viii The Biological Society of Washington. 



L. 0. Howard: The European Hornet in America. 



The remainder of the evening was occupied with an informal 

 discussion on the classification of birds, F. A. Lucas, Theodore 

 Gill, W. H. Ashmead, and William Palmer participating. 



February 12, 1898— 287th Meeting. 



The President in the chair and 27 persons present. 



L. 0. Howard exhibited specimens of Mantidse and Locus- 

 tidse collected by Dr. W. L. Abbott at Trong, Lower Siam, com- 

 menting particularly on the prevalence of aggressive resem- 

 blances among tropical Mantids. 



The following communications were presented : 



E. A. De Schweinitz : The Treatment of Animal Diseases with 

 Antitoxic Serums.* 



0. P. Hay: The Protospondyli and Aethiospondyli of A. S. 

 Woodward.f 



Theodore Gill : Classification of the Astacoidean Crustaceans. 



February 26, 1898 — 288th Meeting. 



The President in the chair and 57 persons present. 



The evening was devoted to a symposium upon the topic, 

 ' The Teaching of Biology,' with the following speakers : E. L. 

 Morris, W. H. Dall, Erwin F. Smith, Theodore Gill, H. J. Web- 

 ber, B. W. Evermann, Ch. Warded Stiles, and Edward L. Greene. 



March 12, 1898— 289th Meeting. 



The President in the chair and 26 persons present. 



Theodore Gill exhibited and discussed a new text-book on 

 zoology by Parker and Haswell. 



M. B. Waite gave an illustration of fasciation in the black 

 locust. 



The following communications were presented : 



Ch. Warded Stiles : Practical Suggestions in Regard to Trichi- 

 nosis. 



Erwin F. Smith : Migula's ' System der Bakterien.' 



F. C. Ken} 7 on : Some Recent Advances in our Knowledge of 

 the Nervous System. 



* To be published as a Report of the Bureau of Animal Industry, 

 t Am. Nat,, XXXII, No. 377, pp. 341-1:54!), May, 1898, under the title, 

 ' Classification of the Amioid ami Lepisosteoid Fishes. 



