flanks also) and center of abdomen nearly white; bill and feet as in adult male, but mandible palo grayish brown (bluish gray in life?); length (skin), 112-116 (114); wing, 50-52.5 (51.5); culmen, 43-45 (43.8); tarsus, 14-14.5 (14.1); middle toe, 11-11.5 (11.2).[1]
Immature male. — Similar to the adult female, but whitish superciliary stripe more distinct, and with throat, chest, and breast intermixed with black.
San Miguel Island, Bay of Panamá.
- Drymophila intermedia (not Formicirora intermedia Cabanis) Bangs, Auk, xviii, Jan., 1901. 30 (San Miguél I., Bay of Panamá).
- Formicivora alticincta Bangs, Proc. New Engl. Zool. Club, iii. Mar. 31, 1902, 71 (San Miguél I., Bay of Panamá; coll. E. A. and 0. Bangs). — Thayer and Bangs, Bull. Mus. Comp. Zool., xlvi, 1905, 150 (San Miguél I., crit.).
Genus TERENURA Cabanis and Heine.
Small Formicariidæ (length about 90-100 mm.) with long tail, slender bill, no trace of rictal bristles, and bright coloration.
"This little group leads away from Formicivora [i. e. Microrhopias] to Psilorhamphus and Rhampocænus. The bill is hardly longer than in Formicivora, but smaller; the nostrils are more elongated, and have a slight membraneous operculum as in Psilorhamphus. The tail is rather long, thin, and delicate; the tarsi are more like those of Formicivora, and show the divisions of the scutes."[4]
"Terenura is a peculiar genus of doubtful affinities, but remarkable for the bright colours of its members. These colours (black, bright yellow, chestnut, and olive), it is true, are all to be found in different species of Formicariidæ, but in Terenura alone are they associated in a single bird."
"Cabanis and Heine, who founded the genus, placed it between Rhampocænus and Ellipura (= Formicivora), and in this position it was left by Mr. Sclater. We can not see that it has much in common with either of these forms, which, different as they are, both possess well-defined rictal bristles, not a trace of which can we see in Terenura. Mr. Sclater speaks of the presence in the latter genus of a slightly membraneous nasal operculum such as is found in Rhampocænus, but the specimens of Terenura callinota before us have open nostrils without any overhanging membrane."
