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- 
ambycidae has been rearranged in its entirety. The Silphidae, 
Scydmaenidae and Pselaphidae have also been rearranged. 
In the Lepidoptera the genus Argynnis has been rearranged, and 
many additional specimens added. Some work has also been done 
on the exotic species. Mr. R. C. Williams, Jr., arranged the Lycaeni- 
dae 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 Ephydridae, and has also determined and 
rearranged the Sciomyzidae and Sarcophagidae. 
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 
