June, 19-0.] ProCKKDINGS OK THE SOCIETY. \ 195 



Dr. Lutz spoke on " A Collecting Trip in Colorado," illustrating his re- 

 marks with a topographic sketch of the State and with many photographs 

 shown on the screen by the projectiscope. He pointed out that the environ- 

 mental factor was often overlooked in distribution data; and that his object 

 had in part been to correct this for Colorado, a State in which, from its high 

 mountains. Boreal and Transition zones occurred interrupted by four Sonoran 

 areas as shown in Biological Survey of Colorado by Merritt Cary (Xo. Amer- 

 ican Fauna No. 33, U. S. Dept. Agl. Washington, 191 1). 



In carrying out this object, between June 3rd and August 20th, 29 dif- 

 ferent stations for collecting were established, including Lamar, Springfield, 

 Regnier. Trinidad, W'alsenburg, Alamosa, Bondad, Mesa Verde, Ridgeway, 

 Grand Junction, Denver and Wray in the Sonoran; Monte Vista, Durango, 

 Mancos, Rifle, Meeker, Glenwood Springs and Boulder in more or less Transi- 

 tion areas ; South Fork, Pagosa Springs in more markedly Transition and 

 Continental Divide, Electra Lake, Telluride, Ouray, Aspen, Tennessee Pass, 

 Leadville and Ward in the more elevated Canadian and Hudsonian zones. The 

 elevation at which .the cooler zones occur are greater on the southwestern 

 slopes than on the northeastern, so that the Transition begins at about 5,600 

 feet in one case, but not until 7,800 feet is reached in the other. 



Dr. Lutz traced the distribution of certain species of Boinbus in par- 

 ticular and showed specimens of the flowers and trees as well as the insects, 

 closing by pointing out that though 500,000 specimens with ecological data had 

 been gathered in the last ten years, they were only samples from selected 

 places ; and every group worked up by members become stones in the bridge 

 from hazy notions to more perfect knowledge of distribution, the Museum was 

 trying to build. 



Mr. Shoemaker exhibited " Miscellaneous Beetles taken last Summer " 

 principally at Washington, D. C, and on Slide Mountain in the Catskill Moun- 

 tains, the latter including a number of northern forms. Mr. Hallinan spoke of 

 the Lepidoptera of Panama, particularly in reference to migration. 



Dr. Bequaert commended the minute details accumulated on the migration 

 of swarms of tropical butterflies. 



Mr. .\hgell si)oke of winter collecting of longhorns on hickory fire wood. 



