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illness. Slie was subsequently fed on sirup. On November 1, placed in a cage 
with a beaker of water and two males. She laid 12 eggs on November 4, which 
subsequently hatched. 
(Mosquito LVI1I-32. Sesoleda Martinez, Rx. b.) This female Stegomyia 
was separated from the breeding jar October 19. Fed upon the blood of Sesoleda 
Martinez, a fatal case of yellow fever October 20, the fourth day of his illness. 
Subsequently this insect was given banana. October 28 a normal blood feed. 
On November 5 a beaker of water was placed in the cage to tempt ovipositing. 
Four days later, November 9, she laid 26 eggs, which subsequently batched. 
The statement has been made that the female Stegomyia fas data, 
and mosquitoes generally, require a feeding on blood in order to lay 
eggs. In three experiments tried by us we are able to confirm this 
statement so far as the Stegomyia fasciata is concerned. The insects 
were fed on sirup and banana, but could not be tempted to lay eggs. 
Observations.—Banana feeding. A large number of male and female Stego¬ 
myia fasciata that bad been fed on banana for fourteen days were given a 
beaker of water to tempt ovipositing. They were left nine days; No eggs laid. 
They were then killed for section. 
Sirup feeding. A large number of male and female Stegomyiw that had been 
fed on sirup for fourteen days were given a beaker of water to tempt ovipositing. 
They were observed twenty-one days later. No eggs were laid. 
Banana and sirup feeding. A large number of male and female Stegomyiw 
were given alternate feedings of banana and sirup for tliirty-two days, at which 
time a beaker of water was placed in their cage to tempt ovipositing. They 
were observed nine days later. No eggs were laid. 
Unconjugated females do not lay eggs. 
Observations.—Stegomyiw pupae were isolated and placed in separate small 
bottles so that the imagoes could not be kept in strict quarantine. Six of these 
unconjugated females were given a feeding of blood twenty-four hours after 
birth, and were subsequently fed on banana. They were kept in a cage with a 
beaker of water to tempt ovipositing. Five days subsequently they were given 
a second feeding on blood. Twenty-five days later they were killed, not having 
laid eggs. 
Size of Screening. 
It is of considerable practical importance in quarantine and public 
health work to know the size of screening that will keep out the 
Stegomyia fasciata , and as no accurate observations upon this subject 
had been made, with which we were familiar, we conducted a few 
experiments to determine this point. 
Screens with a varying number of meshes to the inch were placed 
over breeding jars, and banana, sirup, and other food placed on the 
other side so as to tempt the hungry insects to pass through. These 
experiments were arranged by placing the fruit and food in a jar 
which was inverted over the breeding jar. A piece of gauze or net¬ 
ting was inserted between the two jars so that the Stegomyice would 
have to pass through its meshes in order to apear in the upper jar. 
We found that both male and female Stegomyice may pass a wire 
