LETTER OF TRANSMITTAL, 



TJ. S. Department of Agriculture, 



Washington, D. C, December 28, 1892. 

 Sir : I have the honor to transmit herewith the manuscript of North 

 American Fauna, No. 7, consisting of Part n of the report on the results 

 of the Death Yalley Expedition, a biological survey of southern Cali- 

 fornia, southern Nevada, and parts of Utah and Arizona, carried on by 

 your authority in 1891. It consists of the special reports on birds, rep- 

 tiles, batrachians, fishes, molluscs, insects, and the desert shrubs, cac- 

 tuses, and yuccas, and is accompanied by a list of localities. 



Part I, comprising the general report (itinerary, description of the 

 region, and discussion of life zones) and the report on mammals, is not 

 yet ready for the press. 



Respectfully, 



C. Hart Merriam, 

 Chief of Division of 



Ornithology and Mammalogy. 

 Hon. J. M. Rusk, 



Secretary of Agriculture. 



