TRANSACTIONS 



OF THE 



AMERICAN ENTOMOLOGICAL SOCIETY 



VOLUME XL 



COSTA RICAN DIPTERA 



COLLECTED BY PHILIP P CALVERT, PH.D., 1909-1910 



INTRODUCTORY REMARKS 



BY E. T. CRESSON, JR. 



Under this general title it is intended, primarily, to publish the 

 results of studies of the species of this order in the material col- 

 lected by Dr. and Mrs. Philip P. Calvert in Costa Rica during 

 1909 and 1910. The papers will be prepared and published as 

 each family or group is worked up. As the Diptera of Costa Rica 

 have been but little studied, and in some families not at all, this 

 work will prove to be a fairly good preliminary treatise upon the 

 dipterous fauna of that region. 



The main purpose of Dr. Calvert's visit was the study of the 

 Odonata, and he has already published several interesting papers 

 upon that subject. However, he gave some attention to the col- 

 lecting of the Micro-Insecta, and it will be observed, by the number 

 of species described in this series, that even a casual collecting 

 along such lines will prove exceedingly interesting. All the types, 

 unless otherwise mentioned, are in the collection at the Academy 

 of Natural Sciences of Philadelphia. 



Dr. Calvert has kindly prepared the following list of the locali- 

 ties where this material was collected, with brief descriptions of 

 their topography and general surrounding conditions, which forms 

 a valuable adjunct for the purpose of this work. 



Localities where Diptera were collected 



Alajuela. — Town on the Costa Rica Railroad on the Pacific 

 slope west of San Jose. Our collecting was mostly done near the 



TRANS. AM. ENT. SOC, XL. (1) 



•^^^26 1914 



