102 FAMILY EVANIID.E. 



they will be of some real service to students desirous of identifying 

 exotic species, and who at present must perforce wade through a 

 great mass of more or less unsatisfactory descriptions, in several 

 languages and innumerable publications. In preparing them I 

 have used my best judgment in selecting characters that would be 

 reliable and easy to use, but have of course been greatly hampered 

 in this respect by the limitations of the descriptions. In such cases 

 as I have been able to examine the species in question, matters have 

 of course been much expedited. 



I shall begin the paper with a short consideration of the family 

 as a whole ; then of the Aulacinse, tabulating the genera of the 

 world and in part supplementing, in part revising, ray former paper 

 on the North American species. Then I shall take up the Fo^ninse, 

 treating it bi-iefly. I regret tliat at present I see no prospect of 

 being able to prepare a more complete monogra})h of our North 

 American species of this subfamily. In perhaps no group that I 

 have studied have the characters been so variable and difficult of 

 tabulation, so that it would require a very considerable amount of 

 time and study. Then will follow the parts on the Evaniinse as 

 above described, and I shall conclude with a catalogue of the species 

 of Evaniinse of the entire world, distributed according to their 

 proper genera. 



I wish to express my obligations to Professor Comstock of Cornell 

 University, who has placed at my disposal in the entomological 

 laboratory of that institution, where most of this work has been 

 carried on, every facility for study that could be desired, and has 

 kindly read the manuscript : to Dr. A. D. MacGillivray, also of 

 Cornell University, for constant assistance, suggestions and courte- 

 sies of many kinds, and also for reading the n)anuscript: to the 

 authorities of the United States National Museum for the loan of 

 the very valuable collection of Evauiidte belonging to that Museum: 

 to the American Entomological Society for the loan of many speci- 

 mens; to Mr. C. T. Brues and Dr. P. P. Calvert for the presenta- 

 tion of several specimens: to Mr. Henry L. Viereck for the pres- 

 entation of numerous valuable specimens, particulai'ly of North 

 American Hyptia, and some undescribed species from British 

 Guiana: to Mr. G. V. Hudson of Wellington, New Zealand for 

 the presentation of two species of Fo^ninaj including the type of tlie 

 genus Pseudofcenus : to Professor Herbert Osborn, Professor E. D. 



