The difference in manners between certain members of this genus is remarkable; thus, the _D. palmarum_ is very terrestrial in its habits, walking upon the ground with the ease and grace of a Titlark (_Anthus_), and, like these birds, it has a wagging motion of the tail. On the other hand, the _Dendroica dominica_ is as much a Creeper as is the _Mniotilta varia_; creeping not only along the branches, but the cornices and lattices of buildings, with the facility of a Nuthatch (_Sitta_). Both these species, however, may often be seen hopping among the foliage of the trees, now and then snapping an insect on the wing, in the manner of others of the family. Species and Varieties. Inner webs of tail-feathers with a large patch, or broad edge, of yellow GROUP A. Inner webs of tail-feathers with a large patch, or broad edge, of white. Wings with conspicuous white markings GROUP B. Wings without conspicuous white markings[37] GROUP C. Group A.—_Golden Warblers._ Rump and crissum without rufous markings _Series I._ Rump and crissum with rufous markings _Series II._ _Series I._ Prevailing color rich yellow, shaded on upper parts with olive-green. ♂ with streaks of chestnut across the breast and along the sides, and with or without a greater or less tinge of the same on the crown. ♀ with the streaks beneath obsolete or entirely wanting; no rufous on crown. _Juv._ paler and duller than the ♀, sometimes quite ashy. A. Tarsus less than .65 of an inch. Outer webs of tail-feathers with yellow predominating. 1. D. æstiva. Crown generally pure yellow, sometimes with only a tinge of rufous; lower webs of wing-coverts and tertials pure yellow; rump and upper tail-coverts much mixed with the same. Wing-formula,[38] 12, 3; wing, 2.60; tail, 2.05; bill, from nostril, .30; tarsus, .62. _Hab._ Entire continent of North America; in winter south to Bogota and Cayenne; Trinidad (only locality in West Indies). B. Tarsus not less than .70 of an inch. Outer webs of tail-feathers with dusky predominating. _a._ Crown without any rufous, or with only a tinge. 2. D. petechia. _Nape olive-green_ (except in _juv._); _sides streaked_ (except in _juv._). Crown greenish, sometimes tinged with orange-rufous anteriorly; lower webs of wing-coverts, etc., not pure yellow, and rump and upper tail-coverts without any admixture of yellow. _Hab._ West Indies (except Barbadoes and Trinidad); not on the Continent. Lower part of throat streaked; outer webs of wing-coverts hardly appreciably different from the general surface. Above golden yellowish-olive; crown generally without a trace of rufous. Wing-formula, 23, 4, 1, 5; wing, 2.55; tail, 2.10; bill, .30; tarsus, .80. _Hab._ Cuba and the Bahamas … var. _gundlachi_.[39]