Sept., 1887.] ELLIOTT SOCIETY. 177 



American Philosophical Society, Philadelphia : Proceedings, Vol. 

 XXIV, No. 125. 



Academy of Sciences, St. Louis : Transactions, Vol. IV, No. 4. 



California Academy of Sciences : Bulletin, Vol. II, No. 7. 



Dr. J. F. Churchill's Free Stsechiological Dispensary : Eeports 

 1 and 2. 



Mr. E. A. Smyth, Jr., exhibited specimens of Geothlypis tri- 

 chasy 



Dr. Manigault exhibited a fossil upper jaw of a Dugong, from 

 Cainhoy, S. C.,* and several beautiful glass models of lower forms 

 of Marine Invertebrates. 



The Chairman exhibited a model showing the principle of Mil- 

 ler's form of Heliotrope, mentioned by him at the meeting of Aug- 

 ust 25 th. 



Me. Smyth, referring to tlae specimens exhibited by him, stated that it is a 

 recognized fact among many of our migratory birds, and especially among the 

 Warblers, that the males and females migrate separately. 



On the night of Sept. 23d, immediately following a cold wave, our City was 

 invaded by a large number of Warblers, described by the newspaper as ' ' about 

 the size of Canaries, * * * having brown backs and yellow breasts. " 

 many were killed by striking against the electric lights. 



Mr. Smythe was fortunate enough to see several examples, both dead and 

 alive, all of which were Maryland Yellow-throats, ( Geothlypis triclms,) and 

 all females. Those who had seen the birds and whom he was able to question 

 wore positive in their description, which agreed with the vague description 

 given by the paper, and no one was able to recollect having seen any black 

 about the heads of the birds. As the black on the head of the male Yellow- 

 throat is a most noticeable feature, and as all of the examples that came under 

 his own observation were females, he felt justified in concluding that the flight 

 was composed wholly, or nearly so, of females. The birds seemed very much 

 exhausted or frightened, and some were caught by hand. 



The following paper was read : 



* See page 91. 



VOL. n. 23 Published MCh., 1888. 



