93 
ing, about sunrise. On several occasions a number of noninfected 
insects were let loose in the laboratory and we observed that upon ris¬ 
ing at sunrise they attacked us viciously. 
It may be noted that this fact apparently explains the danger to 
persons sleeping in an infected house and the comparative freedom 
from danger in daylight communication with an infected town, 
especially if the person remains in the open air and sunlight and 
avoids houses, and confines his visits to the streets and parts of the 
town free from the disease. 
A number of experiments were made with the female Culex pun- 
gens , but they could not, under any circumstances, be induced to feed 
upon blood while in confinement. It was found that they preferred 
death. 
MOSQUITOES MAY BITE CADAVERS. 
The female Stegomyia faseiata will bite a cadaver, and, if on a 
dependent portion, can draw blood. We have two observations on 
this point. 
Narciso Nadal (case XX). A number of Stegomyia’ were applied twelve 
hours after death, only one of which apparently obtained blood. 
Trinidad Martinez (case XXII). A number of female Stegomyia faseiata 
were applied one-half hour after death, and three insects succeeded in feeding 
with blood. 
As it has been shown b}^ the work of the French commission that 
the blood of yellow fever is not infective after the third day, the 
danger of conveying the infection by means of mosquitoes feeding 
upon cadavers must be exceedingly remote. 
Longevity. 
Several experiments were undertaken to determine the fact whether 
the male Stegomyia faseiata , as has been stated, has a brief life his¬ 
tory. We have one experiment showing that the male mosquito may 
live and thrive over a month. 
Observation .—A number of male mosquitoes were placed in a cage October 
10 and subsequently fed on sirup. They were all alive and in good- condition 
on November 15, when they were killed and used for experimental purposes, 
having lived thirty-six days. 
Ovipositing. 
Sometimes the female Stegomyia faseiata will lay a considerable 
number of eggs at one time and then die. 
Observation .— (Mosquito XLIII. Francis, Re. No. 4.) This female Stego¬ 
myia faseiata was taken from the breeding jar on October 3, fed on normal 
blood October 4, 6, 7, 8, and 10, then placed in a jar with water to tempt ovi¬ 
positing, and banana feeding begun. On October 10 four males were added to 
the jar. On October 23 the female was given another blood feed. On the 26th 
