BIOTIC ASSOCIATIONS OF COCKROACHES— ROTH & WILLIS 355 



Lawson, Kansas State College {Comperia merceti) ; Dr. K. D. 

 Roeder, Tufts University {Hierodula tenuidentata ( ?) ) ; Dr. E. O. 

 Wilsoni Harvard University {Ischnoptera deropeltiformis). 



We thank the following individuals for checking the taxonomy of 

 the following organisms or for reading the indicated sections of the 

 manuscript: Fungi.— Dt. R. K. Benjamin, University of California; 

 Dr. E. G. Simmons, Quartermaster Research Laboratories. Protozoa. 

 —Dr. R. R. Kudo, Professor Emeritus, University of Illinois. Hel- 

 minths.— Mrs. May Belle Chitwood and Dr. J. T. Lucker, U. S. 

 Department of Agriculture. Centipedes and whipscorpions.— Dr. R. 

 E. Crabill, Jr., U. S. National Museum. Scorpions.— Dr. J. L. 

 Cloudsley-Thompson, University of London; Dr. R. E. Crabill, Jr. 

 Spiders.— Dr. B. J. Kaston, University of Connecticut; Dr. R. E. 

 Crabill, Jr. Mites.— Dr. J. H. Camin, Chicago Academy of Sciences ; 

 Dr. E.'w. Baker, U. S. National Museum. Cockroaches.— Dr. A. B. 

 Gurney and J. A. G. Rehn. Ants.— Dr. W. L. Brown, Jr., Museum of 

 Comparative Zoology, Harvard College. Hymenopterous parasites of 

 cockroach eggs.— Dr. B. D. Burks, U. S. National Museum; Dr. 

 H. K. Townes, University of Michigan. Cockroach-hunting zvasps. 

 —Dr. K. V. Krombein, U. S. National Museum. Lepidoptera.—Dr. 

 J. F. G. Clarke, U. S. National Museum; Dr. E. L. Todd, U. S. 

 Department of Agriculture. Miscellaneous insects.— Dr. R. S. Beal, 

 Dr. A. B. Gurney, C. W. Sabrosky, Dr. R. L Sailer, and J. T. Spil- 

 man, U. S. National Museum. Fishes.— Dr. L. P. Schultz, U. S. 

 National Museum. Amphibians and reptiles.— Dr. Doris M. Cochran, 

 U. S. National Museum. Birds.— Dr. Herbert Friedmann, U. S. 

 National Museum. Mammals.— Dr. D. H. Johnson, U. S. National 



Museum. 



We thank the following individuals for reading the entire manu- 

 script : J. A. G. Rehn; Dr. A. B. Gurney; Maj. Gordon Field, U. S. 

 Army ; and Dr. H. L. Sweetman, University of Massachusetts. The 

 monograph has profited by the friendly criticism of these entomol- 

 ogists. 



We thank Dr. R. A. Howard, Harvard University, for checking 

 lists of plant names; Mrs. Maria E. W. Torok, formerly of the 

 Quartermaster Technical Library, for assistance in obtaining obscure 

 literature; Miss Louise Bercaw, U. S. Department of Agriculture 

 Library, for identifying the journal containing the paper by Vlasov 

 and Miram ; the individuals who translated foreign language articles, 

 for which they are credited in the bibliography ; and Miss G. Lillian 

 Fede, Quartermaster Research Laboratories, for typing the manu- 

 script. 



