BULLETIN OF THE 



The BULLETIN will be published at irregular intervals, and the time of its ap- 

 pearance will be governed by the amount and character of the material at hand. 

 The greatest care will be exercised in determining what contributions are to be 

 admitted to its pages, inasmuch as the information it may convey should be ac- 

 curate and permanent in value 



The Academy of Science is desirous of placing within the reach of its mem- 

 bers, through its library, the results of investigations conducted by sister socie- 

 ties and published in their journals, and hence presents itself to their attention in 

 the hope that an exchange of publications, subject to the usual conditions, may 

 be made. There are now in preparation, papers upon the Musci and Lichens, 

 and upon the Ornithology of the region about Des Moines. An extended paper 

 upon the Mites will probably be the first contribution in the science of entomol- 

 ogy, and others may be expected to follow as rapidly as the exigencies of publi- 

 cation will allow. 



