158 Journal New York Entomological Society, t^'o'- xxiil. 



Mr. Dickerson presented a list of Geometrids captured at Fourth Lake in 

 the Adirondacks a few years agOj and identified for him by the late John A. 

 Grossbeck, which list is attached, and commented on the activity of one of the 

 species A. vestaliata. 



Meeting of April 6, 1915. 



A regular meeting of the New York Entomological Society was held April 

 6, 191S, at 8:15 P.M., in the American Museum of Natural History, Vice- 

 President Harry G. Barber in the chair, with fourteen members and two 

 vistors, Andre Avinoff, Fellow of the Entomological Society of London and 

 member of the Russian Entomological Society, and Dr. Wm. A. Riley, of Cor- 

 nell University, present. 



The curator reported a donation of seven specimens of Noctuida from 

 Mr. Shoemaker. 



Mr. Dow, for the Field Committee, gave the details of an outing planned 

 for April 11 to Central Park, L. L, and of one planned for May 31 to Beaver 

 Swamp. 



Dr. Lutz having withdrawn in favor of Mr. Avinoff, that gentleman spoke 

 on the distribution of butterfles in Central Asia, particularly as exhibited 

 during his own travels in Cashmere, Thibet and Turkestan. The speaker 

 referred to the difficulty of tracing the southern frontier of the Palsearctic 

 region in Central Asia, especially in its eastern portion, where it meets the 

 Chinese-Indo-Malayan region in an irregular line, at varying elevations in the 

 mountains. 



Numerous illustrations, drawn from his experiences in collecting butter- 

 flies, were given of the height at which the palsearctic species were found in 

 Cashmere, where everything above 6,000 ft. is palsearctic, in Nepaul at 9,000 

 ft., and in the Himalayas at 14,000 ft. Mr. Avinoff said he had found butter- 

 flies numerous at 18,600 ft. in the Himalayas, in August, when at that elevation 

 there was no snow ; and specimens of Parnassius were exhibited. Continuing 

 he spoke of the Thibetan fauna as exhibited in the large collections made for 

 Charles Oberthiir by a Catholic missionary, all evidently taken at compara- 

 tively low levels, being Indo-Malayan in character; the level at which the 

 palsearctic species would be found in Thibet is not definitely known, but esti- 

 mated at 12,000 feet. 



A comparison of the European fauna, where the mountains of the Pyre- 

 nees, Alps and Carpathians make a more definite boundary for the palsearctic 

 (though elevated portions of northern Africa must be included), with the 

 Asiatic was made, and the great similarity between Russia in Europe and in 

 Asia was pointed out, the Ural Mountains forming no barrier of consequence ; 

 a line drawn north from Lake Baikal being a vague but more correct boundary 

 between eastern and western forms. The Ethiopian region, the Mediterranean 

 region, reaching eastward to the Crimea and plains of Turkestan and even to 

 Quetta in Hindostan, and the Boreal region bordering the Arctic Ocean and 

 exhibiting American relationships in northeastern Asia were also mentioned, 

 as well as the wonderful variety of butterflies in the mountains of Turkestan, 



