TITYEA.— HADEOSTOMUS. 121 



also from the Amazons valley. Its range in altitude is also restricted to a lower level, 

 which probably does not exceed 1500 feet, the approximate altitude of Choctum in 

 Guatemala. 



Very little is recorded of its habits. Mr. Nutting ^^ says that it is common at La 

 Palma in Costa Rica, and is usually found in rather open country associating in flocks, 

 of six or eight, and that it is noisy and quarrelsome. 



HADEOSTOMUS. 



Hadrostomus, Cabanis & Heine, Mus. Hein. ii. p. 84 (1859) ; Scl. Cat. Birds Brit. Mus. xiv. p. 333.. 



Five species are included in the genus Hadrostomus, which range from Northern 

 Mexico to Southern Brazil, one species, H. aglaioe, even passing beyond these limits 

 into Southern Arizona. 



Two species only are found within our borders, the widely spread and variable 

 H. aglaicB and H. homochrous, and these appear to be not very definitely separable. 



Though very similar in structure to Pachyrhamphus, with which it was long united,. 

 Hadrostomus is a fairly natural genus, being composed of birds of larger size and 

 stouter build. The bill is larger in proportion, and the colours of the plumage more 

 uniform and devoid of definite pattern. The males are grey or blackish, the females 

 more or less rufous. 



1. Hadrostomus aglaise. 



Pachyrhynchus aglaim, Lafr. Rev. Zool. 1839, p. 98 \ 



Psaris aglaiee, Kaup, P. Z. S. 1851, p. 46^. 



Pachyrhamphus aglaim, Scl. P. Z. S. 1856, p. 297 'j Scl. & Salv. Ibis, 1859, p. 124*; Owen, Ibis, 



1861, p. 64 ^ 

 Platypsaris aglaim, Scl. P. Z. S. 1859, p. 285 °; Sumichrast, Mem. Bost. Soc. N. H. i. p. 558''; 



Ridgw. Man. N. Am. B. p. 240'. 

 Hadrostomus aglaim. Cab. & Heine, Mus. Hein. ii. p. 85'; Cab. J. f. Orn. 1861, p. 252"; Scl. 



P. Z. S. 1864, p. 176 " ; Cat. Birds Brit. Mus. xiv. p. 335 " ; Lawr. Ann. Lye. N. Y. ix. 



pp. 116", 204"; Bull. U. S. Nat. Mus. no. 4. p. 28'=; Prantz. J. f. Orn. 1869, p. 309"; 



Scl. & Salv. P. Z. S. 1870, p. 837'"; Grays. Pr. Bost. Soc. N. H. xiv. p. 279''; Ferrari- 

 Perez, Pr. U. S. Nat. Mus. ix. p. 156 ''. 

 Platypsaris affinis, EUiot, Ibis, 1859, p. 394'°; Scl. P. Z. S. 1859, p. 366 2'; Sumichrast, Mem. 



Bost. Soc. N. H. i. p. 558 '^ 

 Hadrostomus aglaim, var. affinis, Lawr. Mem. Bost. Soc. N. H. ii. p. 289". 

 Pachyrhamphus latirostris, Bp. Compt. Rend, xxxviii. p. 658 " ; Not. Orn. p. 87 '= ; Scl. P. Z. S, 



1857, p. 74 '^ 

 Hadrostomus latirostris, Nutting, Pr. U. S. Nat. Mus. vi. p. 393 ". 

 Platypsaris latirostris, Ridgw. Man. N. Am. B. p. 240 ^'. 

 Hadrostomus albiventris, Lawr. Mem. Bost. Soc. N. H. ii. p. 289"; Scl. Cat. Birds Brit. Mus. xiv. 



p. 335 '". 

 BIOL. CENTK.-AMBR., Aves, Vol. II., December 1890. 16 



