used as combining form of L. fuscus dusky, in certain adjs., as fusco-ferruginous, dull rust-colored; fusco-piceous, dull reddish-black; fusco-testaceous, dull reddish-brown.
1847. Hardy, in Proc. Berw. Nat. Club, II. No. 5. 237. Antennæ black, fusco-piceous at the apex. Ibid., 244. Elytra with nearly parallel sides, flat, black, or fusco-testaceous.