INTRODUCTION. 3 



Gardner, from California; Dr. F. N. Duncan, from Illinois; Dr. C. W. 

 Metz, from Cuba, Isle of Pines, Jamaica, Louisiana, Florida, Cali- 

 fornia, and Long Island. 



Dr. C. W. Metz has not only furnished many specimens from inter- 

 esting localities, but he has furnished a large amount of very valuable 

 data concerning the habits of many rare species. He and the writer 

 collected together in Cuba, and the material recorded here from 

 Havana, Santiago de las Vegas, Guareiras, and Aguada Pasajeros, 

 unless credited to some other collector, is the result of our joint efforts. 

 Dr. Metz and I have worked together for several years in attempts to 

 breed various species in the laboratory, and a very large part of the 

 success that we have had is due to his interest, energy, and ingenuity. 

 From no one else have I received so much help in the collection of the 

 material for this paper, either in the matter of actual data or in that 

 of interest in and encouragement of the work. 



During the early part of 1915 I collected in the American tropics, 

 and the success of that trip was in large part due to the facilities given 

 me by Professor Carlos de la Torre at Havana, by Dr. S. T. Darling 

 at Ancon, Canal Zone, and by Dr. A. Alfaro and Professor J. F. Tristan 

 at San Jose, Costa Rica. This trip was made possible by an appoint- 

 ment to a Cutting Fellowship by Columbia University. 



