a 
178 ORNITHOLOGY AND OOLOGY. .« 
Famity SYLVIIDA. THe Woop-InHABITERS. 
‘ Bill slender, broad, and depressed at the base, distinctly notched and decurved 
at the tip; culmen sharp ridged at base; frontal feathers reaching to the nostrils, 
which are oval, with membrane above, and overhung —not concealed —by a few 
bristles or by a feather; rictal bristles extending beyond nostrils; tarsi booted or 
scutellate; basal joint of middle toe attached its whole length externally, half-way 
internally; primaries ten; spurious primary about half the second, which is shorter 
than the seventh; lateral toes equal.’”” — BArrp. 
REGULUS, Cuvier. 
Regulus, Cuv1ER, Lecons d’ Anat. Comp., 1799-1800 (Agassiz). (Type Motacilla 
regulus, Linneus; Regulus cristatus, Koch.) 
Bill slender, much shorter than the head, depressed at base, but becoming rapidly 
compressed, moderately notched at tip; culmen straight to near the tip, then gently 
curved; commissure straight; gonys convex; rictus well provided with bristles; 
nostril covered by a single bristly feather directed forwards; tarsi elongated, 
exceeding considerably the middle toe, and without scutelle; lateral toes about 
equal, hind toe with the claw longer than the middle one, and about half the toe; 
claws all much curved; first primary about one-third as long as the longest, second 
equal to fifth or sixth; tail shorter than the wings, moderately forked, the feathers 
acuminate; colors olive-green above, whitish beneath; size very small. 
REGULUS CALENDULA. — Licht. 
The Ruby-crowned Wren. 
Motacilla calendula, Linneus. Syst. Nat., I. (1766) 337. 
’ Sylvia calendula, Wilson. Am. Orn., I. (1808) 83. 
Requlus calendula, Nuttall. Man., I. (1832) 415. Aud. Orn. Biog., IT. (1834) 546 
DESCRIPTION. 
Above dark greenish-olive, passing into bright olive-green on the rump and 
outer edges of the wings and tail; crown with a large concealed patch of scarlet 
feathers, which are white at the base; the under parts are grayish-white tinged 
with pale olive-yellow, especially behind; a ring round the eye, two bands on the 
wing coverts, and the exterior of the inner tertials white. Young without the red 
on the crown. The female differs very little in color. It is quite probable that the 
species does not attain the red patch in the crown until the second year, as the 
spring migrations of the species always embrace a considerable number with 
the head perfectly plain. 
Length, four and fifty one-hundredths inches; wing, two and thirty-three one- 
hundredths; tail, one and eighty-five one-hundredths. 
