368 



the meeting at London of the Second International Entomological 

 Congress, Dr. Forbes visited the museums at London, Paris, and 

 Berlin, where he personally made arrangements to have all of the 

 types of North American Phyllophaga at these institutions dissected, 

 and drawings of the genital structures prepared for these studies — 

 an arrangement that was later extended by correspondence to include 

 ali of these types known to be in foreign museums. Indeed, the re- 

 sults accomplished thus far have been possible only through the con- 

 tinued interest and encouragement and material assistance with which 

 Dr. Forbes has followed each step of the work; and any credit that 

 may be due for these results belongs to Dr. Forbes quite as much as to 

 the writer. 



Special acknowledgments are due to Dr. Otto Taschenberg, of the 

 University at Halle, who, as stated before, generously sent the Bur- 

 meister types all the way to America, in order that they might be 

 examined directly for these studies. 



For directing the dissection of type specimens under their charge 

 and for the preparation of drawings of the genital structures for these 

 studies, the writer is deeply indebted to Mr. Charles J. Gahan, of the 

 British Museum of Natural History, to M. Pierre Lesne, of the 

 Museum d'Histoire Naturelle de Paris, to Dr. Richard Heymons, of 

 Berlin University, to Dr. Karl Brandt, of the University at Kiel, and 

 to Dr. B. Y. Sjoestedt, of the Naturhistoriska Riksmuseum at Stock- 

 holm. 



The Graduate School of the Ll^niversity of Illinois has made liberal 

 grants of money for the purchase of collections and to defray the 

 cost of the drawings made from the types in foreign museums. 



The late Dr. John B. Smith generously placed his private collection 

 of "May beetles" unreservedly at the writer's disposal, with instruc- 

 tions to use the material it contained in any way that might advance 

 the work. 



For the privilege of dissecting type specimens, for the loan of 

 valuable material, and for innumerable courtesies, the writer is deeply 

 indebted also, to Dr. L. O. Howard ; to Mr. J. C. Crawford, Mr. E. A 

 Schwarz, and Mr. H. S. Barber, of the L^^nited States National Mu- 

 seum ; to Dr. Henry Skinner and Mr. E. T. Cresson, Jr., of the Mu- 

 seum of the Academy of Natural Sciences of Philadelphia; to Mr. 

 Charles Schaeffer, of the Museum of the Brookl}'n Institute of Arts 

 and Sciences ; and to Mr. Samuel Henshaw, of the Museum of Com- 

 parative Zoology at Harvard University. 



Special acknowledgments are due to Mr. E. A. Schwarz, Mr. 



