596 



NATURALIST'S GUIDE TO THE AMERICAS 



pp. I-XII, 1-160, Mexico, 

 1902. (A valuable list of 

 scientific and common names.) 



Elliot, Daniel Giraud. 



1904. The Land and Sea Mammals 

 of Middle America and the 

 West Indies. Pub. Field Co- 

 lumb. Mus., Zool. Ser., vol. 

 IV, pts. 1-2, pp. 1-850. Chi- 

 cago, 1904. (Contains list 

 of species with original ref- 

 erences, brief descriptions, 

 type localities, and geographic 

 distribution.) 



Mearns, Edgar Alexander. 



1907. Mammals of the Mexican Bound- 

 ary of the United States: 

 A Descriptive Catalogue of the 

 Species of Mammals Occurring 

 in that Region ; with a General 

 Summary of the Natural His- 

 tory, and a list of trees. 

 Bull. 56, U. S. Nat. Mus., pt. 1 

 (part 2 unpublished). Families 

 Didelphiidae to Muridae, pp. 

 1-530, pis. I-XIII, text figs. 

 1-126. (An important, but 

 unfortunately uncompleted 

 work on the mammals of the 

 region.) 



Miller, Gerrit S., Jr. 



1912. List of North American Land 

 Mammals in the United States 

 National Museum, 1911, pp. 

 I-XIV, 1-455, 1912. (An au- 

 thoritative systematic list of 

 currently recognized North 

 American species at the end 

 of the year 1911, with refer- 

 ences to original descriptions; 

 type localities are given and 

 in some instances geographic 

 ranges. It is understood that 

 a new edition of this im- 

 portant work will soon be 

 issued.) 



Nelson, Edward W. 



1918. Wild Animals of North America. 

 Combining in one volume 

 text and illustrations of two 

 numbers of National Geo- 

 graphic Magazine — that of 

 November, 1916 devoted to the 

 "Larger Mammals of North 

 America, and that of May, 

 1918 entitled the "Smaller 

 Mammals of North America." 

 (Includes accounts of many 

 Mexican species.) 



Pilsbry, Henry A. 



Various papers in the Proc. Phil. 

 Acad. Nat. Sci., 1891-1920, 

 on the Mollusca of Mexico, 

 including description of new 

 family and species and eco- 

 logical notes. 



Standley, Paul C. 



1920-1923. Trees and Shrubs of Mex- 

 ico. Contrib. U. S. Nat. 

 Herb., vol. 23, pts. 1-3, pp. 

 1-848 (have been issued). 

 Parti. Gleicheniaceae-Betu- 

 laceae (1920). Part 2. Fa- 

 gaceae-Fabaceas (1922). Part 

 3. Oxalidaceae-Turneraceae 

 (1923). (A valuable descrip- 

 tive and distributional list.) 

 Nelson, Edward W. 



1921. Lower California and its Natural 

 Resources. Mem. Nat. Acad. 

 Sci., vol. XVI, pp. 1-194. 

 pis. 1-35. Washington: Govt. 

 Printing Office, 1921. (Includes 

 detailed accounts of life areas. ) 



2. GUATEMALA 

 By Wilson Popenoe 



In Guatemala, as in Mexico and 

 several other tropical American coun- 

 tries, three climatic zones are popularly 

 recognized. These are the tierra ca- 

 liente (hot region), in Guatemala ex- 

 tending from sea level to an altitude of 

 about 2000 ft. ; the tierra templada 

 (temperate region), comprising the ter- 

 ritory between 2000 and 6500 ft. ; and the 

 tierra fria (cold region) which extends 

 from 0500 ft. to the upper limit of culti- 

 vation, about 10,000 ft. 



For the purposes of the present work 

 it is more useful to consider Guatemala 

 as comprising the following regions: 

 (1) the Pacific littoral; (2) the volcanic 

 mountains which rise from the northern 

 edge of the coastal plain; (3) the plateau 

 region, known locally as Los Altos, 

 which extends from the volcanic range 

 northward the eastward past 'the geo- 

 graphic center of the country; (4) the 

 moist mountainous Vera Paz region; 

 (5) the semi-arid valley of the upper 

 Motagua River; and (6) the moist 

 lowlands of the Atlantic Coast, together 

 with the great plain of Peten which 

 comprises about one-third of the whole 

 area of Guatemala. 



1. The coastal plain on the Pacific 

 side of Guatemala averages about 50 

 mi. in width. At the base of the sierra, 

 whence it slopes uniformly to the sea, 

 it has an elevation of 1000 to 2000 ft. 



