480 General Notes. [May 
each containing sixty-four pages). Valuable exsiccati now 
publishing are: Ellis & Everhart’s “North American Fungi”; 
Linhart’s “ Ungarus Pilze”; “ Der Belgischen Muscineen,” by 
Aigret and François; Wittrock and Nordstedt’s “ Algæ Aquz 
Dulcis Exsiccate”; Krieger’s “Fungi Saxonici Exsiccati”; 
Winter’s “Fungi Europzi et Extraeuropei Exsiccati.”’ 
Recent catalogues of botanical works which will prove valuable 
to botanical book-buyers are as follows: “ A Catalogue of Bo- 
tanical Works,” by Dulan & Co., 37 Soho Square, London; 
“ Bulletin Trimestriel des Sciences Naturelles” of Paul Klinck- 
sieck, 15 Rue de Séores, Paris; “ Katalog No. 202, 
rich Lesser, of Breslau; “ Verzeidenis von Werken aus dem 
Gesamtgebeite des Botanik,” von List & Frank, Leipzig; Koeh- 
ler’s “ Katalog No. 448” (Flor, Anatomia et Physiologia Plan- 
tarum, Phanerogame, etc.) and No. 449 (Cryptogamz), Leipzig. 
ENTOMOLOGY. 
On the Emergence of a Caddice-Fly from the Water.— 
Wh 
extended at right angles to the body like a pair of oars. The 
insect was unable to crawl up the vertical side of the aquarium, 
and after clinging to it for a short time it would lose its hold and 
sink back to the bottom. After watching it for a time I lifted it 
from the water by means ofa stick. At this time its wings were 
in the form of pads, which were but little, if any, longer than the 
wing-pads of the pupa, as shown by the cast pupa-skin found 
floating on the water. The instant the creature was free from 
the water its wings expanded to their full size, and immediately 
it flew away several feet. In my efforts to catch the insect I 
found that it had perfect use of its wings, although they were so 
recently expanded. The time required for the insect to expand 
its wings and take its first flight was scarcely more than one 
second ; it was certainly less than two. As these insects nor- 
mally emerge from rapidly-flowing streams which dash over 
rocks, it is evident that if much time were required for the wings 
to become fit for use, as is the case with most other insects, the 
wave succeeding that which swept them from the water would 
sweep them back again and destroy them.— F. H. Comstock. 
Destruction of the Codlin-Moth by Arsenical Poisons.— 
In the first of a series of bulletins to be published by the State 
* This de is edited by Prof. J. H. Comstock, Cornell University, Ithaca, 
om y ' ee gress x 
N. Y , to w. tE, should be sen 
