[39] A. bispinosus ^HNS

is a distinct species of the hylean region that is relatively rare in collections. The MCZ has samples from Guyana: Kaow I. (W. M. Wheeler); Forest Settlement, Rio Mazaruni (N. A. Weber); King Frederick William IV Falls (Weber). Brasil: Belém, Pará (P. Dias). Porto Velho, Rondonia (W. M. Mann). Colombia: Valle Dept., 19 km E Buenaventura (E. I. Schlinger and E. S. Ross). Kempf (1972) lists it also from the Brasilian states or territories of Amazonas and Amapá, and from Bolivia.

Kempfs 1964 species vexator ^HNS (northeastern Mato Grosso) is still known only from the types. The paratype has been reviewed, and my measurements agree well with Kempf’s, except that I make

ML 1.10 mm instead of his 1.07 mm;, the MI is thus 74, while Cl is 79.

A. oriens ^HNS, from Parque Sooretama in northern Espirito Santo State, Brasil, is known only from the holotype. My measurements differ slightly from Kempf’s: HL 1.53, HW 1.18, ML 1.11 mm (Cl 77, MI 73).