Vol. xxx I KNTOMOUH;IC\I. XKWS. 57 



of North America, especially in regard to the Glacial, Ozarkan and 

 Sonoran zones of dispersal. 



Mr. Rehn spoke of similar zonal dispersion in some orthopteran 

 genera. 



Dr. Calvert brought up the question as to the origin and relation- 

 ships of the Elateridae and Lampyridae, to which Dr. Van Dyke re- 

 plied that they were evidently very close; probably of the same origin 

 with more or less parallelism in their development of certain characters. 

 Both families are considered by most authors as being of the most 

 primitive of the coleoptera. 



Mr. Rehn illustrated the error in considering species as widely 

 spread over certain areas while, in fact, if more detailed collecting 

 was done and more detailed data given as to locality, altitude, and 

 environment, it would be found that such species are more or less 

 restricted, with distribution following only a well-defined, connected 

 life zone. 



Meeting of June 10, 1918, in the same hall, Dr. Henry Skinner, 

 President, in the chair. Sixteen persons present including Messrs. 

 Passell and Kline, visitors. 



The custodian announced the following donations to the collection : 

 two specimens Tabanus fusco-punctaius from Florida, from G. M. 

 Greene; twenty species Crane flies and larvae in alcohol, from C. P. 

 Alexander; 300 microscopic slides of the male genitalia of the genus 

 Lycacna (Lepidoptera) and the insects from which the segments 

 were taken, from R. C. Williams, Jr. 



Orthoptera. Mr. Rehn exhibited the series of the Acridid genus 

 sicrniiria from the Hebard collection, all the known forms being rep- 

 resented by large series. The speaker also made some comments on 

 the relationship and distribution of the species, followed by discus- 

 sion on the distribution of insects in general by Messrs. Calvert, 

 Skinner and Williams. 



Coleoptera. Mr. Laurent exhibited specimens of Hylotnifcs ba- 

 jitlns Lee., and the destructive work the larvae had done in a pine 

 board. The speaker cited a case at Anglesea, New Jersey, where the 

 larvae of this beetle had honeycombed the yellow pine flooring of a 

 house to such an extent that it was necessary to lay an entire new 

 floor. 



Lepidoptera. Dr. Skinner reported .-llypia octomaculata as abun- 

 dant here this year and swarming in New York. 



The following were elected to membership: Messrs. Arthur H. 

 Napier, Geo. M. Greene and J. Wagener Green. R. C. WILLIAMS, JR., 

 Recording Secretary. 



