LACEBUGS OF THE WORLD 21 



U.S. National Museum, Division of Philately and Postal History, for 

 assistance with geographical problems. 



For the fine illustrations we are indebted to Elsie Froeschner and Caroline 

 Lutz, both of Arlington, Va.; Maria Lisa Biganzoli and Elinor Stromberg, 

 both of Washington, D.C.; Patricia and Robert Hogue, Alexandria, Va.; 

 and to Arthur Smith, British Museum (Natural History), London. 



Special acknowledgment is also due to Emily Bennett and Ruth Blanchard 

 and the staff of the Smithsonian Institution Library for assistance in locating 

 and obtaining sources of references; and for translations of papers in foreign 

 languages, we are indebted to the late Ruth Ericson, translator, U.S. 

 Department of Agriculture. Mr. John S. Lea and Mrs. Mary M. Ingraham, 

 of the Smithsonian editorial staff, have been most cooperative and helpful 

 with suggestions on format and in seeing the manuscript through the press. 



This work was supported in part by National Science Foundation Grant 

 18721. 



