202 Mr. 0. Salvin on the Ornithology of Guatemala . 
Atlantic coast-region; and in the same way, though hardly to 
the same extent, Alta Vera Paz merges into the highlands of 
the Cordillera. Hence we see that altitude and consequent 
decrease of temperature is the primary cause for separating the 
ornithic life of Guatemala into two principal divisions. The 
minor divisions are chiefly the result of different causes, and de¬ 
pend on vegetation and consequent abundance or scarcity of food. 
Again referring to the Pacific coast-region, it is worthy of 
remark that only two or three peculiar species are found repre¬ 
senting other closely allied species on the Atlantic side, and that 
the difference is most strongly shown by the absence of many 
genera common in the corresponding eastern region. To show 
clearly how these results have been arrived at, it would be 
necessary to compare the numbers in some tabular form; but as 
this would enlarge the subject beyond my present intention, 
which is simply to correct errors, I leave it for another oppor¬ 
tunity. 
1859, p. 5. Turdus grayii , Bp. Not confined to districts of up¬ 
wards of 4000 feet of elevation, but found throughout 
the lowlands and as far southward as Panama. 
,, p. 7. Mimus gracilis , Cab. Very rare on the tablelands, 
and, as far as I am aware, never occurs on the Pacific 
side. 
,, p. 8. Campy lor hynchus capistratus , nobis nec Less. Be¬ 
lize specimens probably belong to C. rufinucha ( vide 
supra). The true C. capistratus is common on the 
Pacific side. 
„ p. 9. Troglodytes aedon , nobis (nec Vieill.) = T. interme- 
dius , Cab., T. hypaedon , Scl. 
,, p. 9. Polioptila mexicana (Bp.). Now considered by Dr. 
Baird to be identical with the northern P. ccerulea (L.). 
(See Bev. Am. B. part i. p. 74.) 
,, p. 12. Icteria velasquezi, Bp. Now considered the same 
as I. virens, L. (See Baird, Bev. Am. B. part i. p. 228.) 
,, p. 12. Vireosylviaphiladelphica, nobis (nec Cassin) = V. co - 
hanensis , Scl. P. Z. S. 1860, p. 463. 
