Total length five inches and a half. Bill blueish, three quarters of an inch from the angle of the mouth, and four-tenths from the nostrils, which are ovately round, rather large, and simple, being entirely devoid of an external membrane, but the base is partially covered with small thick-set, short, setaceous feathers; between the eye and base of the bill are a few weak and short hairs; the upper part of the head, as far as the nape, is capped by deep-black, having a blueish gloss: between the nostrils and the eye, as well as on the chin and throat, the colour is white, which changes to a pale cinereous grey on the sides of the head and round the neck; the ears at their base and margin of the eye tinged with yellow; the rest of the upper plumage yellowish-olive. The under plumage on the lower part of the neck and breast, the sides, and the inner wing-covers are clear yellow, and from that to the vent white. Wings two inches long, the quills brown, margined externally with olive and internally with yellow; the first and second quill progressively shorter than the third and fourth, which are of equal length. Tail short, slightly divaricated; olive, with whitish marginal tips. Legs blueish-black; the three fore-toes are equally cleft, but a membrane will be found connecting them equally at the base nearly as far as the first joint. Temminck must be mistaken in giving as a generic character to this genus, that the external toe is connected to the middle one as far as the first joint, and the inner toe cleft to the base; at least such is not the case either in my specimens of this bird or in those of the Cayenne Shrike: and they have been carefully relaxed in warm water, the best method of ascertaining such peculiarities. * * * * * Pl. 33 [Illustration] TAMYRIS Zeleucus. * * * * * GENERIC CHARACTER. _Antennae arcuatae, clava terminali, crassata, lineari, obtusa, in foeminis graciliore attenuata. Palpi in fronte convexe-compressi, supra linguam obvenientes, articulo ultimo minutissimo, crassato obtuso, approximate, proclivi. Alae breves, sedentes horizontaliter divaricatae._ Antennae arcuated; the club terminal, thick, linear, obtuse; more slender and attenuated in the female. Palpi compressed convexly on the front of the head, meeting above the tongue; the last joint very minute, thick, obtuse, approximating and bent forward. Wings short, when at rest horizontally divaricated. * * * * * SPECIFIC CHARACTER, ETC. _T. Alis chalybeis concoloribus, margine albo; capite apiceque corporis sanguineis._ Wings uniform blueish-black, with a slender white margin. Head and top of the body bright red. Hesp. Zeleucus. _Fab. Ent. Syst._ 3. _pt._ 1. _p._ 346. _no._ 317. OBS. _Donovan's Indian Insects_, where that author has figured it by mistake as a native of India.