190 Todd, The Genus Eupsychortyx. [April 



The American Museum of Natural History, the U. S. National 

 Museum, the Museum of Comparative Zoology, the Museum of 

 the Brooklyn Institute, the Academy of Natural Sciences of 

 Philadelphia, and Mr. James H. Fleming, of Toronto, Ontario, 

 for favors extended. No less than one hundred and ninety-two 

 specimens have been examined, including considerable typical 

 and topotypical material, and a representation of all the known 

 forms. My acknowledgments are also due to Mr. George M. 

 Sutton for the very excellent painting which forms the basis of 

 the plate which accompanies this paper, and for plotting both of 

 the maps illustrating the distribution of the various forms. None 

 of the references appearing in the paper have been taken at second- 

 hand, and I have to thank Mr. E. W. Nelson, Dr. Harry C. Ober- 

 holser, and Dr. Charles W. Richmond for verifying a few of those 

 here quoted. All measurements are in millimeters, and the length 

 of the bill is that of the exposed culmen. Free use has been made 

 of Mr. Ridgway's ' Color Standards and Color Nomenclature' 

 in preparing descriptions. 



Genus Eupsychortyx Gould. 



Eupsychortyx Gould, Mon. Odontophorinse, 1850, 15 (diag.; list of species; 

 no type designated). — Gray, Cat. Genera and Subgenera Birds, 1855, 

 107 (Tetrao cristatus Linnaeus designated as type). — Gray, Hand- 

 List Birds, II, 1870, 273 (list of species).— Giebel, Thes. Orn., II, 

 1875, 141 (diag.; list of species). — Waterhouse, Index Genera Avium, 

 1889, 78 (ref. orig. diag.).— Ogilvie-Grant, Cat. Birds Brit. Mus., 

 XXII, 1893, 99, 407 (diag.; E. leucopogon given as type). — Sharpe, 

 Hand-List Birds, I, 1899, 45 (list of species). — Dubois, Syn. Avium, 

 II, 1907, 819 (list of species). — Salvin and Godman, Biol. Centr.-Am., 

 Aves, III, 1903, 295 (diag.; references). — Knowlton, Birds of the 

 World, 1909, 296 (range) .—Chapman, Bull. Am. Mus. Nat. Hist., 

 XXXVI, 1917, 173, in text (crit.). 



Eupsichortyx (emendation) Bonaparte, Compt. Rend., XLII, 1856, 883 

 (list of species). 



The first species of this group to receive a binomial name was 

 the Tetrao cristatus of Linnseus, 1766, based on Brisson. Curi- 

 ously enough, the true habitat of this form remained unknown 



