5. cATHARtrs, 287 



The Black-headed Central- Americau Thrush-Robin is a resident 

 of the forests of >Soiith Mexico, Guatemala, Costa Kica, and Panama, 

 and is said to rarely ascend more than 3000 feet above the level of 

 the sea. 



a. Ad. sk, Guatemala. J. Gould, Esq, 



[Catharus griseiceps and Catharus phaeopleurus.] 



These two forms are very closely allied, but may perhaps be fairly 

 entitled to specific rank, as, so far as we know at present, the 

 slight differences between them are coincident with slight variation 

 of geographical distribution. The Panama form has theback russet- 

 brown, and the Colombian form olive-brown. 



4. Catharus griseiceps. 



Catharus griseiceps, Sci/rin, P. Z. S. 18G6, p. 68, 1867, p. 1.32, and 

 1870, p. 179; Sclat. (!(• .Salt: Nomencl. Av. Keotr. p. 1 (1873); 

 Sale. 6,- Godm. Biol. Centr.-Amer. Zooh, Aves, i, p. 6, pi. i. fie- 2 

 (1879). > f ! t 6 



- Turdus giiseiceps (.S'«/r.), Graij, Hand-l. B. i. p. 259. no. 3777 (1869), 



In the aduU male the head, nape, and lores are brownish slate- 

 grey ; the rest of the upper parts are almost unit'oim russet-brown; 

 inner Webs of quills brown. Underparts, including the axillaries and 

 under wing-coverts, palish slate-grey, shading into nearly white on 

 the centre of the belly and under tail-ccverts : inner margin of quills 

 pale brown. Bill yellow. Wings with the fourth and fifth primaries 

 nearly equal and longest, second laimary intermediate in length 

 between the eighth and ninth, bastard primary M to 0-!'o inch, 

 about half the length of the second. Legs, feet, and claws yellow! 

 Length of wing 3-35 to 3-0 inches, tail 2-0 to 2-4, culmen O-?"' to 

 0-65, tarsus 1-25 to 1-2. 



In the/;-m«Zi' the slate-grey of the head is rejdnced by dark russet- 

 brown. Males of the yicir probably resemble the female. Yoiniy in 

 first plumage arc unknown. 



The Panama Tbrush-Kobin has only been obtained from the 

 highlands ot Panama, where it is a resident. 



a. S ad. sk. Veragua {Arce). II. Seebohm, Esq. [P.]. 



5. Catharus phaeopleurus. 



Catharus pliajopleuius, Sdat. (^- Salv. P. Z. S. Is7.1, p. r,4l, and 1879 

 p. 491, ' 



In the aduJt male and f(i»ah the general colour of the upper 

 parts is olive-brown, shading into slate-grey on the head, and into 

 russet-brown on the upper tail-eoverts ; the feathers of the head are 

 obscurely suffused with olive-brown on their margins, and those of 

 the back have obscure margins of paler olive-brown ; lores dark 



