Argia insipida Hagen in Selys, 1865

Material. 1♂, 1♀ (in tandem), Siapa 2 .

Remarks. Numerous tandems were observed. all flying upstream. A few single males settled on a floating log. The populations south of the Orinoco differ from the northern form in having much broader black (brown in female) humeral stripes. These are about half as broad as the meseprimeron. The pale markings between the post· ocular spots are also much reduced or entirely wanting in the southern form.