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The New International Encyclopædia/Blattidæ

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Edition of 1905. See also Blattidae on Wikipedia; and the disclaimer.

BLAT′TIDÆ (Lat. blatta, cockroach, moth). A family of cursorial Orthoptera, including the ordinary cockroach. The Blattidæ are the oldest known insects, being found as fossils in the Middle Silurian of France. See Cockroach.