f 



OF WASHINGTON. 493 



Dr. Dyar showed a method of mounting Lepidoptera separately 

 in small glass boxes (glass above and below) , of which i ,600 speci 

 mens were found in the Hoffman collection recently purchased 

 by the U. S. National Museum. 



Mr. Heidemann exhibited specimens of Gargaphiaundulata 

 which he had found in the District of Columbia and at Bedford 

 Springs, Pa., upon Ceanothus americanus, which he takes to be 

 its native food plant. He also exhibited a specimen of Aradus 

 falleni\.d\., a species new to the District of Columbia, which had 

 been taken by Mr. Jacob Kotinsky on the shirt sleeve of a friend 

 whom he met in the streets of Washington. This species, origi 

 nally described from Rio Janeiro, occurs in other South Ameri 

 can localities, in Mexico, Key West, and <Biscayne Bay, Fla., 

 Virginia Beach, Va., and also in Arizona and New Mexico. It 

 is the only species of Aradus found in Mexico. 



Mr. Johnson showed some tobacco which had been injured 

 by Lasioderma serricorne, and described experiments in the ex 

 termination of this species in a large tobacco factory in Baltimore, 

 where 160 boxes each containing 500 pounds of closely-packed 

 tobacco received from Pennsylvania and Ohio were badly infested 

 by this insect. The difficulty of reaching the insects in the in 

 terior of these 5oo-pound boxes either by steam, bisulphide of car 

 bon, or hydrocyanic acid gas, was mentioned, and the fumigation 

 of the entire factory with hydrocyanic acid gas with the consent 

 and cooperation of the Baltimore police was described. This 

 fumigation was eminently successful except for these tightly- 

 packed boxes. The rats in the building were killed, as well as 

 the beetles and their parasites ( Catolaccus anthonomi Ashm.). 



Some discussion ensued, participated in by Messrs. Waite, Mar- 

 latt, Chittenden, and Howard. 



Mr. Benton showed specimens of Prionidus cristatus which 

 he said had been very abundant this year, over 100 being engaged 

 in killing his bees on the grounds of the Department of Agricul 

 ture. He also showed a queen and three workers of the Cyprian 

 bee. 



Mr. Ashmead stated that his experience in regard to the abund 

 ance of Prionidus the past summer had been the same as Mr. Ben- 

 ton's. Many specimens had been brought to him at the National 

 Museum by people who said they had never seen it before. 



