NATURALISTS' DIRECTORY. 13 



and shall have been at the time of said award made known and pu Wished at least 

 one year. If in consequence of the extraordinary merit of any such investigation 

 or discovery, the Council of the Society should see fit, they may award therefor the 

 the sum of one thousand dollars. 



Subject of the Annual Prize for 1866-7. " The fertilization of plants by the agen 

 cy of insects, in reference both to cases where this agency is absolutely necessary, 

 and where it is only accessory;" the investigations to be in preference directed to 

 indigenous plants. 



Subject for 1867-8. "Adduce and discuss the evidences of the coexistence of man 

 and extinct animals, with the view of determining the limits of his antiquity." 



Memoirs offered in competition for the above prizes must be forwarded on or be- 

 fore April first, prepaid and addressed 



"Boston Society of Natural History, 



for t/te Committee on the Walker Prizes, 



Boston, Mass.'" 



Each memoir must be accompanied by a sealed envelope enclosing the author's 

 name, and superscribed by a motto corresponding to one borne by the manuscript." 



BOSTON, June, 1866. 



THE ENTOMOLOGICAL SOCIETY OP 

 PHILADELPHIA. 



This Society, organized in the Spring of 1869, has earned for itself in the short 

 period that has since elapsed, a name and reputation which might be envied by many 

 of the oldest scientific associations in this country or in Europe. Devoted sojely to the 

 study of that branch of Zodlogy which its name indicates, its members have infused 

 a spirit of energy and progress into its proceedings, which has accomplished in a few 

 months more than the same number of years have effected in larger bodies endowed 

 with more extensive means. In fact the unavoidable expenses of accumulating and 

 maintaining a collection, cf publishing its quarterly journal, &c., have been borne 

 almost entirely by the late Dr. Thomas B. Wilson, of Philadelphia. The generous 

 liberality of this keen student of Nature was checked by his sudden death, after an 

 illness of less than a week, on Wednesday, the 15th of March, 1865. The Society 

 which had been the object of his benevolence had every reason to expect a continue 

 ation of his bounty in the form of a bequest, from frequent expressions of his inten- 

 tions, but his untimely death has placed them in such a position that they cannot 

 continue their former useful career without the aid of all well disposed patrons of 

 science. They are anxious to keep up the prestige of their publications, and for this 

 purpose they ask subscriptions to a Fund of $50 000, of which amount $10 000 has 

 already been realized and funded. To all subscribers of $100 and upwards, an Hon- 

 orary Membership is tendered, and the publications of the Society will be furnished 

 free of charge during the life-time of the subscriber. 



The importance of the work in which this association is engaged, cannot fail to 

 be universally recognized at this time when our crops are yearly destroyed by new 

 and strange insect enemies, whose diminutive size, mysterious transformations, and 

 immense multitude , make us, in our ignorance of their habits, utterly powerless 

 before them. On this subject a monthly bulletin, called the Practical Entomologist, 

 is issued by the Society for distribution to any one forwarding their address and 

 fifty cents per year to the Secretary of the ENTOMOLOGICAL SOCIETY OF PHILADEL- 

 PHIA, No. 518 So. 13th street, Philadelphia, Pa. Any one remitting annually a sum 

 of not less than One dollar, to the Secretary, E. T. Cresson, will be elected a Contrib- 

 uting Member of the Society, and will receive a Diploma to that effect 



