. The birds of British Guiana, based on the collection of Frederick Vavasour McConnell. Birds. BIRDS OF BRITISH GUIANA. associated by previous authors with ThamnopUlus leachi Such, as the type; but, when one compares that bird with the figure, it will be easily seen that Eeichenbach could not have intended it, as the bill is not anything like it. The species was originally, and has for many years been, placed in the genus ThamnopUlus Vieillot, where it was equally out of place, as it is so entirely different from that genus, which was founded on Lanius doliatus Linn. I have pro- posed, therefo
. The birds of British Guiana, based on the collection of Frederick Vavasour McConnell. Birds. BIRDS OF BRITISH GUIANA. associated by previous authors with ThamnopUlus leachi Such, as the type; but, when one compares that bird with the figure, it will be easily seen that Eeichenbach could not have intended it, as the bill is not anything like it. The species was originally, and has for many years been, placed in the genus ThamnopUlus Vieillot, where it was equally out of place, as it is so entirely different from that genus, which was founded on Lanius doliatus Linn. I have pro- posed, therefore, the new generic title Mackenzicena, with the following characters:—Head not crested, no concealed white dorsal patch, tail much longer than wing. Bill short and stout, the depth about two-thirds the length of the exposed culmen ; the wing, which is shorter than the tail, has the fifth primary longest; the tail is rounded and much graduated, the two middle feathers longest. Coloration : the male is black with ovate white spots and bars to the feathers, and the female is brown marked with buff. This genus is named in honour of Mrs. Helen Mackenzie McConnell. ] PREDERICKENA Chubb. FredericJcena Chubb, Ann. & Mag. Nat. Hist. (9) ii. 1918, July 1, p. Fig. 6.—Frederic^ena viridis. The chief characters of this genus are the nuchal crest, which is composed of rather broad feathers with rounded tips; no con- cealed white dorsal patch ; the bill is short and stout, the depth being about half the length of the exposed culmen ; the wings are rounded, the fourth, fifth, and sixth primaries longest and sub- equal, the seventh is between the third and fourth; the tail, which is also rounded and graduated, is about two-thirds the length of the wing. Coloration : the male is almost uniform, but the female has the tail and entire under surface Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - co
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