Arthropods
Insects (3 distinct body parts: head, thorax, and abdomen; head has 2 antennae; thorax has 6 legs; many also have 2 pairs of wings)
Fleas
Flies
Lice
Arachnids (2 body parts: prosoma and opisthosoma; 8 legs; do NOT have wings or antennae)
Ticks
Mites (e.g. scabies)
Insects (3 distinct body parts: head, thorax, and abdomen; head has 2 antennae; thorax has 6 legs; many also have 2 pairs of wings)
Fleas
Flies
Lice
Arachnids (2 body parts: prosoma and opisthosoma; 8 legs; do NOT have wings or antennae)
Ticks
Mites (e.g. scabies)
Fleas
Flies
Lice
Ticks
Mites (e.g. scabies)
Ectoparasites
Bed bugs
Pseudoparasites
Lice
Nematocysts
Scabies 
Tapeworm
Ticks