210 ENTOMOLOGICAL SOCIETY 



to moisture changes. In Arizona, wherever an elevation of 

 5,000 feet is reached, there is rainfall and forests which are lack 

 ing at a lower elevation. Dr. Gill stated that the segregation of 

 the Coleopterous fauna of California had been remarked upon 40 

 years ago by LeConte. Mr. Schwarz stated that LeConte did 

 not go into the mountains of Arizona, and, in fact, failed to realize 

 the difference between the California and Arizona faunas, because 

 he was there in the winter-time. It is high time to explore 

 southern Arizona from a biological standpoint, since cattle are 

 fast doing away with the vegetation of the valleys and the moun 

 tain canyons, which will soon become deserts. In this statement 

 he was supported by Mr. Fernow, and some further discussion 

 ensued between Messrs. Fernow and Schwarz as to the character 

 of the vegetation of Arizona, and its influence upon insect life. 

 Mr. Ash mead confirmed Mr. Schwarz's statement as to the great 

 richness and value of the collections made by Mr. Hubbard in 

 southern Arizona. 



Mr. Banks exhibited specimens of Chrysopa ypsilon, each 

 of which carried a minute Cecidomyiid fly on its wings. The 

 specimens were collected by Mrs. Slosson in the White Moun 

 tains, and she states that it is a common habit. Mr. Banks stated 

 that the Cecidomyiids were taking advantage of the Chrysopa to 

 carry them from place to place ; that they probably in this way were 

 carried to colonies of plant-lice upon which their larvas might 

 feed. Mr. Ashmead spoke gf a parasitic wingless fly of the 

 family Borboridae living upon a snail which had been collected 

 by Mr. Cook in Liberia. He agreed with Mr. Banks's conclu 

 sions. Mr. Schwarz suggested that possibly the Cecidomyiids 

 might have become entangled upon the wings of the Chrysopas, 

 and were thus trapped and unable to get a way. Mr. Banks, 

 however, said that he had been informed by Mrs. Slosson that 

 nearly all of the flies fell oft' when the Chrysopas were captured, 

 and that, therefore, they cannot be entrapped. 



The first paper of the evening was presented by Mr. Ash- 

 mead, entitled "A new Cynipid Genus from Africa."* 



In answer to questions by Mr. Schwarz, Mr. Ashmead stated 



*After the presentation of this paper, Mr. Ashmead discovered that this 

 new genus was identical with Oberthiirella Saussure, and has withdrawn 

 his description. 



