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Holotype: FMNH 30956
Type-locality: Courantyne District [Guyana], near Brazilian border, at Lat. 1〫 40' N. and Long. 58〫 W. The type locality was further defined in the original description as the Boundary Commission's 'Boundary Camp,' at about 2000 feet above sea level, at the head of Itabu Creek. This creek enters the New River, an affluent of the Courantyne, at New River Depot. Collected by Emmett R. Blake on September 22, 1938.