OF THE GALAPAGOS ARCHIPELAGO. 473 
ference being its larger size, its having the chest marked with dark brown instead of 
. being white, and in the white terminations to the wing-coverts and secondaries being 
more conspicuous. 
M. parvulus is very closely related to M. melanotis; and I am inclined to believe that 
a larger series of specimens would show that the differences (in size alone) would gra- 
dually disappear. It must be observed that the specimen of the small bird (JZ. par- 
vulus) came from the sterile part of Albemarle Island (probably Tagus Cove), and 
hence may represent a small starved race of the more robust M. melanotis. 
Genus DENDRE@CA. 
The species of this somewhat varied genus, so far as coloration is concerned, found 
in the Galapagos Islands belongs to the rather restricted section which is best known by 
the common Dendreca estiva of North America. This last-named bird is extremely 
abundant, and migrates from the northern continent in autumn to spend its winter in 
Central America and the northern provinces of South America. Other members of this 
section are found stationary in Central America and the West-Indian Islands. Closely 
allied races are to be found in Cuba, Jamaica, the Virgin Islands, and Barbadoes. ‘The 
Central-American bird is rather more distinctly differentiated, being itself divisible into 
two very closely related races. Mr. Ridgway, the most recent writer on this genus, 
gives the following as the species and varieties of this section of the genus :— 
Denpreca zstrva. Entire continent of North America, migrating in winter to Central and South: 
America as far as New Granada. 5 
Denpre@ca perecuta. West Indies, except Trinidad and Barbadoes. 
Var. gundlachi. Cuba and the Bahamas. 
Var. petechia. Jamaica and Haiti. 
Var. ruficapilla. Porto Rico, St. Thomas, St. Croix, and St. Bartholomew. 
Derypra@ca aurzota. Galapagos Islands. 
Dernpreca carivatis. Barbadoes. 
Denpreca vierttori1. Central America and New Granada. 
Var. vieilloti. New Granada. 
Var. rufigula. Isthmus of Panama. 
Var. bryanti. Honduras and Yucatan to Mazatlan. 
As it is very difficult to distinguish specifically between fully adult birds from the 
Galapagos Islands and Jamaica, the generic affinities between D. aureola and other 
members of Dendreca are complete. 
DENDRG@CA AUREOLA. 
Sylvicola aureola, Gould, Zool. Voy. Beagle, iii. p. 86, t. xvii. 
Dendreca aureola, Baird, Rev. Am. B. i. p. 194 (note) ; Ridgw. N.-Am. Birds, i. p. 217. 
Dendreca petechia, var., Sundev. P. Z. 8. 1871, p. 124. 
Mniotilte d’été, Prév. et Des Murs, Voy. Vénus, v. p. 197. 
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