106

Early reference to malaria, 106; its general distribution, 106;
theories in regard to its cause, 107; insects early suspected, 107;
_The parasite that causes malaria_, 108; studies of the parasite,
108; _Life-history in human host_, 109; its effect on the host, 110;
the search for the sexual generation, 111; _The parasite in the
mosquito_, 112; review of whole life-history, 115; malaria transmitted
only by mosquitoes, 115; _Summary_, 117; experimental proof, 118.

CHAPTER VIII

MOSQUITOES AND YELLOW FEVER 120

A disease of tropical or semi-tropical countries, 120; outbreaks in the
United States, 120; parasite that causes the disease not known, 121;
formerly regarded as a contagious disease, 122; _The yellow fever
commission_, 123; Dr. Finlay's claim, 124; experiments made by the
commission, 125; summary of results, 129; what it means, 130; _results
in Havana_, 131; _the fight in New Orleans_, 132; _In the Panama canal
zone_, 135; _in Rio de Janeiro_, 136; claims of the French commission,
138; _habits of stegomyia_, 139; breeding habits, 139; possible results
of war against the mosquitoes, 139; Danger of this disease in the
Pacific Islands, 140.

CHAPTER IX

FLEAS AND PLAGUE 142

Great scourges, 142; the "black death," 142; old conditions
and new, 143; _How plague was controlled in San Francisco_,
143; _Indian Plague commission_, 144; Dr. Simond's claim,
145; The advisory committee and the new commission, 146;
_Results of Dr. Verjbitski's experiments_, 147; _Results of various
investigations_, 150; _structure and habits of fleas_, 151; feeding
habits, 152; _Common species of fleas_, 153; _Ground squirrels and
plague_, 155; squirrel fleas, 156; _Remedies for fleas_, 157; cats
and dogs, 159.

CHAPTER X

OTHER DISEASES, MOSTLY TROPICAL, KNOWN OR THOUGHT TO
BE TRANSMITTED BY INSECTS 161

_Sleeping Sickness_, 161; its occurrence in Africa, 161; caused by a
Protozoan parasite, 162; the tsetse-fly, 163; _Elephantiasis_, 164;
caused by parasitic worms, 164; their development, 165; how they are
transferred to man, 165; effect on the patient, 166; _Dengue_, 168;
other names, 168; probably transmitted by mosquitoes, 170;
_Mediterranean fever_, 171; cause, 171; may be conveyed by mosquitoes,
171; _Leprosy_, 171; caused by a bacteria parasite, 171; possibilities
of flies, mosquitoes and other insects