LETTER OF TRANSMITTAL 



U. S. Department of Agriculture, 



Bureau of Entomology, 

 Washington, D. C, July 25, 1910. 

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

 first part of a bulletin of the technical series to be entitled "Technical 

 Papers on Miscellaneous Forest Insects. I. Contributions Toward 

 a Monograph of the Bark- weevils of the Genus Pissodes," by Dr. 

 A. D. Hopkins. Although the bark- weevils are among the most 

 important eAemies of coniferous forest trees, and especially of the 

 young growth, comparatively little has been known heretofore of 

 the species; hence the special need for this contribution as a basis 

 for economic investigations and publications. It embodies the 

 results of extensive systematic work by Doctor Hopkins on new mate- 

 rial contained in the collections of the Bureau of Entomology and 

 the United States National Museum and includes the descriptions of 

 twenty- three species new to science. 



I recommend the publication of this manuscript as Technical 

 Series No. 20, Part I, of the Bureau of Entomology. 

 Respectfully, 



L. O. Howard, 

 Entomologist and Chief of Bureau. 

 Hon. James Wilson, 



Secretary of Agriculture. 



Ill 



