BIOLOGICAL PAPERS. 



"Formaldehyde Gas Not Effective upon Flies." 



By E. S. Tucker, Baton Rouge, La. 



"Further Records of Insects Personally Collected in Kansas' 

 AND Colorado." 



By E. S. Tucker, Baton Rouge, La. 



"Provisional Catalogue of the Flora of Kansas. Part II.— 

 Gymnosperms and Monocotyls. " 



By Bernard B. Smyth, and L. C. R. Smyth. 



"A Partial Key to the Genera of North American Jassoidea," 



By S. E. Crumb. 



"Insecticides." 



By L. E. Sayre. 



"A System of Notations Applied to Entomological Access fons."' 



By E. S. Tucker. 



"Bitropism." 



By Lyman C. Wooster. 



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