IOWA ACADEMY OP SCIENCES. 
51 
bolteri, Deitz, Iowa City. 
rufipes, Lee., Iowa (Dietz). 
subg-uttatus, Deitz, Iowa (Angell). 
ligatus, Deitz, Iowa (Angell). 
Pseudanthonomus facetus, Deitz, Iowa (Angell). 
Tychuis sordidns, Lee., Iowa (Casey). 
Ceutorliynchus cyanix^ennis. 111., Iowa City. 
Baris dolosa, Casey, Iowa (Casey). 
confinis, Lee., Iowa City. 
transversa. Say, Iowa (Casey). 
Pseudobaris angustula, Lee., Iowa (Casey). 
Nieentaus ingenuus, Casey, Iowa (Casey). 
Centrinus falsus, Lee., Iowa (Casey). 
Limnobaris dex^lanata, Casey, Keokuk (Casey). 
eonfinis, Lee., Iowa (Casey). 
Idiostethus ellixDSoideus, Casey, Iowa (Casey). 
Catapastus eonsx^ersus, Lee., Iowa (Casey). 
Euryssobia eehidna, Lee., Iowa (Casey). 
Calandriclas. 
Cossonus subareatus. Boh., Eddyville (Shimek*). 
Scolytidse. 
Hylesinus ox)aeulus, Lee., Iowa City. 
Phlceotribus frontalis, Zimm., Iowa (Leeonte & Horn). 
A KYMOGRAPH AND ITS USE. 
BY W. S. WINDLE. 
The science of physiology in its present condition owes much 
of its advancement to the skillful manipulation of cunningly 
devised apparatus. Without the successful invention of deli- 
cate mechanical appliances many of the profound researches of 
Foster, Du Bois, Raymond, McKendrick, Martin and others 
would never have been possible. It must be granted, however, 
that invention and skill in manipulation have been supplemented 
by clear and comprehensive interpretation of results obtained, 
and it is to the latter that most credit is due. In emphasizing 
the value of scientific apparatus and its use, we recognize the 
imperative need of a fundamental knowledge in anatomy, his- 
tology, chemistry and physics, which the pupil must necessa- 
rily possess before entering upon advanced work in the science 
