iQoS] Catalogue of the Genus Alaptus 195 



ACKNOWLEDGMENTS. 



It gives me pleasure to acknowledge the kind assistance of 

 Dr. Henry Skinner, of the Academy of Natural Sciences, Phila- 

 delphia, Pa.; that of Mr. C. R. Crosby, of Cornell University, 

 Department of Entomology; and that of Mr. Charles T. Brues, 

 Curator of Invertebrate Zoology, Milwaukee' Public Museum. 

 I wish to thank these gentlemen especially for furnishing abstracts 

 of the literature. 



I am particularly indebted to Dr. L. O. Howard, Chief of the 

 Bureau of Entomology, U. S. Department of Agriculture, for the 

 specimens upon which the descriptions in this paper are based, 

 and for the opportunity of studying a large series of Euro- 

 pean Mymaridae, besides many other kindnesses. 



For the figure of the antenna of Alaptus minimus Walker, I 

 am indebted to Mr. J. D. Hood, of the University of Illinois; 

 and. for redrawings of the others from camera lucida tracings, to 

 Mr. William D. Matthews, formerly of this oflice. 



