CONTENTS 
CHAPTER I 
INTRODUCTION... 1-5 
Early suggestions regarding the transmission of disease by insects. 
The ways in which arthropods may affect the health of man. 
CHAPTER II 
ARTHROPODS WHICH ARE DIRECTLY POISONOUS. 6-56 
The Araneida, or Spiders. 
The tarantulas. Bird spiders. Spiders of the genus Latrodectus. Other 
venomous spiders. Summary. 
The Pedipalpida, or whip-scorpions. 
The Scorpionida, or true scorpions. 
The Solpugida, or solpugids. 
The Acarina, or mites and ticks. 
The Myriapoda, or centipedes and millipedes. 
The Hexapoda, or true insects. 
Piercing or biting insects poisonous to man. 
Hemiptera, or true bugs. 
The Notonectidee or back-swimmers. Belostomidae or giant water- 
bugs. Reduviidae, or assassin bugs. Other Hemiptera reported 
as poisonous to man. 
Diptera; the midges, mosquitoes and flies. 
Stinging insects. 
Apis mellifica, the honey bee. Other stinging forms. 
Nettling insects. 
Lepidoptera, or butterflies and moths. Relief from poisoning by nettling 
larvae. 
Vescicating insects and those possessing other poisons in their blood plasma. 
The blister beetles. Other cryptotoxic insects. 
CHAPTER III 
PARASITIC ARTHROPODS AFFECTING MAN. 57-130 
Acarina, or mites. 
The Trombidiidse, or harvest mites. 
The Ixodoidea, or ticks. 
Argasidae. Ixodidae. Treatment of tick bites. 
The mites. 
Dermanyssidae. Tarsonemidae. Sarcoptidae, the itch mites. Demode- 
cidae, the follicle mites. 
Hexapoda, or true insects. 
Siphunculata, or sucking lice. 
Hemiptera. 
