- Echidnophaga gallinacea
- Left spiracle of nymph of Argas persicus
- Cordylobia anthropophaga
- Ixodes ricinus; male, ventral aspect
- The cattle tick (Boophilus annulatus). (a) Female; (b) male
- Culex sollicitans. Female
- Some early medical entomology
- Pediculoides ventricosus, female
- Eggs of Anopheles
- Conorhinus abdominalis
- A solpugid (Eremobates cinerea)
The Solpugida have long borne a bad reputation and, regarding virulence, have been classed with the scorpions. Among the effects of their bites have been described painful swelling, gangrene, loss of speech, cramps, delirium, unconsciousness and even death. Opposed to the numerous loose accounts of poisoning, there are a number of careful records by physicians and zoölogists which indicate clearly that the effects are local and though they may be severe, they show not the slightest symptom of direct poisoning. - Conorhinus sanguisugus
- Demodex folliculorum
- Notœdres cati, male and female
- Larva of Anopheles
- Head of a spider showing poison gland (c) and its relation to the chelicera (a)
- Epithelium underlying poison hairs of the larva of the browntail moth (larger scale)
- The Italian tarantula
- Dancing Mania
- Linguatula. (a) larva; (enlarged). (b) adult; (natural size)
- Larva of Simulium
- Sting of a honey bee
- Chrysomyia macellaria
- Life cycle of the malarial parasite
- Dog flea
- Sarcoptes scabiei, female
- Lucilia cæsar
- Cross section of the larva of the browntail moth showing the tubercles bearing the poison hairs
- Larva of Fannia scalaris
- Two common centipedes
- Otiobius (Ornithodoros) megnini, male. (a) dorsal, (b) ventral aspect
- Reduvius (Opsicœtus) personatus
- Sarcoptes scabiei, male
- Dipylidium caninum. Rostrum evaginated and invaginated
- Sepsis violacea; puparium and adult
Sepsis violacea; puparium and adult - Section through a venom gland of Latrodectus 13-guttatus showing the peritoneal, muscular and epithelial layers
- Left hand stigmata of the larvæ of muscoidea
- Calliphora erythrocephala
- Harvest mites. (Larvæ of Trombidium)
- Poison apparatus of a honey bee
- The yellow fever mosquito (Aëdes calopus)
- Epithelium underlying poison hairs of the larva of the browntail moth
- Mandible of Scolopendra cingulata showing venom gland
- Rasahus biguttatus
- Dipylidium caninum. The double pored tapeworm of the dog
- Culicoides guttipennis - (a) adult, (×15) (b) head of same (c) larva (d) head (e) pupa
- Salivary glands of Notonecta maculata
- Muscina stabulan
- Pediculus showing the blind sac (b) containing the mouth parts (a) beneath the alimentary canal (p)
- Dermanyssus gallinæ, female
- Xenopsylla cheopis, male
- Sarcoptes scabiei. Diagrammatic representation of the course in the skin of man
- Head and pronotum of (a) dog flea; (b) of cat flea; (c) of hen flea (d) Nycteridiphilus (Ischnopsyllus) hexactenus
- Piophila casei
- Otiobius (Ornithodoros) megnini, head of nymph
- Beak of hemipteron
Several families of the true bugs include forms which, while normally inoffensive, are capable of inflicting painful wounds on man. In these, as in all of the Hemiptera, the mouth-parts are modified to form an organ for piercing and sucking. The upper lip, or labrum, is much reduced and immovable, the lower lip, or labium, is elongated to form a jointed sheath, within which the lance-like mandibles and maxillæ are enclosed. The mandibles are more or less deeply serrated, depending on the species concerned. - A millipede
The Diplopoda, or millipedes, are characterized by the presence of two pairs of legs to a segment. The largest of our local myriapods belong to this group. They live in moist places, feeding primarily on decaying vegetable matter, though a few species occasionally attack growing plants. The millipedes are inoffensive and harmless. Julus terrestris, and related species, when irritated pour out over the entire body a yellowish secretion which escapes from cutaneous glands. It is volatile, with a pungent odor, and Phisalix (1900) has shown that it is an active poison when injected into the blood of experimental animals. This, however, does not entitle them to be considered as poisonous arthropods, in the sense of this chapter, any more than the toad can be considered poisonous to man because it secretes a venom from its cutaneous glands. - Mosquito
Anopheles crucians. Female - Mosquito
Anopheles punctipennis. Female - Aëdes calopus; larva
The yellow fever mosquito breeds in cisterns, water barrels, pitchers and in the various water receptacles about the house. In our own Southern States it very commonly breeds in the above-ground cisterns which are in general use. Often the larvæ are found in flower vases, or even in the little cups of water which are placed under the legs of tables to prevent their being overrun by ants. They have been repeatedly found breeding in the holy water font in churches. In short, they breed in any collection of water in close proximity to the dwellings or gathering places of man.