ENTOMOLOGICAL NEWS 



AND 



PROCEEDINGS OF THE ENTOMOLOGICAL SECTION. 



ACADEMY OF NATURAL SCIENCES, PHILADELPHIA. 



Vol. vin. DECEMBER, 1897. No. 10. 



CONTENTS: 



Smith — The peach borer 233 1 Editorial 245 



Cockerel! — Physiological species 234 I Economic Entomology 248 



Skinner — A new species of Debis 236 ; Notes and News 250 



Slosson — Additional list of insects, etc. 237 i Entomological Literature 251 



Oilolengui — Types in the Neumoegen Doings of Societies 254 



collection 240 1 



THE PEACH BORER : 



Saiuiiiwidta exitiosa Say. 



By John B. Smith. Sc.D, 



The following brief life-history of this insect may be given as 

 a complement to the illustrations on Plate XI, which show the 

 sexes considerably enlarged. 



In New Jersey the hibernating larvae become mature from 

 about the middle of May to the middle of August, and begin 

 the formation of a cocoon after resting a day or two without 

 feeding. 



The cocoon is made of chips of bark, gum and excrement, 

 held together and lined inside with silk. It takes two days to 

 make it, and the larva remains in the cocoon unchanged for three 

 days at least, probably five. About twenty days thereafter the 

 adults emerge. In the laboratory the periods of emergence have 

 ranged from 21 to 30 days, though more between 25 and 28 than 

 any other period. This is the time from the beginning of the 

 cocoon to the emergence of the moth. 



The first adults were seen in Jamaica, Long Island, June 25th, 

 though a few,empty pupa cases were found at that time showing 

 that some had come out before. No moths emerged in New 



