﻿8 



NORTH AMERICAN FAUNA. 



[No. 10. 



In 1895 Allen described two small species from Gosta Eica: Blarina 

 (Soriciscus) oiigrescens, and Blarina (Soricismis) orophila. 



Thus to the present time 8 valid species have been described, 3 

 from the United States (brevicauda, carolinensiSj and parva), 2 from 

 Mexico (herlandieri and mexicana), 1 from Guatemala {micrura = tro])i- 

 calis) and 2 from Costa Eica. Twelve new forms are here added (1 from 

 Dismal Swamp, Yirginia, 2 from Florida, and 9 from Mexico), making 

 20 members of the genus now known. These, with their type localities, 

 are as follows : 



LIST OF SPECIES A2>D SUBSPECIES OF BLARIXA. 



Subgenus Blarina: 



Blarina 'brevicauda (Say) Blair, Nebraska. 



carolinensis (Bach.) Eastern South Carolina. 



caroJinensis jjeJiiwsMZce nov. . . Miami, Florida. 



ieJmaJestes sp. nov Dismal Swamp, Virginia. 



Subgenus Cryptotis : 



*Blarina parra (Say) Blair, Nebraska. 



floridana 8]).TioY Canaveral, Florida. 



lerlandieri Baird Matamoras, Mexico. 



iropicalis nom. nov Coban, Guatemala. 



soricina sp. nov Tlalpam, Valley of Mexico. 



ohscura sp. nov Tulancingo, Hidalgo, Jiexico. 



mexicana Baird Jalapa, Vera Cruz, Mexico. 



mexicanagoJdmani&vihs^.nox . Mts. near Chilpanciu go, Guerrero, Mexico. 



mexicana peregrina BVibs^ .Tio\ . Mountains near Oaxaca, Oaxaca, Mexico. 



mexicana machetes subs23. nov. Mountains near Ozolotepec, Oaxaca, Mex. 



neJsoni sj). nov Volcano of Tuxtla, Vera Cruz, Mexico. 



fossor sp. nov Mount Zempoaltepec, Oaxaca, Mexico. 



alticola sp. nov Mount Popocatapetl, Mexico. 



magna sp. nov Totoutepec, Oaxaca, Mexico. 



nigrescens Allen San Isidro, San Jose, Costa Rica. 



orophila Allen Volcano of Irazn, Costa Rica. 



GeograpMc distribution. — The genus Blarina is confined to i^'orth 

 America, where it ranges from the mountains of Central America north- 

 ward to the southern border of the Boreal zone in Canada. It attains 

 its highest development in the mountains of southern. Mexico — the 

 same region in which the famil}^ Geomyidie is represented by so large a 

 number of species and genera.^ Although several of the species now 

 inhabit the boreal summits of mountains, and one is restricted to the 

 Tropical belt, the genus as a whole is clearly of Austral origin. In 

 the course of time, groups having their centers of distribution in par- 

 ticular areas or zones often overflow into adjacent zones, and it is not 

 unusual for tropical and austral types in the neighborhood of high 

 mountains to push up the slopes of these mountains and become 

 acclimated. Such forms commonly undergo a degree of modification 

 sufficient to admit of their ready recognition as distinct species or 

 subspecies. Thus Blarina soricina^ from an altitude of 7,600 feet in the 



^ See Monograph of the Geomyidne, X. Am. Fauna^ Xo. 8, Jan., 1895. 



