CONTENTS. 



Cockerell, T. D. A. New and Little-Known North American Bees (Con- 

 tinuation) ............ , v . . 341 



Pilsbry, Henry A. New Achatinidre and Helicida; from Somaliland . . 357 

 Pilsbry, Henry A. New Australian Mollusks. (Plate IX) . . . 364 



Pilsbry, Henry A. and E- G. Vanatta. Descriptions of two new species 



of Ceridn 3(55 



Stone, Witmer. On the Annual Molt of the Sanderling . . . .368 

 Fox, William J. Contributions to a Knowledge of the Hymenoptera of 



Brazil, No. 3— Sphegidte (sens. lat. ) 373 



Benedict, James E. A Revision of the Genus Synidotea . . . .389 

 Frazer, Dr. Persifor. Geological Section from Moscow to Siberia and 



Return , . . 405 



Allen, Harrison, M. D. Commemorative Minutes .... 458, 481 



Horn, George H., M. D. Commemorative Minute 459 



Van Denburgh, John. Reptiles from Sonora, Sinaloa and Jalisco, Mexico, 



with a Description of a new species of Sceloporus .... 4G0 



Pilsbry, Henry A. and Benj. Sharp, M. D. Scaphopoda of the San 



Domingo Tertiary. ( Plates X, XI ) 4ii5 



Pilsbry, Henry A. New Brazilian Streptaxidse 477 



Pilsbry, Henry A. Additional Note on the Gastropod Genus Tatea, Teni- 



son-Woods ............ 480 



ALLEN, Harrison, M. D. Comparative Measurements of Skulls . . . 482 

 Rhoads, Samuel N. Notes on Living and Extinct Species of North Ameri- 

 can Bovidce. (Plate XII) . . 483 



Pilsbry, Henry A. Descriptions of two new forms of Perideris . . . 503 

 Proceedings of a Meeting held in Commemoration of Harrison 



Allen, M. D. and George Henry Horn, M. D. . . . . 505 

 Edward J. Nolan. Biographical Notices of Harrison Allen and 



George Henry Horn 505 



Samuel N. Rhoads. Dr. Allen's Zoological Work . . . 518 

 Daniel G. BrinTon, M. D. Dr. Allen's Contributions to Anthro- 

 pology 522 



John B. Smith. Dr. Horn's Contributions to Coleopterology . 529 



Report of the Recording Secretary 536 



Report of the Corresponding Secretary 538 



Report of the Librarian 539 



Report of the Curators 542 



Report of the Biological and Microscopical Section .... 546 



Report of the Conchological Section 546 



Report of the Entomological Section , 547 



Report of the Botanical Section 548 



Report of the Mineralogical and Geological Section . . . 549 



Report of the Ornithological Section 550 



Report of the Anthropological Section 552 



Reports of the Professors 552 



Additions to the Museum . . . . 557 



Index to Genera 565 



General Index 574 



