Fleas

Insecta Inspecta World - The Common Cat Flea - Taxonomy, anatomy, jumping skills, reproduction, and control of the cat flea.
http://www.insecta-inspecta.com/fleas/cat/index.html

Ctenocephalides felis - Several photographs of the cat flea, its larvae and pupae. Click to enlarge.
http://www.icb.usp.br/~marcelcp/Ctenocephalidesfelis.htm

Fleas - Ohio State University Extension fact sheet about fleas, including a species list and information about life cycle and control.
http://ohioline.osu.edu/hyg-fact/2000/2081.html

Introduction to the Siphonaptera - A brief introduction to fleas by UCMP Berkeley, with photograph.
http://www.ucmp.berkeley.edu/arthropoda/uniramia/siphonaptera.html

Ctenocephalides canis - Photographs of the dog flea. Click to enlarge.
http://www.icb.usp.br/~marcelcp/Ctenocephalidescanis.htm

Fleas (Siphonaptera) - Zoological Institute of Russian Academy of Sciences (St.Petersburg, Russia) presents information on morphology, biology, distribution and importance of fleas (Class Insecta: Order Siphonaptera).
http://www.zin.ru/Animalia/Siphonaptera

Ctenocephalides felis: Cat Fleas - Research project by Hoi King Kwong on these parasites including their classification, morphology, habitat, reproduction, adaptations, nutrition and interactions with other species.
http://bioweb.uwlax.edu/bio203/s2008/kwong_hoi/

Xenopsylla brasiliensis - Photograph of this flea. Click to enlarge.
http://www.icb.usp.br/~marcelcp/Xenopsyllabrasiliensis.htm

Ctenocephalides felis and Pulex irritans: Cat Flea and Human Flea - Photograph of a flea, with information on its hosts, life cycle and description.
http://www.ento.okstate.edu/ddd/insects/fleas.htm

Pulex irritans - Photograph of the human flea with its identifying features. Click to enlarge.
http://www.icb.usp.br/~marcelcp/pulex.htm

Flea Circus Research Library - Flea Circuses and performing fleas in history, film and fiction. Including a directory of real and "humbug" flea circus performers.
http://www.fleacircus.co.uk

Ctenocephalides felis: Cat Flea - Photographs and a description of this flea, its distribution, life cycle, medical and economic significance and management.
http://creatures.ifas.ufl.edu/urban/occas/catflea.htm

Insect Insights: Flea Circus - Photographic study by Dave Walker of these insects.
http://www.microscopy-uk.org.uk/mag/artjun98/insecin2.html

Fleas - Article by P.G. Koehler about flea biology with photographs, and tables relating to their control.
http://edis.ifas.ufl.edu/scripts/htmlgen.exe?DOCUMENT_IG087

Tunga penetrans - Photograph of the sand flea or chigger, with its identifying features. Click to enlarge.
http://www.icb.usp.br/~marcelcp/Tungapenetrans.htm

Flea News - A biannual newsletter devoted to mostly bibliographic information about fleas.
http://www.ent.iastate.edu/FleaNews/aboutfleanews.html

The Black Death: Culprit: The Oriental Rat Flea - About the flea and the disease.
http://www.insecta-inspecta.com/fleas/bdeath/index.html

Integrated Flea Control - University of Nebraska Cooperative Extension in Lancaster County factsheet and audio on flea biology and control.
http://lancaster.unl.edu/enviro/pest/factsheets/007-98.htm

Fleas - This article describes these pests, their biology, importance and control measures.
http://edis.ifas.ufl.edu/IG087

Fleas: What they Are and What to Do - Photographs and a description of fleas, their identification, life cycle, biology, problems associated with them, and all aspects of flea control.
http://edis.ifas.ufl.edu/IG132

Siphonaptera: Fleas - The characteristics of these wingless insects, their life cycle, feeding and habitat, with illustrations.
http://www.ento.csiro.au/education/insects/siphonaptera.html

Ctenocephalides: Cat and Dog Fleas - Exercise from Invertebrate Anatomy OnLine covering the systematics, external anatomy and life cycle of these wingless insects.
http://webs.lander.edu/rsfox/invertebrates/ctenocephalides.html