- Normal position of the larvæ of Culex and Anopheles in the water
- A flesh fly
- A millipede
- A true scorpion
- A whip-scorpion
- Aëdes calopus; larva
- An American tarantula
- Anopheles quadrimaculatus mosquito
- Argus persicus. Capitulum of male
- Auchmeromyia luteola
- Beak of hemipteron
- Diagram of a longitudinal section of a mosquito
- Mosquito
- Mosquito
- Simulium venustum