Numbers
9 spp. US, 3 spp in Canada; 12 spp. total
(1)(2)Identification
Superficially resembles nymphs of Gerris. First antennomere shorter than three others combined.
Range
e., w., & so. NA; c. & so. America
(3)(2)Remarks
Adults are typically found in wingless forms and coloration can be highly variable within species.