98 THE CANADIAN ENTOMOLOGIST. 



the consistence of thick cream. With this I give the first coat to the 

 cork, rubbing the stuff with my hand well into the little holes of the cork 

 until these are all closed up. As soon as dry I give it another coat, using 

 the white wash somewhat thinner, and apply with a brush. 



Since using it I have never found a single specimen of the tiny paper 

 louse in my cabinet, while prior thereto these pests gave me a good deal 

 of trouble. Anthienncc also give me hardly any' trouble, as their places 

 of retreat, the cracks and worm holes in the cork, are entirely covered up 

 with the zinc. 



If applied carefully it will have just as even an appearance as paper, 

 and the white will keep fresher and cleaner than paper. Give it a trial. 



Edw. L. Graef, Brooklyn, N. Y. 



erratum, etc. 

 Dear Sir,— 



P. 59, vol. 10, line 17, for Euprcpia judica read Euprcpia pudica. 



During the latter days of March I saw Pieris rapes in considerable 

 numbers at Asheville. N. C. ; and on April 2nd I saw many scores of 

 s£t/ii//a bathy Hits S. & A., near the same place, the elevation of the spot 

 being between 4,000 and 5,000 feet. 1 hese were playing around damp 

 places by the road side. I was informed by the farmers that Doryphora 

 io-lincata had never yet appeared there. 



W. V. Andrews, Brooklyn, N. Y. 



Dear Sir, — 



A scientific friend who attended the last monthly meeting of the Ento- 

 mological Society in Boston, wrote to me the next day of a very interesting 

 communication made by Dr. Packard on the exodus of a luna moth. Me 

 " heard a rustling in the cocoon and a curious cutting sound, and saw two 

 black points sticking out, which worked back and forth, cutting the silk 

 until a slit was made large enough for the moth to crawl through. Then 

 he discovered that the black points were two spines on the submedian 

 nerve of the fore wings. As the wings expand these spines become 

 covered with the wing scales and do not show." Dr. Packard said these 

 spines exist in nearly all the Bombycida;, but he did not find that this use 

 of them had been mentioned in any of the treatises to which he had time 

 to refer, it being supposed that moths work their way through the silk, first 

 softening it by a liquid exuded from the mouth. 



