100 A. M. Mayer—Researches in Acoustics. 
scopical Society, entitled “ Auditory Apparatus of the Culex Mos- 
guito, by Christopher Johnson, M.D., Baltimore, U. S.” 
In this excellent paper I found clear statements showing 
that its talented author had surmised the existence of some o 
the physical facts uae y experiments and observations have 
confirmed. o show that — facts conform to the hy- 
pothesis that the snieaiad e the auditory organs of the 
mosquito,* I cannot do besser” “sha quote the following from 
Dr. Johnson’s paper 
* While bearing i in mind the difference between feeling a 
noise and perceiving a vibration, we may safely assume with 
Carus—for a great number of insects, at least,—that whenever 
true auditory organs are developed in them, their seat is to be 
found in the neighborhood of the sacri That these parts 
themselves are, in some instances, concerned in collecting and 
transmitting sonorous vibrations, we hold as catablisht by 
the observations we have made, particularly upon the Culex 
mosquito ; while we believe, as Newport has asserted in general 
terms, that they serve also as tactile organs. 
“The male mosquito differs considerably, as is well known, 
from the female; his body being smaller and of a darker color, 
A short time before on death of my friend, Prof. Aaaesin, he wrote me these 
words: “I can ha ee yaagar! By! deli ight at reading your letter. I feel you 
have hit u phan one of the most fertile mines for the Gr tieion of a Bn ne 
somes to ee day is a > ae to naturalists, the seat of the organ of h in 
culate 
