The surest and safest way to avert the menaces to human health and comfort which are presented by the mosquito lies in its eradication. However ideal diverse plans for this purpose may be, even the most enthusiastic hygienist will admit that they cannot be carried out except by a long, carefully conducted antimosquito campaign which will extend over years rather than days or weeks. Meanwhile, occasions arise when individuals and groups of men must be protected, if possible, from the annoyance and the dangers of mosquito bites. Here, as in so many other instances, wartime conditions have pointed to the urgent need. Troops compelled to travel through malarious regions, soldiers posted in places where mosquitoes abound, and civilians driven into the abodes of these insects, may demand immediate, though only temporary, protection.
The enemy which cannot be destroyed can sometimes be repelled. Herein lies the usefulness of the culicifuge—a preparation