622 proceedings of the academy of [dec, 



Insects. 



Thirty metal cases and 420 boxes were secured with the State 

 appropriation for the accommodation of the collection of insects,, 

 and Dr. Henry Skinner, head of this department, and Mr. E. T. 

 Cresson, Jr., have spent the greater part of the year rearranging the 

 collections and mounting recent accessions. 



In the Diptera the families Stratiomyiidse, Tabanidae (in part), and 

 Leptidse have been rearranged. Studies have been made of the 

 Ephydridae by Mr. Cresson. Thirty-two new species were described. 



In the order Coleoptera the Horn types have been numbered and 

 the families Dytiscidse, Hydrophilidse and part of the Silphidse re- 

 arranged, while many specimens have been identified and added to 

 the collection. 



The local collection has also been rearranged. 



In the Lepidoptera the American moths have been arranged in 

 the new cases as well as all of the exotic moths, except the Noctuidse 

 and Geometridse. 



In Orthoptera Mr. J. A. G. Rehn has arranged the exotic Tetti- 

 goniidse and portions of the Blattidae, Mantidse, and Acrididse in the 

 new cases. 



He has also continued his studies of the Brazilian Orthoptera in 

 the Academy's collection and material loaned by the U. S. National 

 Museum and Stanford University, while some time has been devoted 

 to the determining of South African collections submitted by the 

 Transvaal Museum, for which work the Academy receives a duplicate 

 series. 



Mr. Rehn spent the months of July and August in the field on 

 an entomological expedition to southern Arizona, undertaken jointly 

 with the American Museum of Natural History. Valuable collec- 

 tions were obtained, in which the Academy will share when they are 

 worked up. 



Mr. Morgan Hebard has, as in the past, given generously of his 

 time and material toward the development of the Orthoptera collec- 

 tions. He also generously provided a preparator during part of 

 the year, who completed the mounting and labelling of the material 

 obtained in 1915 on the Hebard-Acaclemy expedition in the West. 



Many specialists have made use of the collections during the year 

 and a loan was made to E. B. Williamson. 



Other Invertebrates. 

 Mr. Henry W. Fowler has labelled and arranged about 200 small 



