STUDIES OF MEXICAN AKD CENTRAL AMEWCAN 



J 



ANTS -NO. f). 



a 



Bv J. N. llosK. 



INTRODUCTORY NOTES. 



The following studios consist larg('l\ of descriptions of new species 

 from the rich oleanino-y of Dr. C. Ci. Priiip-le and Dr. K. Pahiier, and 

 of various Government collectors. Of the latter, jMcssi-s. E. W. Nelson 

 and E. A. Goldman continue year after year to send In large a(;ccs:sions. 

 Very large amounts of nisiterial have also been obtained by myself and 

 assistants, aggregating now more than 10,000 num1)ers. 



On May 15, 11)05, I was authorized l)y the Assistant Secretary of 

 the Smithsonian Institution to proceed to Mexico for the purpose of 

 making botanical explorations, this being my fifth commission of the 

 kind. Mr. Jos. II. Painter, also of the National Museum, was for 

 the second time sent with me, and his previous experience, together 

 with his enthusiasm for botanicid exploration, added greatly to the 

 success of the expedition. My son, Joseph S. Rose, accompanied us 

 as a private assistant. The City of Mexico was made our principal 



base, and thither we returned repeatedly during the season. We 

 made short trips thence to Tialpam, San Angel, Santa Fe, Guadalupe, 

 TIalnepantIa, and the Hacienda de la P^ncarnacion, all in the Valley 

 of Mexico; also longer trips to Cuernavaca and Yautepec in Morelos, 

 to Tula, Pachuca, Somoriel, and Tulancingo in Hidalgo, and to Iguala 

 in Guerrero. With Ixmiquilpan, Hidalgo, as a base, work was done on 

 tlic neighboring mountains and plains, und a side trip was taken to the 

 Sierra de la Mesa, some 20 miles to the cast AVith San Juan del Kio 

 as a base, a trip was made through the cactus deserts of Queretaro. 

 With Tehuacan, Puel)la, as a base, a considerable amount of work was 

 done on the plains and mountains about that town, whence, also, side 

 trips were made to Tomcllin and San Sebastian. 



« Continued from Vol. Mil, p. 339, of the Contrihutions. 



79 



