entomological section. xv 



October 24, 1889. 

 Director Dr. Horn in the chair. 



The following additions to the Library of the American Entomo- 

 logical Societ)'^ were announced : 



Canadian Entomologist, vol. xxi. No. 10. From the Editor. 



Entomologist's Monthly Magazine, vol. xxv, No. 5. From the 

 Conductors. 



Insect Life, vol. ii. No. 3. From the U. S. Dept. of Agriculture. 



Le Naturaliste Canadien, vol. xix. No. 3, September, 1889. From 

 the Editor. 



Berliner Entomologische Zeitschrift, vol. xxxiii, No. 1. From the 

 Society. 



Compte-Rendu, ser. iii, No. 116. From the Society. 



The Executive Committee reported progress of work. 



The Publication Committee reported in favor of publishing the 

 following papers : 



The species of Heterocerus of Boreal America by Geo. H. Horn, 

 M. D. 



Notes on the species of Ochthebius of Boreal America by Geo. 

 H. Horn, M. D. 



Notes on the species of Dendroctonus of Boreal America by W. 

 G. Dietz, M. D. 



Reported accepted and publication ordered. 



Written communication 231 was read by title and referred to 

 Publication Committee. 



Mr. Calvert spoke of the migration of Dragon-flies. He recorded 

 the occurrence of forty-six species about Philadelphia, forty being 

 in his cabinet, the remainder in that of the Society. He also re- 

 corded Mesothemis corrvpta as an addition to the local fauna. 



Mr. Aaron spoke of an observation made recently which seemed 

 to indicate a migration of Anax Junius, and more recently of Danais 

 Archippus. 



Dr. Horn spoke of the species of Hydrobius and the characters 

 which must be used in the separation of species. 



Mr. Aaron, referring to his progress in a bibliographical catalogue 

 of our Lepidoptera, asked as to the desirability of including the 

 semi-tropical forms which occurred in .southern Florida. The debate 

 which followed indicated that those species should be included, which 

 had established themselves in the vicinity. 



