Dr. Engelmann presented for the museum a collection of spe- 

 cimens in natural history received from the Agassiz Scientific 

 Institute of Sacramento, Cal., through Dr. I. Logan, president 

 of that society ; for which it was voted that the thanks of the 

 Academy be communicated to the society. 



Messrs. N. H. Clark, Charles F. Bendire, E. C. Cushman» 

 Samuel Knight, and Dr. R. Roemer, and Col. C. Shaler Smithy 

 were elected associate members. 



June 2, 1873. 



President Eads in the chair. 



Nine members present. 



A letter was read from the Secretary of the Smithsonian Insti- 

 tution, dated May 31, 1873, informing the Academy that the 

 Smithsonian Institution would take charge of the transmission 

 of the Transactions of the Academy to foreign countries in the 

 same manner as it had heretofore been done. 



Mr. E. H. Singleton communicated his meteorological obser- 

 vations and weather-charts for the month of May, as made at the 

 office of the U. S. Signal Sei'vice at St. Louis. 



Mr. C. V. Riley read a supplementary paper on the Yucca 

 moth {Fro?iuba yuccasella)^ the fertilizer of that plant, describing 

 the chrysalis, and showing by illustration and description how 

 admirably it was adapted to its wants and conditions, and how 

 by a series of levers it was able to pry its way through the soil 

 and issue as a moth just about the time the Yuccas bloom. Re- 

 ferred to Committee on Publication. 



Dr. Engelmann remarked that the opinion had been every- 

 where expressed that the month of May past had been a very wet 

 and unusually cool month, which only showed an aptitude to 

 forget the past in our realization of the present ; for the mean 

 temperature of May was 65°, only one degree less than the aver- 

 age for May in this city. Only once (on May 4) the thermome- 

 ter indicated less than 47° ; on the morning of that day it fell to 

 40° ; frost, we had none, nor did the temperatiue on any one day 

 rise higher than 88°. 



