LIST OF CONTRIBUTORS. 



With reference to the several articles contributed by each. 



For Verbal Communications see General Index. 



Baldwin, D. D. Descriptions of new Species of Achatinellidse 



from the Hawaiian Islands (Plates X and XI) 214 



Cockerell, T. D. A. Some new Bees of the Genus Perdita ... 11 

 Ellis, J. B. Notes on some specimens of Pyrenomycetes in the 



Schweinitz Herbarium of the Academy 20 



Ellis, J. B., and B. M. Everhart. New Species of Fungi from 



various localities 413 



Foote, Warren M. Preliminary Note on a new Alkali Mineral . 408 



Fowke, Gerard. Archaeological Work in Ohio 506 



Fox, William J. Synopsis of the Stizini of Boreal America . . 264 

 Synopsis of the Bembicini of Boreal America (Plate XIV) . 351 

 Synopsis of the North American Species of Gorytes Latr. . . 517 

 Greene, Edward L. Eclogse Botanicaj, No. 2. I. Some new 



Western Plants ; II. Revision of Tropidocarpum 546 



Gwatkin, H. M., and Henry Sutor. Observations on the Den- 

 tition of Achatinellidffi 237 



Harris, Gilbert D. New and otherwise interesting Tertiary 



Mollusca from Texas (Plates I-IX) 45 



Holm, Theo. Contributions to the Flora of Greenland 543 



Johnson, C. W., and D. W. Coquillet. Diptera of Florida, with 



additional descriptions of new Genera and Species .... 303 

 Keller, Ida A. The Jelly-like secretion of the fruit of Peltandra 



undulata (Plate XII) 287 



Notes on the Study of the Cross-fertilization of Flowers by 



Insects 555 



Kennedy, William. The Eocene Tertiary of Texas east of the 



Brazos River 89 



Meehan, Thomas. Memoir of John Howard Redfield 292 



Moore, J. Percy. Notes on American Enchytraeidre. I. New 



Species of Fridericia from the vicinity of Philadelphia 



(Plate XIII) 341 



Morris, Charles. The Extinction of Species 253 



Nolan, Edw. J., M.D. A. biographical notice of W. S. W. 



Ruschenberger, M. D 452 



/ ^ 337 



