Jan., '07] ENTOMOLOGICAL NEWS. 29 



Mr. Matthews exhibited specimens of Periplmieta amcri- 

 cana. and related his experience in trapping them. He showed 

 winged and wingless forms. 



Henry Skinner, Secretary. 



A meeting of the Entomological Section of the Academy of 

 Natural Sciences of Philadelphia was held September 27, 1906, 

 Dr. D. M. Castle presiding. Thirteen persons were present. 



Dr. Skinner exhibited a bred $ of Platysamia glovcri from 

 the Huachuca Mountains, Arizona, and spoke of the differences 

 between its larva and that of cecropia. He also exhibited 

 Hcpiahis tliule, a rare species found at Montreal, Canada. 



Mr. Daecke said he had located some pitcher plants at Toms 

 River, New Jersey, and determined to examine them this sea- 

 son for Papaipema appassionata. He found the workings 

 < m September 22d, and exhibited them, but was too late in 

 the season to get imagos. He also called attention to a method 

 of making double mounts and exhibited the process. Num- 

 ber 00 black pins are put through the insect in the ordinary 

 way ; the pin is bent at a right angle under the insect and 

 then pinned into a small piece of polyporus fungus which is 

 on the larger pin. The excess of the small pin is removed 

 with cutting pliers. 



Mr. Yiereck said during the summer he had been delegated 

 by Dr. Samuel G. Dixon, Commissioner of Health, to make 

 a mosquito survey of Pennsylvania. He had one assistant, Mr. 

 J. Irwin Zerbe. The principal object in view was to combat 

 malaria, and all the principal cities were examined. Attention 

 was also given to a typical Canadian zone town in Sullivan 

 County, and especial attention was given to the valley of the 

 Susquehanna, as all evidence seemed to point to this being 

 the strategic river valley in the crusade against malaria in 

 the State. Culex pipiens was found breeding by the billion 

 where no Anopheles could be found, but in this case the water 

 was adulterated from refuse discharged by a glue factory. 

 This is possibly the reason for the paradox here. In the acid 

 waters and the oily waters of the coal and oil regions, respec- 

 tively, no mosquitoes of any kind were found, nor were mos- 

 quitoes found breeding in certain cities where every depression 



