The Death-Dealing Insects and their Story. By C. Conyers Morrell.
(H.A.W. Offices, Manchester. ls. net.)—This is a popular account of the most recent discoveries in tropical medicine and sanitation. Here is a brief description of how the mischief is done. A blood-sucking insect, say the anopheles mosquito, pierces the skin of a man and takes a meal of his blood. If the man is suffering from a disease caused by malaria parasites, some • of these parasites are taken into the stomach of the mosquito. These find their way into the animal's proboscis, and from this when he takes another blood meal, this time from a healthy individual, he communicates the disease. All mosquitoes are not of this dangerous variety, which may be detected by its attitude, the body and proboscis being almost at a right angle to the wall on which the insect sits.
Previous page
