438 Birds of Colorado 
Grey Vireo. Vireo vicinior. 
A.0.U. Checklist no 634—Colorado Record—H. G. Smith 08, p. 189. 
Description.—Male—Above slaty-grey, with a hardly perceptible 
wash of olive on the rump ; a white orbital ring and dirty-white lores ; 
wings and tail dusky, edged with whitish ; greater coverts tipped with 
whitish, but hardly forming a distinct wing-band ; below dull white 
tinged with grey on the throat and breast and more or less with olive 
on the flanks ; iris brown, bill dusky, markedly pale along the cutting- 
edges, legs dusky. Length 4-90; wing 2-60; tail 2-30; culmen .40; 
tarsus -72. : 
The sexes are alike, and the young are very similar to the adults. 
Distribution.— From southern California and western Texas south- 
wards into north-west Mexico and Lower California. 
The inclusion of the Grey Vireo in the Colorado fauna is also due to 
the indefatigable collecting of Mr. H. G. Smith, who obtained two pairs 
of this species at Lamar on the Arkansas River in Prowers co., between 
May 16th and 20th, 1907, thus extending the range of the species 
considerably northwards ; the nearest recorded locality in New Mexico 
is Las Vegas. 
Family MNIOTILTID. 
This family contains the Warblers or, more properly 
speaking, the American Warblers, as the birds known 
by that name in Europe belong to quite another family. 
The American Warblers are all small birds; except 
Icteria and Seiurus, they hardly average over five inches 
in length. It is not possible to characterize them exactly 
and definitely, as they present a number of minor modi- 
fications of form in the direction of other families, but 
they have the following external characteristics in 
common: Bill small, generally acute,the breadth and 
depth about equal; no lobe or tooth along the cutting- 
edge, never strongly hooked at the tip and never very 
much flattened ; gape comparatively short and usually 
with a few rictal bristles; wings with nine primaries, 
the inner secondaries or tertials never greatly elongated ; 
tarsus scutellate ; rectrices twelve. 
The members of this family are confined to America, 
and have their centre of abundance perhaps in the eastern 
