A REVISION OF THE ISMARINAE OF THE NEW WORLD (HYMENOPTERA, PROCTOTRUPOIDEA, DIAPRIIDAE)

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Abstract
The genus Ismarus Haliday of the New World is revised. Twenty-one species are recognized, described, and keyed, of which the following 16 are new: I. brevicornis n. sp. ♂ (Mexico), I. clarkae n. sp. ♀ (Canada), I. dux n. sp. ♂ (Panama, Costa Rica), I. flavicrus n. sp. ♀ (Mexico), I. flavigena n. sp. ♂ (Canada, U.S.A.), I. gibsoni n. sp. ♀ (Canada, U.S.A.), I. gracilis n. sp. ♀ ♂ (Mexico, Panama), I. helavai n. sp. ♀ (Panama), I. masoni n. sp. ♀ ♂ (Mexico), I. mexicanus n. sp. ♀ ♂ (Mexico), I. neotropicus n. sp. ♀ ♂ (Brazil), I. porteri n. sp. ♂ (Argentina), I. orion n. sp. ♀ (Mexico), I. rex n. sp. ♀ ♂ (Mexico), I. varicornis n. sp. ♀ (Brazil), and I. vigil n. sp. ♂ (U.S.A.). The hitherto unknown males of I. americanus Fouts and I. nevadensis Kieff. are described. I. rugulosus Foerst., I. halidayi Foerst., and I. flavicornis (Thorns.), previously known from Europe, are recorded from Canada and the U.S.A. Higher classification, interrelationships, and world distribution of Ismarus are discussed.