_Anopheles punctipennis_.—Wings with black costa showing yellow spots at apical third and at apex. The apical spot involves the first long vein and upper branch of first fork cell. The larger spot at the apical third passes through the first long vein and to the second vein just before it branches. In _A. pseudopunctipennis_ the markings are as above but the fringe has yellow spots. _Myzomyia funesta_.—Wings with four yellow spots on a black costa and two black line spots on third longitudinal vein. Palps with three white rings. Proboscis unbanded. Legs with faint apical bands. _Pyretophorus costalis_.—Costa black with five or six small yellow spots. Palps with two narrow white bands and white tip. Femora and tibiae with yellow spots. Apical tarsal bands. _Myzorhynchus pseudopictus_.—Black costa with two pale yellow spots. Wing fringe unspotted. Black palps with four pale bands. Apex of palps white. _Nyssorhynchus fuliginosus_.—Black costa with three large yellow spots. Numerous black dots on the longitudinal veins. Palpi black with white tip and two narrow white bands. Last three hind tarsal segments white. _Cellia argyrotarsis_.—Black costa with two distinct and several smaller white spots. While anophelines are usually rural or at any rate preferring the suburbs of cities yet we can differentiate between domesticated and wild anophelines, these latter keeping away from man and consequently not playing a transmitting rôle. Another factor in their becoming an efficient host appears to rest in the feeding habits of such anophelines, one which is voracious and fills and then ejects by rectum the blood taken from the malarial patient is more apt to be a transmitter than a species less greedy. By an _efficient host_ is meant a species in which full development of the parasite takes place. LIFE HISTORY OF THE MALARIAL PARASITE Malaria can be transmitted by subcutaneous or intravenous injection of the blood of a patient with the disease into a well person, the same type being reproduced. =Transmission of Malaria.=—Such a method of transmission is only of scientific interest and the regular method is as follows: An infected anopheline at the time of feeding on the human blood introduces through a minute channel in the hypopharynx the infecting sporozoite of the sexual cycle. When man is first infected by sporozoites we have starting up a nonsexual cycle (schizogony) which is completed in from forty-eight to seventy-two hours, according to the species of the parasite. The falciform sporozite bores into a red cell, assumes a round shape and continues to enlarge (schizont). Approaching maturity, it shows division into a varying number of spore-like bodies. At this stage the parasite is termed a merocyte. When the merocyte ruptures, these spore-like bodies or merozoites enter a fresh cell and develop as before.