VI PREFACE 



times throughout the year, and our movements within the 

 country were mainly for the purpose of carrying out that 

 plan. Our investigations have not yet been completed and 

 we have little to say in these pages on that technical subject. 

 What we here set forth are chiefly our more incidental ob- 

 servations recorded in our diary. 



To make this record of the greatest possible value we 

 have sought the aid of specialists for the identification of 

 our specimens and are indebted to Senor Adolfo Tonduz, 

 botanist of the Museo Nacional, San Jose, Costa Rica 

 (while we were still in that country), and Prof. Henry Pit- 

 tier (after leaving it) for the names of our plants. M. P. de 

 Beauchamp has identified our planarians. Dr. H. A. Pilsbry 

 the molluscs, Prof. J. P. Moore the annelids. Dr. R. V. 

 Chamberlin the myriopods, Mr. H. W. Fowler the Crustacea 

 and lower vertebrates, Mr. N. Banks the arachnids and 

 neuropteroids (exclusive of odonata), Mr. J. A. G. Rehn the 

 orthoptera, Mr. G. C. Champion many of the coleoptera 

 and heteroptera, Prof. W. M. Wheeler the ants. Prof. T. D. 

 A. Cockerell the bees, Mr. W. J. Fox the fossorial hymenop- 

 tera. Dr. Henry Skinner the lepidoptera, Dr. W. T. M. 

 Forbes the caterpillars, Messrs. E. T. Cresson, Jr., J. R. 

 Malloch and C. P. Alexander the diptera, Messrs. F. Knab, 

 E. A. Schwarz, O. Heidemann and Dr. H. G. Dyar certain 

 insects from bromeliads, and Prof. A. P. Brown the rock 

 specimens. Profs. J. F. Tristan and A. Alfaro and Mr. C. 

 H. Lankester, with whom we made various excursions in 

 Costa Rica, aided us in identifying many animals, Mr. 

 Lankester especially the birds. We ourselves are responsi- 

 ble for the determination of the odonata and some of the 

 larger coleoptera and hemiptera. 



Such success as may have attended our studies in Costa 

 Rica was largely due to the many kind friends resident in 

 the country: Prof. J. F. Tristan and members of his family, 



