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Doings of mobseuak 
"The Brooklyn Entomological Society met June 4th at 55 
Ave., Brooklyn, with 21 members and 9 visitors 
ppnaon including Prof. Silvestri, the eminent Italian entomolo- 
_ gist and Prof. Wm. Morton Wheeler, of Harvard University, 
r. J. J. Schoonhoven, president of the Brooklyn Institute, de- 
nent of Microscopy, was elected an active member. 
____ Prof. John B. Smith exhibited enlarged microphotographs 
of genitalia of the European Hydroecia nictitans taken by F. 
WN. Pierce of England. The latter scholar has divided the 
___ Species into four, largely on constant characters of genitalia. 
In his revision of the American nictitans a few years ago Prof. 
Smith split the species in three, much on the same grounds. 
____ Prof. Smith spoke on observations on cecropia cocoons. Of 
these 1052 had been collected for data, the sound ones being 
for the most part purposely rejected. Of one lot 9 were 
healthy, 42 parasitized and 233 dead of disease. In a second 
_ lot 152 were parasitized and 305 died before pupation. The 
parasites were Ophion and two species of Pimpla. 
The inference was that in the campaign against insect pests 
__~ most important results might be obtained through study of 
__ disease inoculation. Two species of bacterial disease were 
