Dec, 1912.] Proceedings of the Society. 303 



Descriptions of New Hymenoptera (Crawford). 



Descriptions of New Species and Genera of Lepidoptera chiefly from 



Mexico (Dyar). 

 A New Species of Celithemis (Williamson). 



By Purchase. 



Coleoptcrorum Catalogus : Cerambycidje, Cerambycinse. Staphylinidse III. 

 Ptinidae. 



Mr. Angell gave notice of his intention to move to amend the by-laws by 

 striking out of Article IX the words " he shall publish in each Journal a list 

 of additions obtained during the previous quarter." 



Dr. Osburn read a " Review of Walker's Monograph of North American 

 ^^shnas " and exhibited his own and Mr. Davis's collection of these dragon 

 flies. He said that this volume, devoted to a most thorough study of 14 species 

 and 6 varieties, was a grand piece of work, in which the material in the museums 

 of Canada, United States and foreign countries as well as in private collections 

 was reviewed, and the species were described from every point of view. The 

 larval forms, the season and length of imaginal life, the habitat, iniluence of 

 weather, enemies, food, eggs, hatching, habits, etc., were all exhaustively 

 treated. The data for migration few, one in America, one in Europe; the data 

 for seasonal variation in number, for the eight stages of nymphal growth, for 

 the length of nymphal life, placed at three years, for symbiosis, are all equally 

 complete. There is a phylogenetic tree of genera, keys for determining males, 

 females and nymphs and 130 pages devoted to complete descriptions and cita- 

 tions, 1 1 pages of bibliography, 28 plates, of which 6 are colored. Dr. Osburn 

 added that five new species had been described in a preliminary paper and the 

 nymphs of 4 species remained unknown ; also that verticalis is not a common 

 species as had been supposed. 



The collection exhibited by Dr. Osburn was identified by Walker and in 

 Mr. Davis's collection of 9 species there were three not included in Dr. 

 Osburn's personal collection. 



Mr. Engelhardt asked if specimens found in March had probably emerged 

 so early in the season. Dr. Osburn said they had and that the species seen 

 flying was probably Anax Junius. Mr. Leng asked about the distribution, which 

 Dr. Osburn said was palsearctic. 



Mr. Schaeffer remarked that there were none in the arid southwestern 

 regions, though some occurred in the mountains. 



Mr. Engelhardt spoke of the hemipteron Corynocoris typhccus as an occa- 

 sional carrion feeder. 



Mr. Pollard reported having found, while with Mr. Bischoff at Ramsey, 

 N. J., a CaJligrapha similar to C. atnelia Knab abundant on alder and commented 

 on the remarkable difference in the sexes. 



Mr. Hall presented Arctia figurata found at Runyon, N. J., May 19, to the 

 local collection. 



Mr. Shoemaker presented Onthophagus nuchicornis and Sphcrridiuin bipns- 

 tulatum, found near East New York on May 4 and May 20. 



