South American Birds, 123 



Mackenzi^na, gen, uov. 



Reichenbacli, in 1850, proposed the generic name JSl^ius, 

 and gave a figure in bis Av. Syst. Nat, Vog, \)\. Ixxi., which 

 has been associated by previous authors with TkamnophUus 

 leachi, Such, as the type; but, when that bird is compared 

 with the figure, it will be easily seen that Reiclienbacli could 

 not have founded it on tliat species, as it is not anything like 

 it. The species was originally, and has for many years been, 

 placed in the genus I'hamnophilus, Vieiliot, where it was 

 equally out of place, as it is so entirely different from that 

 genus, which was founded on Laniii^ doliatiis, Linn. I 

 propose, therefore, tlie new generic title Mackenzlcpna^ with 

 the following characters: — Head not crested, no concealed 

 wiiite dorsal j)atch, tail nnieh longer than the wing. Bill 

 short and stout, the depth about two-thirds the length of the 

 ex[)osed culnien, The wing, which is rounded, has the fifth 

 primary longest. The tail is also rounded and much gradu- 

 ated, 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. 



Type, J/, leachi (Such). 



Feederickena, gen, nov. 



The species which I propose to separate as a new genus 

 under the above title has also been previously placed in the 

 genus Thamnophi/usj Vieiliot, with which it has no near 

 affinity; it may be characterized by the absence of a concealed 

 white dorsal patch. The nuchal crest is composed of rather 

 broad feathers with rounded tips. Tlie bill is short and stout, 

 the depth being equal to about one-half the length of the 

 exposed culmen. The wing is rounded, the fourth, fifth, and 

 sixth primaries longest and subequal ; the seventh is longer 

 than the thiid, but shorter than the fourth. The tail, which is 

 rounded and graduated, is about two-thirds the length of the 

 wing. The male is almost unifoim in colour, but the female 

 has the tail and entire under surface barred. 



Type, Thamnophilus viridis, Vieiliot. 



PiCiiOTES, nom. nov., pro Lochites, Cab. & Hein. 1859 

 (nee Gistel, 1848). 



Type, Lanius severus, Licht. 



SakeSPHORUS, nom. nov., pro Hypolophus, Cab. & Hein. 

 1859 (nee MuUer & Henle, 1837). 



Type, Lanius canadensis, Linn. 



