Hetaerina caja dominula Selys, 1853

Material (3 ♂ 1 ♀). - 1 ♂, Rio Mavaca, S of Base Camp; 1 ♂, 1 ♀, Siapa 2 .

Remarks.- As usual, this species was found along broader water courses. While moderately common along a 10 m broad river in the forest, it was exceedingly numerous on the Mavaca and. Siapa rivers, wich might be up to 50 m wide. H. c. dominula was absent from smaller creeks in the forest where it was replaced by the following two species.