xxxiii, '22] ENTOMOLOGICAL NEWS 191 



Doings of Societies. 



The American Entomological Society 



Meeting of June 6, 1921, at The Academy of Natural Sciences of 

 Philadelphia. Twelve persons present, Dr. Skinner presiding. 



ODONATA. Dr. Calvert exhibited specimens of the true Gomphus 

 dilatatus Rambur which has been found only in Georgia and Florida ; 

 also specimens from Weaver, Perry County, Pennsylvania (by the late 

 Erich Daecke) and other northern states, which have passed for dila- 

 tatus but are specifically distinct and for which the name lineatifrons 

 is proposed; also specimens of G. vastus Walsh which is the northern 

 and smaller representative of the true dilatatus. The differences be- 

 tween these three were briefly discussed. [The full statement appears 

 in a paper which has since been published in the Transactions of the 

 Society, xlvii, pp. 221-232. J He remarked that fast us is a smaller 

 form than dilatatus and asked for discussion on this point. Mr. Rehn 

 said that in birds and mammals southern forms were smaller, while in 

 grasshoppers they were larger. Mr. Hebard spoke on possible influ- 

 ence of richness of vegetation on size and remarked that the same 

 influence is seen in ascending mountains. 



LEPIDOPTERA. Dr. Skinner stated that in butterflies the southern 

 forms were larger and that Papilio tunius in Alaska was but half the 

 size of tHose in the southern states. He discussed the various forms of 

 In nuts and whether they are species or not. 



Mr. Hebard remarked that two forms might be distinct in two local- 

 ities and yet converge to the area where intermediates are found. 

 When the opposite is true there is no change even though the specie? 

 are quite similar. In such cases they change from one form to the 

 other without overlapping. Mr. Rehn remarked that the area of inter- 

 gradation is usually narrow and that forms do not gradually merge 

 over extensive territories. 



Comments by Mr. Williams followed. Mr. Laurent noticed that 

 Florida forms of Lepidoptera were usually larger. Dr. Skinner stated 

 that there was plenty of food for tunius there, cherry and tulip poplar. 

 ORTHOPTERA. Mr. Rehn exhibited specimens of the two species of 

 Ilcm'uncrus and made some remarks on the family Hemimeridae, touch- 

 ing on the structure, habits and distribution of the species and the 



history of our knowledge of these remarkable insects. DAVID HAR- 

 ROWER, Recording Secretary. 



Meeting of October 26, 1921, at the Academy of Natural Sciences of 

 Philadelphia. Members present, 8 and one visitor, Dr. Skinner pre- 

 siding. 



LEPIDOPTERA. Mr. Davis presented a colony of cocoons of Apantclcs 

 Itictt'icolor Yier., a parasite of the Gypsy and Brown Tail Moths in New 

 England, and he spoke of the introduction of these parasites in 1914- 

 1910, and the apparent success of various parasites introduced for these 



