5 2 Report of the President 



For these larger purposes our expeditions have been planned 

 and carried out. During the spring Mr. Grossbeck spent 

 several weeks in Jamaica securing a collection that is naturally 

 small on account of the early period of the year, but which is 

 exceedingly interesting as it gives an indication of the character 

 of the invertebrate fauna at a time during which collections 

 are rarely made. Dr. Lutz, with the cooperation of many 

 members of the New York Entomological Society, continued 

 his studies of the insect fauna in the neighborhood of New York. 

 Late in May Dr. Crampton, Mr. Miner and Dr. Lutz undertook 

 an extended expedition to the West Indies and South America, 

 for which funds were generously provided by the late Mr. 

 Charles H. Senff. Three weeks were devoted to relatively 

 intensive work in the Island of Dominica, while small collec- 

 tions were obtained in numerous other islands of the Lesser 

 Antilles. Mr. Miner returned to New York in July and later 

 proceeded to Nahant, where, with the aid of several members 

 of the preparation room staff, further studies were made with 

 a view to the construction of the Tide Pool Group. Meanwhile 

 Dr. Crampton and Dr. Lutz continued to British Guiana 

 where extensive collections were obtained from the lower 

 levels near the coast and from the forest and plateau in the 

 neighborhood of Kaieteur Falls. Here Dr. Lutz remained 

 until the middle of August to make more thorough studies of 

 the invertebrate fauna, while Dr. Crampton continued 

 through the forests of British Guiana and across the savan- 

 nas of northern Brazil to Mount Roraima. This expedition 

 secured many thousands of specimens from various ecological 

 regions and from different barometric levels, from regions 

 which are of particular importance for the study of the larger 

 problems under consideration. 



During the summer Mr. Beutenmiiller devoted more than 

 three months to field work in the Black Mountain region of 

 North Carolina, utilizing funds provided by Mr. Samuel V. 

 Hoffman. Professor Treadwell carried on field work in Con- 

 necticut during the same period. Finally, in November, Dr. 

 Lutz and Mr. Leng, accompanied by Mr. W. T. Davis, prose- 

 cuted field studies in northern and southern Florida with 

 extremely gratifying results. 



