302 PROCEEDINGS OP THE ACADEMY OP 



region considerably beyond the latitude of San Francisco. But a single species 

 ( Garzetta thula, ) belongs to the South American fauna ; and this may not be 

 the same bird as the Chilian. 



One of the most striking facts of all is that not a single land animal has 

 been identified as found in Mexico and not in the United States also. Not 

 a single bird of the Western Tierra Caliente of Mexico has been yet met with, 

 however abundant it may be on the opposite side of the gulf, not much over a 

 hundred miles across. 



The case, however, is quite different with the marine invertebrates, whicb, 

 as might be expected, are very closely related to those of Western Mexico. 

 The accompanying note* from Mr. Stimpson will illustrate the character of 

 the Crustacea of the Cape. 



List of Birds collected from the middle of April to the middle of July, 1859. 



1. TiNNtracDLUs sparverius, Vieillot. 



2. Bubo virginianus, Bonaparte. 



3. Picus lucasanus, Xantus. This species is intermediate in character be- 

 tween P. scalaris and P. nuttalli, resembling them very closely, and belonging 

 to the same division of the genus. It has the brown feathers on the nostrils, 

 the whole top of the head spotted with red, and the predominance of white 

 on the cheeks of the former, and the deficiency of black bars in the white of 

 the tail feathers of the latter ; the black bars, except at the tip, not crossing 

 the outer web, and the outer web of the third feather being almost entirely 

 white. The bill and feet, the latter especially, are very stout and large, much 

 more so than in the others, in nuttalli, especially. In size, it is about inter- 

 mediate between the other two. 



4. Centurus uropygialis, Baird. As in the other woodpeckers, the speci- 

 mens of this species have a peculiar weather-beaten and dull appearance. 



5. Colaptes chrysoides, Malherbe. This bird is only known from an im- 

 perfect description by Malherbe of a single female specimen, and this author 

 was ignorant of the peculiar feature of the male of this species, namely, in it 

 combining the characters of both C. auratus and mexicanus. Thus, with ashy 

 throat and cheeks, and broad, red moustache and absence of nuchal red of the 

 latter, the shafts and under surface of the wing and tail are gamboge yellow, 

 as in C. auratus. The tail feathers are more tipped with black than in either 

 species, the outer being of this color for more than the terminal inch, and 

 along most of the outer web. The jugular collar and the spots on the breast 

 are considerably larger than in the other species. The top of the head is 

 light yellowish brown. In size, this species is considerably inferior to that of 

 C. auratus. 



C. mexicanoides of Lafresnaye has the shafts red. 



In the Report on birds of Pacific R. R., Series IX. p. 125, I refer to a 

 female Colaptes, collected by Mr. Schott, on the line of the Mexican boundary 

 survey, as possibly of this species. This proves now to be the fact, and ex- 

 tends the range of the species to the valley of the Gila River. The following 



* More than sixty species of Crustacea have already been collected by Mr. Xantus, 

 more than half of which are new. They belong to the genera Pisa, Thoe, Micippa, Milkrax, 

 Pericera, Lambrus, Alergatis, Xantthus, Pilumnus, Ozius, Eriphia, Ocypode, Grapsus, 

 Pachygrapsus, Nautilograpsus, Calappa, Dromidia, Pctrolisthes, Remipes, Albunea, 

 Lepidops, Cwnobita, Calcinus, Eupagurus, Alpheus, Palcemon, Livoneca, Ligea, Orchestia, 

 Hyperia, and several new ones. This new and rich Carcinological Fauna differs entirely 

 from that of the Upper Californian Coast, not a single species being identical, and approxi- 

 mates more nearly to that of the Western coast of Mexico, from Guaymas to Acapulco ; 

 also in some degree to that of the Gallapagos Islands. Nearly all of the species described 

 by De Saussure as inhabiting the Bay of Mazatlan, (Rev. et Mag, de Zoologie v. 354-368), 

 have been found by Mr. Xantus at Cape St. Lucas. 



[N. 



ov. 



