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Southern Black Widow
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Northern Black Widow
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Western Black Widow
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| Southern New England to Florida west to eastern Oklahoma,
Texas and Kansas. More common in the southern part of the range. |
New England and adjacent Canada south to Florida, and west to eastern Texas, Oklahoma and Kansas. More common in the northern part of the range. | Western portions of Texas, Oklahoma, and Kansas north to the
adjacent Canadian provinces, west to the Pacific Coast states. |
Anterior Posterior |
Anterior Posterior |
Anterior Posterior |
| Ventral side of the abdomen (underbelly) showing the typical variation in the red hourglass markings. Note that anterior half of the marking is wider and the posterior ends are more generally rounded in their shape. | The hourglass is usually broken down the middle into two parts. |
The hourglass mark is typically complete with both halves triangular
with the anterior triangle longer and broader than the posterior region. |
| Egg sacs nearly spherical with a grayish tinge, even when freshly made. | Egg sacs typically yellow or tan and more pear shaped. | Egg sacs typically creamy yellow to tan, never gray and more pear shaped. |