June, '07] ENTOMOLOGICAL NEWS. 257 



One of the most important entomological papers of many years past, 

 from the standpoint of the student of variation, of heredity, or of 

 evolution, has recently been issued by the Carnegie Institution of 

 Washington, as Publication No. 48. It is entitled "An Investigation 

 of Evolution in Chrysomelid beetles of the genus Leptinotarsa," by 

 William Lawrence Tower, Instructor in Embryology, University of 

 Chicago, and Associate, Station for Experimental Evolution at Cold 

 Spring Harbor, New York. Pp. X, 320. Thirty plates, some in colors, 

 31 text figures, 107 variation tables in the text. 



A SPECIAL MEETING of the Entomological Society of America will be 

 held in Boston about the igth of August next, in connection with the 

 Seventh International Congress of Zoology. Members are urged to be 

 present and to contribute to the program of the meeting. 



In order to facilitate the work of the Executive Committee in ar- 

 ranging a program, abstracts of proposed communications should be 

 mailed to the Secretary, J. CHESTER BRADLEY, Secretary-Treasurer, 

 Berkeley, Calif. 



Note that after July rsth the address of the Secretary-Treasurer 

 will be Cornell University, Ithaca, N. Y. 



Doings of Societies. 



Minutes of meetings of the Brooklyn Entomological Society, 

 55 Stuyvesant Avenue, Brooklyn, N. Y., December /th, 1906. 

 President Dr. Zabriskie in the chair and fifteen members pres- 

 ent. Messrs. Robert P. Dow, of Brooklyn, and H. H. Brehme, 

 of Newark, N. J., were elected members. 



Mr. Dickerson spoke on "Causes of Periodical Increase and 

 Decrease of Insects." Mentioning the enormous increase, pos- 

 sible under favorable conditions in some species, such as 

 the San Jose scale and housefly, his remarks related chiefly to 

 the occurrence and condition during a number of years of the 

 following insects: rose-chafer, chinch-bug, cottony maple 

 and cushion scales, army and canker worms and brown-tail and 

 gipsy moths. As factors causing a decrease he quoted : clim- 

 atic conditions, insect epidemics, the interference by man, 

 predacious insects and animals, fungus growths and parasites. 



Mr. Doll stated that from a lot of cocoons of Agapenia <il- 

 bina, collected at Brownsville, Texas, in the summer of 1903, 

 moths had emerged during that year and during every suc- 

 ceeding year until the present time, when several pupa- still 



