THE ENTOMOLOGIST. 157 
by means of the setting-needle, poke all the plaster out 
again, and wash the inside of the dried skin with a solution 
of corrosive sublimate and spirits of wine. The body may 
then be filled with cotton, if thought proper. I have speci- 
wens of Dicranura vinula done in this way three or four 
years ago, which look as fresh as if bred but yesterday ; 
and the person who gave me the hint had a long series of 
Salicis, every one with bodies as white as snow.—S. JL. 
Mosley ; Almondbury Bank, Huddersfield. 
Preserving Larve.—I am glad to see entomologists are 
turning their attention to this branch of study. I do all mine 
by inflating over a spirit-lamp, and have preserved larve from 
Ligniperda down to a Depressaria, including Chrysorrhea, 
Auriflua, &c. My greatest difficulty has been with the green 
larve, such as Pieris Rape, Plusia chrysitis, &c., which not 
only lose their beautiful green tint, but assume a very ugly 
brown. I have tried colouring, both internal and external, 
but with very little success; and have many times been very 
vexed when correspondents have sent me such larve to 
operate upon, and have had to return them in such an 
unsatisfactory state. I disagree with Dr. Kuaggs, when he 
says that preserved larvae, pupe, &c., should be kept in 
cases separate from the imagos; I think it is the very use of 
them, that they should be placed side by side in the same 
drawer. I not only do this, but include the food-plant as 
well, dried in a natural position, and the lary mounted upon 
it.—Jd. 
Podalirius and Machaon.—UHaving only quite recently 
returned to England from the Continent, 1 find a large 
accumulation of the ‘Entomologist’ at my house, which 
have not been forwarded to me by my friends during my 
absence; and, upon looking over them, I see numerous 
questions and answers relative to Machaon being double- 
brooded. In the neighbourhood of Coblenz, where I have 
been for the last two years and a half, Machaon is undoubtedly 
double-brooded. I find on reference to my last year’s diary 
(1875, which was an extra good year for both Machaon and 
Podalirius, 1874 being quite the reverse) that I captured my 
first Machaon on the 13th of May, and captured them almost 
every day up to the 24th, when they ceased altogether, and 
did not reappear until August 10th, when they occurred in 
