- Cærostris Mitralis
- Cærostris Mitralis, in profile
- Dancing Mania
- Demodex folliculorum
- Dermanyssus gallinæ, female
- Dermatophilus penetrans
- Diagram of a longitudinal section of a mosquito
- Dipylidium caninum. Rostrum evaginated and invaginated
- Dipylidium caninum. The double pored tapeworm of the dog
- Dog flea
- Dome-like House of Cicada
- Dorcus punctulatus
- Drassidæ
- Dryocora howittii
- Dryocora howittii - Larva
- Dysderidæ
- Echidnophaga gallinacea
- Egg-capsule of P. orientalis
- Eggs of Anopheles
- Epithelium underlying poison hairs of the larva of the browntail moth
- Epithelium underlying poison hairs of the larva of the browntail moth (larger scale)
- Evania appendigaster
- Every good mother should be the honored queen of a happy family
- Field Scorpion
- Fight between an Ordinary Roller Spider and a Scorpion
- Filaria in the muscles and labium of Culex
- Flea
- Flea
- Flowers
- Foot of Attus Mystaceus
- Foot of Epeira Vulgaris
- Freshly hatched larva of Julus multistriatus
- Garden spider
- Gecko, chasing cockroaches
- Harlequin Spider
- Harvest mites. (Larvæ of Trombidium)
- Head and pronotum of (a) dog flea; (b) of cat flea; (c) of hen flea (d) Nycteridiphilus (Ischnopsyllus) hexactenus
- Head of a spider showing poison gland (c) and its relation to the chelicera (a)
- House spider
- House-builder Moth
- Insect frame
- Insect Frame 2
- Insect Frame 3
- Insect Frame 4
- Ixodes ricinus; male, ventral aspect
- Larva of a flesh fly (Sarcophaga) - Caudal aspect - Anterior stigmata. Pharyngeal skeleton
- Larva of Anopheles
- Larva of Auchmeromyia luteola
- Larva of Fannia scalaris
- Larva of Forficula
- Larva of Pulex irritans
- Larva of Simulium
- Larva of Xenopsylla cheopis
- Leaf-Cutter Bee at Work
- Left hand stigmata of the larvæ of muscoidea
- Left spiracle of nymph of Argas persicus
- Lepismas at Work
- Life cycle of the malarial parasite
- Linguatula. (a) larva; (enlarged). (b) adult; (natural size)
- Locust