Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Information, insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa


Species Trachelas tranquillus

Trachelas - Trachelas tranquillus - female Trachelas tranquillus - female Female Trachelas tranquillus? - Trachelas tranquillus - female Spider on shed - Trachelas tranquillus Trachelas tranquillus? - Trachelas tranquillus Bullheaded Sac Spider (Trachelas tranquillus) - female?  - Trachelas tranquillus spider - Trachelas tranquillus - male on my chair - Trachelas tranquillus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Araneomorphae (True Spiders)
No Taxon (Entelegynae)
Family Trachelidae
Genus Trachelas
Species tranquillus (Trachelas tranquillus)
Other Common Names
Broad-Faced Sac Spider
Synonyms and other taxonomic changes
Explanation of Names
Latin: "quiet, calm, tranquil"
epigyne, ventral view

epigyne, dorsal view
This spider ranges from New England south to Georgia and Alabama and west to Kansas and Minnesota.
This species prefers warm and dry habitats. It can be found inside rolled leaves, on fences, under stones and boards, and will frequently enter houses by accident in the autumn
Life Cycle
Females will deposit a white egg sac containing about 30 to 50 eggs in September or October.
Will not bite unless handled or provoked.
There are records of secondary infection associated with the bite, which may result from the spider's propensity for feeding on dead arthropods. Typically, the bite results in redness and some swelling, similar to a bee or wasp sting.