35 
culatus and that of the common species of Culex in that the former is 
noticeably lower in tone. The note of Culex as it approaches the ear 
Fie. 10.—Anopheles quadrimaculatus: Group of 44 eggs deposited by a single female as 
they appear resting naturally on the surface of the water—enlarged (original). 
is high in pitch; that of Anopheles is certainly several tones lower 
and of not so clear acharacter. In quality it is something between the 
buzzing of a house fly and the note of Culex. 
can at once distinguish the two genera in 
this way as he is sitting reading in the 
house, and the writer feels quite sure after 
listening to them in breeding jars that the 
statement is correct. 
These observations have been made with 
an abundance of material, nearly 100 adults 
having been under observation. 
THe EGes.—The well-known and often- 
mentioned boat-shaped masses of eggs of 
Culex are not-even remotely resembled by 
the Anopheles ovipositions, and the indi- 
vidual eggs are equally dissimilar. In the 
accompanying illustration (fig. 10) the egg 
mass of Anopheles is illustrated for com- 
parison with fig. 1. In Culex from 200 to 
Mr. Pratt states that he 
Fic. 11.—Anopheles quadrimaculatus: 
Egg from below at left, from above 
at right—greatly enlarged (origi- 
nal). 
400 eggs are laid in a mass ordinarily shaped like a pointed ellipse, con- 
vex below and concave above, all the eggs perpendicular, and stuck 
