LETTER OF TRANSMITTAL. 
United States Department of Agriculture, 
Division of Entomology, 
Washington, I). C, February 25, 1X96. 
Sir : I have the honor to submit for publication the third number of 
the technical series of bulletins of this Division. It has been prepared 
by my first assistant, Mr. C. L. Marlatt, and consists of a monographic 
revision ' of the Nematime, an important subfamily of leaf-feeding 
hymenopterous insects of the family Tenthredinidra. The larva? of 
these insects are all plant-feeders and include among their number 
some very important enemies of cultivated plants. They represent, 
economically, the most important group of the family to which they 
belong. 
Respectfully, L. O. Howard, 
Entomologist. 
Hon. J. Sterling Morton, 
Secretary of Agriculture. 
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