86 BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



Other plants collected are: 



Belaginella rupcstris (Linnreus) 



Spring. 

 Vsnea barbata (Liuiifneus) Fries. 

 Nolina texana Watson. 



Foiiqidcria splendcns Engelmann. 

 Pctela baldiDmii Torrey and Gray. 

 Cactus dasyacantJius Engfelmann. 

 Cereiis rcemcri Muhlenpfort. 



Nolina lindheimeriana (Scheele) Wat- Opuntia (Platopuntia and Cylindro- 



son. 

 DasylirioH sp. 



Eriogomini cwspitosuDi Nuttall. 

 Fendlera nipicola Engelmann and 



Gray. 



piaitia, several species of each). 

 Garrj/a irrit/litii Torrey. 

 AnisacantJiH.s thiirhcri Gray. 



Station No. 13. — Mosquito Springs, Chihuahua, Mexico. These 

 large springs, called " Ojos de los Mosquitos " by the Mexicans, and 

 commonly known as " Mesquite Springs " to the Americans, are 

 situated 2 kilometers (1.25 miles) east of Monument No, 46, at an alti- 

 tude of 1,270 meters (4,170 feet), in a broad valley between the Boca 

 Grande and Hachita mountains. They mark the western border of 

 the Eastern Desert Tract. The lowest part of the vallej^ is a smooth 

 alkali flat, but the edges are covered with grass, mesquite, and shrub- 

 bery. As water is abundant, mammals and birds are plentiful in the 

 neighborhood of the springs. Mr. Holzner occupied this station 

 from May 10 to 18, 1892; the writer, May 15 to 18, and 19 to 21, 1892. 



The trees in the neighborhood are the desert yucca, devils claws, 

 mesquite, Kceher'linia, and desert willow. Cacti are abundant. 

 Among those seen were arborescent opuntias, prickly pears {Opun- 

 tia Undheimeri Engelmann, O. filipendula Engelmann, and others). 

 At the spring grew the aquatic Anernojjsis califormca (Nuttall) 

 Hooker and Arnott; the neighboring plains were covered, in places, 

 Avith the tai^ioca {Jatropha 7)iacrorrhiza Bentham), and toward the 

 foothills, in which the " ocotillo,"' mimosas, acacia, and low yuccas 

 were abundant, were broad slopes occupied exclu'^ively by the creo- 

 sote bush {Covillea tridentaUt) . Many flowerin"- plants gave at- 

 tractiveness to the scenery. 



Station No. 14.^ — Lower Corner Monument (No. 53), at the east 

 end of the boundary parallel 31° 20', and the south end of meridian 

 108° 12' 30". (See Map, frontispiece.) Altitude, 1,408 meters (4,620 

 feet). Distance from the Kio Grande, measured on the Boundary 

 Line, 209 kilometers (130 miles). No camp was made here, but the 

 locality was frequently visited from a neighboring camp at Dog 

 Spring. The locality is of interest because of its proximity to Espia, 

 on the Corralitos River, Chihuahua, where the naturalists of the old 

 Mexican Boundary Survey, under Major Emory, made valuable col- 

 lections in zoology and botany. The most abundant plants are the 

 Dasylirion^ Nolina^ and cat's claws {Mimosa hiuncifera Bentham 

 and 31. Undheimeri Gray). Here aac first saw the rainbow cactus 



