96: Proceedings of Scientific Societies. [May 
delecta. The striped larva, which somewhat resembles that of 
Alypia octomaculata, feeds upon the leaves of Hibiscus moscheutos. 
Mr. Weeks also spoke of the effect of the weather upon the time 
of emergence of imagines from the pupal state. 
and from it radiate from three to five long and undulating gal- 
leries. The larval galleries are greatly curved. 
long, black anthers of Cassia marilandica never seem to shed 
their pollen unless the membrane at the apex is broken by humble- 
, who pierce it to get at the contents. A plant covered with 
gauze neither shed pollen nor produced seed. 
eptember 14.—Miss H.C. DeS. Abbott read a paper on Sapo- 
Nine, a compound which is always a constructive and formative 
element of the plant containing it, and one which, by its action 
On other elements, probably aids in nutrition. It is absent when 
the floral elements are simple, and increases in quantity as they 
are of higher grade. Chemical constituents are evolved part 
passu with the evolution of the plant, and are a fit basis for bo- 
tanical classification. Mi tt also called attention to two 
‘new substances obtained by her from a Honduras plant, and to 
