Atlanticus (Atlanticus) testaceus (Scudder, 1901)
 
female pronotum (outline of disc)

Source: Rehn, J.A.G. & Hebard. 1916. Trans. Amer. Entomol. Soc. 42:33-100, Pl. VI-VIII, Pl. VI, Fig. 3 (specimen from Pennsylvania)