9 
will make a roomy bar for a double bed. The 90-inch, medium-mesh bobinet should retail 
for from 30 to 35 cents a yard, depending upon the quality. 
The mosquito bar should be drawn about the bed before nightfall and should be tucked 
beneath the mattress inside the head and foot boards. Care should be taken that no mosquitoes 
are inclosed in the process. Then mosquitoes resting beneath the bed can not find an entrance 
to the inside of the bar. 
With attention to screening the living quarters and the laboratory and providing an effi- 
cient bar over the bed, the danger of exposure to infection will depend upon the care taken 
in entering and leaving the house, in the places visited after nightfall, and especially upon the 
protection found when spending the night away from headquarters. When traveling, a field 
man may carry a mosquito bar with him to good advantage. The size of the bar for use in 
travel can be greatly reduced from that given for use at headquarters. Eight yards of the 
72-inch bobinet gathered to a smaller piece of muslin will make a practical bar. The weight 
is not an item, as the bar adds little to the luggage to be carried. The frame is not important. 
Two light strips of wood crossed in the middle and reaching from corner to corner of the muslin 
and hung by the middle with a cord to a small hook in the ceiling can be used, or extra lengths 
of tape can be sewed to the corners of the muslin and used to hold the bar over one’s bed by 
attachment to the head and foot boards, backs of chairs, light fixtures, or fastened to the walls 
with small tacks. If a bar is not carried by the traveler he should by all means have in his 
bag a needle and thread for use in repairing the nets he finds in the hotels. 
If mosquitoes make their way into the screened house through carelessness of servants 
or otherwise, they should be searched for and killed. If the covering of the walls is of a light 
color, the mosquitoes are more readily observed. 
In riding after nightfall, especially in buggies or in autos, a person is liable to exposure 
from the mosquitoes resting in the vehicles, the attack being usually about the ankles. For 
this reason, and on general principles, it is best to wear high-top shoes during the summer 
season in a malarial region. , 
In some cases the circumstances may make it necessary to depend upon repellents. <A 
number of these are described in the bulletins referred to earlier. 
Frequently Anopheles mosquitoes make their way into sleeping cars when they are opened 
for cleaning and are imprisoned when the screens are lowered. Throughout the season when 
Anopheles are active it is a good plan to turn on the berth lights before retiring and find and 
destroy any mosquitoes that may be present. 
It will probably be impractical for field men to attempt the prevention of the breeding of 
mosquitoes over any wide area in the region in which they are located, but often a great deal 
can be done and relief secured by attention to the breeding places in the immediate vicinity of 
the living quarters or laboratory. 
TROPICAL AND SUBTROPICAL INSECT INVESTIGATIONS. 
C. L. Martarr, In charge. 
Dr. E. A. Back and Mr. C. E. Pemberton are hoping to practically complete their research 
work on the Mediterranean fruit fly (Ceratitis capitata Wied.) in Hawaii by June 30. A good deal 
of time has been spent this spring studying the fruit-fly conditions, especially from the stand- 
point of temperature, at different elevations on the island of Hawaii, where a total elevation 
of 14,000 feet above sea-level is reached. In connection with this study other insects damaging 
coffee in this district have been investigated. It will be interesting to members of the Bureau 
of Entomology to know that one of the fruit-fly parasites introduced by Dr. Silvestri, working 
