March, ipisl PROCEEniNCS OF THE SOCIETY. 83 



alone, besides the Papait'ciiia, which also belongs to a genus wholly North 

 American and renowned for the discriminating manner in which its species 

 select differing, indigenous food plants. So that the evidence of these insects 

 is strongly in favor of the indigenous character of the food plant, for it has 

 no near relative in the American flora, on which the insects could have sub- 

 sisted prior to the time of the suspected introduction. 



Mr. Leng exhibited and discussed briefly " Carabidze collected in Northern 

 Forida by Messrs. Mutchler and Watson," pointing out that Cicindela nigrior, 

 C. tranquebarica var: vulgaris minor, and Platyniis ccruginosa, contained 

 in the lot, were not previously known to occur in the State. 



In reply to Dr. Lutz, he added that the fauna of the northern part of 

 the state did not otherwise difl^er strongly in Carabidse from the southern part. 



Dr. Osburn read a paper " Notes on Species of Eristalis " in which he 

 showed that the European E. arbustorum, probably confused heretofore by 

 American workers with E. nieigcnii, is especially abundant near New York 

 City, and occurs as far east as Labrador and as far west as Ohio. From 

 the absence of specinu-ns in the older collections examined he thought its 

 introduction must be quite recent. The differences between this species and 

 nieigcnii were shown by drawings of both sexes and by a long series of speci- 

 mens. He also exhibited E. rupiutn Fab., another species new to North 

 America, which had been taken at Atlin, B. C, by Mr. E. M. Anderson, of 

 the Provincial Museum, Victoria, B. C, the past summer, and E. latifrons 

 Loew, common in the western states and recently (July 15, 1908) taken at 

 Jamaica, L. I., by Mr. Engelhardt, and at Snake Hill, N. J. 



In the discussion that followed between Dr. Osburn and Messrs. Bird, 

 Da\is, Comstock and Leng, it was brought out that the separation of species 

 by obvious color characters was frequently confirmed, if valid, by the study 

 of more obscure parts, especially the genitalia, but that care was necessary 

 to avoid deceptive results from faulty preparation of material of an insuffi- 

 cient number of examples. 



Mr. Comstock mentioned the projected collecting trip to Parry Sound, 

 of Mr. H. S. Parish, at present in Toronto, No. 81 Robert St., and advised 

 those interested in obtaining material from that region to communicate 

 with him. 



Mr. Davis exhibited a new Cicada from California, to be called Okana- 

 gara ruhrovenosa. 



