230 ENTOMOLOGICAL NEWS. [Sept., 'o2 



sheep dip, is thoroughly effectual, making the great amount 

 of lime called for by the formula unnecessary, thus reducing 

 the cost of material as well as the difficulty of application. 



4. Frequent light rains seem to be advantageous for the 

 destruction of the young scales. 



5. A coating of lime has little or no value in preventing the 

 attachment of the young scales. 



If possible, additional tests will be made during the dry 

 season to determine whether the young scales will be destroyed 

 to the same extent in the absence of rain. 



Doings of Societies. 



A meeting of the American Entomological Society was held 

 June 26th, Dr. P. P. Calvert, President, in the chair. Fifteen 

 persons were present. Mr. Huntington exhibited some Dip- 

 tera which had been sent in butterfly papers and had arrived 

 in good condition. Mr. Johnson said he had received Crior- 

 rhina rcrbosa from Olympia, Washington. Mr. Huntington 

 had also received it from Vancouver. 



Dr. Skinner exhibited specimens of Cicada scptcndccim var. 

 cassini. 



Mr. Wenzel spoke of finding the chimneys of the periodical 

 Cicada at Castle Rock, Pa., and asked if reason for these for- 

 mations had been discovered. 



Mr. Johnson said he had found chimneys in burnt-over land 

 and on low land. The hills nearby did not contain any. It 

 was the sense of the meeting that the adults of this species in 

 question do not feed. Observations had been made to try and 

 discover adults feeding. 



Mr. Hornig exhibited a gall found on the stem of a chest- 

 nut-oak. The speaker also described the feeding habits and 

 moults of the larva of Actias litna which were fed on sour gum. 



Dr. Castle spoke of the influence of under-feeding on the 

 determination of sex. 



Mr. Laurent exhibited a specimen of Hemerophila unilaria 

 taken at Mt. Airy, Philadelphia, at light, on June 22nd. He 

 believed it to be the second record for Pennsylvania. 



