350 PROCEEDINGS OF THE ACADEMY OF [DeC, 



The usual care has been devoted to the preservation of the col- 

 lections and a considerable amount of rearrangement in the new 

 metal cases carried into effect. In the Coleoptera the family Cer- 

 ambycidffi has been rearranged in its entirety. The Silphidae, 

 Scydmsenidse and Pselaphidse have also been rearranged. 



In the Lepidoptera the genus Argynnis has been rearranged, and 

 many adcUtional specimens added. Some work has also been done 

 on the exotic species. Mr. R. C. Williams, Jr., arranged the Lycseni- 

 dse according to his studies of the genitalia of the family. 



In the Diptera, Mr. E. T. Cresson, Jr., has continued his system- 

 atic studies of the family Ephj^dridse, and has also determined and 

 rearranged the Sciomyzidse and Sarcophagidis. 



In the Orthoptera, Mr, J. A. G. Rehn has continued the rearrange- 

 ment of the specimens in the new type of large glass-covered boxes, 

 and the work has been nearly completed. Numerous small collections 

 have been mounted, labeled, and stored. A report on extensive 

 Brazilian collections has been completed, as well as a study of the 

 genus Mermiria both of which will be published as soon as the 

 illustrations are completed. Numerous specimens have been de- 

 termined for correspondents. 



Mr. Morgan Hebard has spent most of his time at the Museum 

 during the year and in the course of his studies on his various col- 

 lections, has presented much valuable material to the Academy. 

 His expedition to Florida and Georgia, already referred to, was 

 productive of collections of much importance. Many visiting 

 entomologists have studied the collections of insects during the 

 year and specimens have been loaned to Jas. S. Hine, G. C. Crampton 

 and W. T. Davis. 



Vertebrate Fossils. 



The collections of vertebrate fossils have been removed to the new 

 series of cases provided for them last year. The main collections 

 are arranged in trays in the storage closets under the cases, while a 

 representative series has been selected from them for exhibition. 

 The mammals and birds have been arranged by Mr. Rehn, the 

 reptiles and fishes by Mr. Fowler, Mr. Rehn has also compiled 

 extensive data from which comprehensive labels will be prepared, 

 describing the exhibition for the benefit of the public. 



Invertebrate Fossils. 



Accessions to this department have not been large during the past 

 year, Dr, Pilsbry and the late Prof, Amos P, Brown have published 



