144 
PROCEEDINGS OF THE NATURAL [APRIL,'88. 
mously approved. All future publications addressed to the 
Wisconsin Natural History Society and all exchanges, it was 
decided, should be given over to the Public Museum Library 
on the condition that that institution would carry on the 
exchanges of the society and on the further condition that 
members of the society should be permitted to consult the 
library when they felt so inclined. 
Hereupon followed the lecture of the evening. Mr. W. M. 
Wheeler gave the results of some months of investigation on 
the development of the Croton Bug (Blatta Germanica). The 
insects development was traced from the formation of the 
ovarian egg to hatching. Mr. Wheeler illustrated his lecture, 
which was necessarily much condensed, with blackboard, 
drawings of the embryos in different stages. 
At the close of the lecture Prof. G. W. Peckham offered 
some remarks on animal development in general. 
The following papers were read by title: “A Continuation 
of t he List of Wisconsin Coleoptera,” by Mr. F. Rauterberg ; 
The Flora of Milwaukee County,” by W. M. Wheeler. 
