OF WASHINGTON. 389 



correspond to a structural variation, however difficult this might 

 be to detect. 



MAY 16, 1899. 



The i44th regular meeting was held at the residence of Mr. J. 

 D. Patten, 3033 P street N.W. Vice-President Gill in the chair, 

 and Messrs. Pollard, Schwarz, Currie, Patten, Caudell, Morris, 

 Heidemann, Chapin, Ashmead, Vaughan, Dyar, and Howard 

 also present. The Secretary called attention to the fact that the 

 vacancy in the office of President of the Society, caused by the 

 lamentable death of Mr. Hubbard, had not been filled, and on his 

 nomination Dr. Gill was elected President. 



Under the head of Short Notes and Exhibition of Specimens, Mr. 

 Schwarz stated that he has had great difficulty in ascertaining any 

 facts concerning the distribution of Lepidoptera in Arizona from 

 published accounts, and asked whether exact localities were 

 known for this State. Dr. Dyar replied that most if not all 

 forms were labeled simply "Arizona," and that there was practi 

 cally no knowledge of exact localities in this order for the State 

 of Arizona. 



Mr. Chapin stated that last year he collected Anthocarisgenutia 

 in some number, and that there were 16 males to i female. He 

 wished to know whether this difference in proportion of the sexes 

 is constant. Dr. Dyar stated that it is not constant, and that the 

 instance mentioned was probably due to the fact that the speci 

 mens were collected at a time when the males had issued and the 

 females had not yet issued in number. Dr. Gill jocularly re 

 marked that probably the males were not eventually transformed 

 into females, and went on to mention Myxine and its protandrous 

 qualities as first appreciated by Dr. Nansen. 



Mr. Heidemann exhibited a series of Aradus niger Stal., and 

 submitted the following note on the habits of this species : 



NOTE ON ARADUS (QUILNUS) NIGER STAL. 

 By OTTO HEIDEMANN. 



Stal in his " Enumeratio Hemipterorum " III, p. 137, in which 

 he arranges the family of Aradidse, gives also a description of 

 two species, one European, from the Island of Cyprus, and the 

 other from N. America {Carolina meridlonalis}. These two 

 differ from the other species of the genus Aradus in the shortness 



