72 BULLETIN 15 4, UNITED STATES NATIONAL MUSEUM 



Range. — The Mexican race-runner is apparently confined to the 

 mainland of Mexico and occurs along the Gulf coast of Vera Cruz, 

 throughout the region of the Isthmus of Tehuantepee, and along the 

 Pacific coast from Chiapas to Michoacan. Its detailed distribution 

 follows alphabetically by states : 



CHIAPAS.— (Toyl^/Zr/, U.S.N.M.; Mountains near- Tonala, 

 U.S.N.M.). 



GUERRERO.— (J «/y^Wr^, U.S.N.M., A.M.N.H.; Ayutla, Gadow, 

 190C, p. 309; ChUpancingo, Gadow, 1906, p. 309; Cocoijul, Gadow, 

 190G, p. 309; Los Cajones, Gadow, 1906, p. 309; Tierra Colorado. 

 Gadow, 1906, p. 309; Totolapan, Gadow, 19056, p. 195). 



MICHOACAN.— (^Zi;«ra^o, M.C.Z., Mich.). 



O'XAC^^.—iChacalpa, A.M.N.H.; Chivcla, A.M.N.H., M.C.Z.; 

 MixtequiUo, A.M.N.H., C.A.S.; Mountain, Giengda, A.M.N.H.; 

 Oaxaca, M.V.Z.U.C; /S'«f/am, AM.N.H.; Salina Cruz, Gadow, 1906, 

 p. 309; Salina Cruz Cemetavj/, A.M.N.H. ; West Salina Cruz, 

 A.M.N.H.; San Geronimo, A.M.N.H., F.M.N.H.; San Luis AUende, 

 Gadow, 1906, p. 309; San Mateo del Mar, Gaclow, 1906, p. 309; 

 Santiago Astata, A.M.N.H.; Santo Domingo, Boettger, 1893, p. 75; 

 Tapanatepec, M.C.Z. ; Tehuantepee, U.S.N.M. ; 3 miles north of 

 Tehuantepee, A.M.N.H.; West Tehuantepee, Cope, 1887, p. 93; 

 Tequesixtlan, Gaclow, 1906, p. 309). 



VERA Q^'\JZ.— {Coatzaeoalcos Bay, U.S.N.M.; El Potrero, 

 M.C.Z. ; Jalapa, Cope, 1887, p. 44, M.C.Z. ; La Antigua, Ruthven, 

 19125, p. 231, F.M.N.H.; Orizaba, Cope, 1887, p. 44; Ofopa, Ruthven, 

 1912Z>, 231, F.M.N.H.; Pei-ez, Ruthven 19126, p. 231, F.M.N.H.; Bio 

 Blanco, Ruthven, 19126, p. 231, F.M.N.H.; San Francisco, F.M.N.H.; 

 Vera Cruz, Cope, 1887, p. 44, A.M.N.H., C.A.S., A.N.S.P.). 



Hahitat and, hahifs. — Very little is known of the liabitat of this 

 form and apparently nothing has been published concerning its 

 habits. According to Gadow (1906. p. 277), ''Guff at us does not 

 leave the Tierra Galiente above the 3,000 feet level. Greater heights 

 are an absolute barrier." He (p. 325) considered the spotted phase 

 as characteristic of the " open forests with dense undergrowth, or 

 similar pitches of woodland, in the State of Vera Cruz and its 

 confines with those of Oaxaca." That is, in the Atlantic Tierra 

 Caliente, " with its decidedly denser vegetation, with fewer decid- 

 uous trees and much greater rainfall," the " tj^Dical " spotted phase 

 occurs. It was stated (p, 326) that the striped lizards prevail in 

 the small open localities, and that " much tangled underbrush, 

 broken terrain, well-wooded ravines, or meadows with tall grass and 

 herbs, or rivers fringed with masses of shrubs," were the features of 

 the spots that yielded the most intermediate specimens. 



