N. hirsutus is similar to N. tucumanensis in size, body shape and color pattern. It mainly differentiates because the eyes are strongly convex; the vestiture is composed of piliform scales and very long erect setae, on elytra, pronotum and legs; and the color pattern usually includes a V-shaped white stripe on the anterior half of the elytra, extended from humeri to 3º interval and interrupted at interval 4º, and a macula on the posterior half of intervals 6º to 8º. The pronotum has five slender white stripes (along midline, sides and margins) and the scutellum is white as in N. tucumanensis. Corbels of the hind tibiae are very narrow.
Prosopis kutzei Harms Kuntze, Prosopis nigra (Grisebach) Hieron, Prosopis ruscifolia Griseb., Medicago sativa L. (Fabaceae), and Schinopsis lorentzii (Griseb.) Engl. (Anarcadiaceae) (Lanteri et al. 2002a).
Mainly associated with vegetation native to the biogeographic province of Yungas.