LETTER OF SUBMITTAL. 
U. S. Department of Agriculture, 
Division of Entomology, 
Washington, D. C, November 28, 1890. 
Sir : I have the honor to submit for publication Bulletin Xo. 7, on 
the Pediculi and Mallophaga affecting man and the lower animals, by 
Prof. Herbert Osborn, the Iowa agent of the Division. 
In explanation of the numbering of this bulletin it is necessary to 
state that Bulletin Xo. 7 was originally intended to cover a monograph 
by myself of the genus Acronycta, a genus of Noctuidse popularly 
known as "daggers," and the larvae of which are, many of them, quite 
destructive to forest trees. The manuscript and figures of this mono- 
graph have been, for the most part, prepared for several years, and I 
have hoped each year to be able to put them in the printers bands; 
but more urgent divisional work has caused continued postponement, 
and in order to avoid the hiatus which the delay has caused in the 
series of special bulletins I have deemed it best to call the present bul- 
letin Ko. 7. 
Respectfully, 
C. V. Riley, 
Entomologist, 
Hon. J. M. Rusk, 
Secretary of Agriculture. 
