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LETTER OF TRANSMITTAL 



Office of the State Entomologist, 

 Fort Collins, Colorado, January 1, 1918. 



Sir: 1 have the honor to transmit for publication, as Cireulai* 

 No. 25, Rodents of Colorado in Their Economic Relation. 



As you are aware, I have been engaged for some time past in 

 work, under your direction, on the control of rodents found in the 

 State that are known to be injurious to agricultural crops. 



A number of circulars on the individual species of these mam- 

 mals have been published from this office, but none treating on the 

 subject as a whole. In this publication each species known to occui 

 in the state is listed, and the genus, at least, is treated economically, 

 and in some cases the species. 



While working' on the control of rodents, the data for this 

 circular has been gathered from time to time, and the results of 

 these studies are herewith submitted for your approval. 



Respectfully, 



W. L. BURNETT, 



Deputy Ffst Inspector. 



To C. P. Gillette, 



State Entomologist. 



