Three new mymarid egg parasitoids of the carrot weevil, Listronotus oregonensis (LeConte) (Coleoptera: Curculionidae), are described: Anaphes cotei Huber from Nova Scotia; Anaphes listronoti Huber from Quebec; and Anaphes victus Huber from Quebec, Michigan, and Texas. A key to the species is given. Anaphes sorditatus (Girault), with which at least one of the new species was previously confused, is redescribed. Although listronoti and sorditatus cannot presently be distinguished morphologically, they are biologically distinct and have different hosts. Crosses between male sordidatus and female victus yielded female offspring in 27% of the tests but none in the reciprocal crosses. The corresponding control crosses resulted in 90 and 30% female offspring. Mating did not occur in attempts to cross sordidatus with listronoti. On three occasions an unidentified species of Anagrus was reared from field-collected carrot weevil eggs. This represents the first report of an Anagrus species from Curculionidae.