252 REVIEW OF AMERICAN BIRDS. [PART I. 
attenuated towards the end than in any other Sylvicolidex, and re- 
sembling somewhat species of Zodirostrum. 'The excessive gradua- 
tion of the outer quills is another marked feature, although the wing 
is rather pointed. The peculiarities of the scutelle, if real and not 
apparent, point towards the Tyrannidx; although, as far as I can 
determine, there are but nine primaries. The type species belongs 
to the Andean region of Ecuador and New Grenada, and is olive 
green above and on sides, yellow beneath; loral spot, and patch 
on top of head, black. (30,910. Quito. C. R. Buckalew.)* 
‘ In the Smithsonian collection is a female bird, collected in Paraguay, by 
Capt. Page, which resembles somewhat the description by Bonaparte of Myo- 
thlypis luteo-viridis, from Bogota, in being entirely olive green above, the under 
parts, with a line from bill over eye (becoming duller behind), yellow; bili 
horn color; legs yellow. If the Juteo-viridis, however, be the female of MJ. 
nigricristatus, aS Suggested by Bonaparte and Sclater, this specimen cannot 
belong to it, as it differs entirely inform. The bill resembles that of Huthlypis 
lachrymosa, though not quite so long; it is like that of MZ. mitratus, also, in 
the straight culmen and gape, but is wider at base, and entirely lacks the 
Todirostrum character of Myiothlypis nigricristatus. The wings are consider- 
ably shorter than the tail, which is narrow, the feathers much pointed and 
graduated, as in Myiothlypis, but longer (very much as in Geothlypis). The 
wings are less rounded than in JZ. nigricristatus, the 2d quill being a little 
longer than the 6th, not about equal to the 9th. Length, 5.50; wing, 2.45 ; 
difference between Ist and 4th quills, .40; tail, 2.90, its graduation, .35; 
tarsus, .86; middle toe and claw, .65; bill from gape, .64, There is no indi- 
cation of crest. (16,334. 9. Paraguay, June, 1859. Capt. Page, U.S. N., 
No. 53.) 
The relationships of this species are certainly nearest to Myiothlypis, differ- 
ing mainly in longer tail, less graduated wing, and differently shaped lateral 
outline of bill. To include the two together, the characters of the genus 
must be considerably modified ; somewhat as follows: ‘“ Bill much depressed, 
very broad at base, but thickened ; the culmen and commissure straight to 
near the tip; bristles prominent. Wings shorter than the tail, graduated ; 
the Ist quill not longer than the secondaries. Tail considerably graduated, 
the feathers acutely pointed.” 
Both this bird and M. nigricristatus would be taken for Geothlypis, but for 
the broad, depressed, bristled bill. The Paraguay bird may be called, pro- 
visionally, MJ. flaveolus if not luteo-viridis. 
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