Abstract
The North American species were discussed by Fall (1923), under the nameAgaporusZimmermann (1919: 192) . However, as has been pointed out by Giugnot and F. Balfour-Browne,Agaporus, withHydroporus oblongusStephens as its type, is a synonym ofLaccornisDes Gozis (1914: 111). Des Gozis proposedLaccornisas a subgenus ofHydroporus, withH. oblongusas the type and only species mentioned.

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