These organisms are beneficial to our environment, but they can bite or sting.  For that reason, humans may consider this list of critters to be pests.  The common name is listed first.  The Order is parenthesized.

• Ants, bees and wasps (Hymenoptera)
  • Ants
    • Fire ants
    • Other ant species
  • Bees
    • Bumblebees
    • Honey bees and Africanized or “Killer” honey bees
  • Wasps (cicada killers and digger wasps, velvet ants and cow killers, paper wasps, hornets)
    • Velvetants (velvet ants, cow killers)
• Caterpillars and asps (Lepidoptera)
• Centipedes and millipedes  (Non-insect arthropods, Class Chilopoda and Diplopoda respectively)
• Conenose (kissing) bugs (Hemiptera)
  • Kissing Bugs and Chagas Disease
• Fleas (Siphonaptera)
  • Safer flea control
• Flies (Diptera)
  • Black flies
    • 2012 Outbreak in Central Texas
  • Horse and deer flies
    • Horse flies and deer flies of West Virginia (large PDF)
  • Mosquitoes – Mosquitoes are flies with sucking mouthparts.  All other flies have rasping or biting mouthparts.
    • Choosing and Using Insect Repellents |  (Spanish)
    • Mosquito Control Around the Home
    • Mosquitoes of Texas
    • Mosquitoes of Texas by County
    • Public Health, Vector and Mosquito Control
    • West Nile Virus – CDC
    • West Nile Virus – State of Texas
  • Stable flies
• Mites and ticks (Non-insect arthropods, Order Acari)
  • Chiggers
  • Common Insect and Mite Pests of Humans
  • Ticks
    • It’s Tick Time in Texas Again
    • Tick Testing
    • TickApp (phone)
    • Tick Control (Publication E-150)
• Mosquitoes
• Scorpions (Non-insect arthropods, Order Scorpionida)
• Spiders (Non-insect arthropods, Order Araneae)
  • Spiders of Texas
  • Recluse and Widow Spiders
  • Venomous Terrestrial Animals of Texas