lobo membranoso sulla punta della nuda. Anche se classificato come anatre di mare 332 campo Mus

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. The birds of Illinois and Wisconsin . rly a very common summer resident inall heavily wooded regions about streams; at the present time morecommon during the migrations, spring and fall. =•= == * * Consider-able numbers still nest in favorable localities in the central andnorthern parts of the state and in a few places in southern Wisconsin, as about Delavan Lake. (Kumlien and Hollister, Birds Wisconsin, 1903, p. 20.) Subfamily FULIGULINiE. The Sea Ducks. The members of this subfamily have the bill broad, and a flap ormembranous lobe on the hind toe. Although classed as sea ducks 332 Field Museum of Natural History — Zoology, Vol. IX. because they are partial to salt water, manyof the species occur in large numbers onthe interior lakes, rivers, and marshes. Theirfood consists of mollusks, small fish, andcrustaceans, as well as the roots of aquaticplants and seeds. Their nests are usuallyplaced on the ground or among rocks, al-though a few species, such as the Golden-eye, Buffle Head, etc., laytheir eggs in hollow trees.. .:^ Genus MARILA Oken. 51. Marila americana (Eyton). Redhead. Aythya americana (Eyt.), A. O. U. Check List, 1895, p. 52.Local name: Redhead Duck. Distr.: North America, breeding from Maine, northern Michigan, Wisconsin, and California northward. Winters in numbers fromChesapeake Bay to Florida and along the Gvilf coast to Texas, casualas far south as Mexico and Jamaica. Adult male: Head and neck, brownish chestnut; lower neck andupper breast, blackish; back, apparently grayish, being white pencilled with fine, wavy lines ofblack; speculum, gray-ish ; upper feathersedged with black, therest narrowly tippedwith white. Length, 21; wing, 8.40; tarsus, 1.60; bill, 2.20.Q Adidt female: Bill, bluish, showing an in-distinct bar near the end; head and neck, reddish brown, palest on thesides of the head, becoming ashy on the sides of the head; upperthroat, white; breast and sides, brownish; belly, white; under tailcoverts and lower belly, sometimes washed wi

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