狼蛛科（学名Lycosidae）是蜘蛛目的一科。

因经常从后追上猎物，通称狼蛛。能跳、有毒性、行动敏捷、性凶猛、善跑但不能在玻璃等光滑竖立面上爬。其行走攀登能力及视力都次于蝇虎科(跳蛛)。本科生卵后，将卵袋携带在丝囊(纺器)下，卵孵化后小蜘蛛都爬到母蛛腹部上，承坐几天才能过独力的生活。

狼蛛眼睛排成三列(见图一)。其第二列单眼显著(见图二)。

全身;1. 卵袋，2. 螯肢，3. 触肢

一只正保护其卵的狼蛛

狼蛛及其巢穴

雌性狼蛛及其卵

Arctosa sp.

Wolf spiders are members of the family Lycosidae, from the Ancient Greek word "λύκος" meaning "wolf". They are robust and agile hunters with excellent eyesight. They live mostly solitary and hunt alone. Some are opportunistic hunters pouncing upon prey as they find it or even chasing it over short distances. Some will wait for passing prey in or near the mouth of a burrow.