168 Recent Literature. [April 
Geothlypis trichas roscoe.—Male adult : above, including tail, dark olive- 
green tinged with a rich dark yellow, feathersin highly colored specimens 
being tipped with light brown ; frontal shield of black reaching well up onto 
crown, covering entire face, with narrow stripe over eye and reaching far 
down on the neck; ashy stripe exceedingly narrow and pale. Underparts 
rich gamboge yellow, tinged with brown in winter specimens,and reaching 
well down to and including vent and under tail-coverts, but becoming 
lighter near median line; flanks of a rich chocolate brown varying in in- 
tensity with age. Female differing from ¢vzckas both in size and intensity 
of color. Length of wing (skin), 2.13; tail, .244; bill, .50; tarsus, .75 
inch. Upper and lower mandible black; iris brown; tarsus and feet flesh 
color. Intermediate in habitat and characters between fréchas and occiden- 
talis, but combination of characters peculiar and constant over a very wide 
area. 
FHlabitat: in summer Mississippi Valley, north to Wisconsin, 
Minnesota, etc. ; in winter Gulf States including Florida. 
The single ‘chip’ of this bird, uttered at intervals, while partaking 
of the general characters is louder and harsher, while the songs 
of those heard in March were unmistakably clearer and stronger 
than any yet ascribed to ¢rzchas. 
RECENT LITERATURE. 
Supplement to the A. O. U. Code of Nomenclature and Check-List of 
North American Birds.*—The Supplement to the A. O. U. Check-List of 
North American Birds, mentioned in the last number of ‘The Auk’ (Vol. 
VI, p. 8£) asin preparation, has now been completed and issued, forming 
an octavo pamphlet of 23 pages, uniform in style and typography with the 
‘Code and Check-List.’ As explained in the Preface, it consists ‘‘of the 
tenable species and subspecies, genera and subgenera, added since the pub- 
jication of the Check-List, together with any necessary eliminations and 
valid changes in nomenclature made since the Check-List was issued .... 
The Supplement here presented records the ruling of the Committee on 
about one hundred distinct questions, involving additions to the Check. 
List or changes in its nomenclature. Besides this, the Committee con- 
*Supplement | to the | Code of Nomenclature and Check-List | of | North American 
Birds | adopted by the American Ornithologists’ Union | Prepared by | a Committee 
ofthe Union | — | New York | American Ornithologists’ Union | 1889.—8vo, pp. 23. 
