The body length of the female is about 3/8 inch and that of the male is about 3/16 inch, but sizes within different geographical populations can vary widely. The brown widow, L. geometricus C. L. Koch, is dark to light brown with a pattern and an orange hourglass. There are more than 25 Latrodectus species world wide. Lifespans for females range from one to three years; males may live about two months. Common Name: Southern black widow spider Scientific Name: Latrodectus mactans Fabricius Order: Araneae Description: The body of the female, consisting of two regions (cephalothorax and abdomen), is typically shiny black with red markings.The red is usually an hourglass-shaped mark on the underside (venter) of the abdomen, but this may be reduced to remnants. The northern black widow, Latrodectus variolus Walckenaer, usually has the hourglass divided, typically with red spots on the dorsum and white lines on the sides.

This species occurs throughout much of the eastern half of the U.S. Join our email newsletter and we'll email you a $10 OFF coupon code!
The western black widow, Latrodectus hesperus Chamberlin & Ivie, usually has the hourglass marking connected or complete with the anterior triangle larger and wider than the posterior triangle. Males generally require fewer molts to mature than females.

The black widow's natural habitat is a shaded, wooded area. The egg sacs are white to tan or gray, pear-shaped to almost globular of tough papery texture, about 1/4 to 1/2-inch in diameter.


Immatures have the abdomen gray with white curved stripes. Even when disturbed in its web it attempts to escape rather than to attack.

1993b. Image Credit: Missouri Department of Conservation, Updated: 6/9/2020; Life Cycle: Adults of both sexes have been found throughout the year in buildings. Description. We can ship straight to your shipping address or your local UPS Customer Center for you to pick up in the morning. Young spiderlings are orange and white, and acquire more black in later developmental stages (instars) until some have little or no red except the hourglass markings. The species in Texas can be separated to some degree by the shape of the red markings on the abdomen and the location. All orders containing live animals require an adult signature so please ensure that someone is at your shipping location to sign for your order. pick-uppath / Getty Images Widow spiders (genus Latrodectus) are found in North America, Africa, and Australia, but the black widow with the hourglass markings (Latrodectus mactans or southern black widow) is only found in the southeastern United States, from Ohio to Texas, and in Hawaii.. Contrary to common belief, the female does not consume the male in most situations, except when held together in cages from which the male cannot escape. Egg sacs are suspended in the web where the female stands guard nearby. There is much variation in body color with southern and western specimens being more strikingly marked than northern and eastern ones. Each egg sacs contain from 25 to 400 or more eggs.


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