Key to the males of Falsocis Pic 1 Frontoclypeal ridge with corners obtusely angulate (Fig. 3–4). Anterior pronotal plate completely concealing the head from above (Fig. 1), with anterior margin bearing a row of stout setae similar to those of lateral margins. Pronotal disc (Fig. 1) with dense punctation, punctures separate by a distance of one puncture width or less. Elytral apices explanate and broadly crenulate (Figs 1–3). Epipleura larger at base and tapering to basal third, then expanding again until the apex (Fig. 3). Aedeagus elongate, around four times as long as wide (Fig. 6). TL around 3mm. Amazon Forest (Fig. 24), in French Guiana and northern Brazil ............................................................................................................................. Falsocis opacus Pic - Frontoclypeal ridge with corners produced upwards to form a pair of long curved horns (Figs 8, 10). Head partially visible from above (Fig. 7). Apex of anterior pronotal plate bearing a patch of long setae on either side (Figs 7, 9–11). Pronotal disc with sparse punctation (Fig. 7), punctures separate by a distance of one to three puncture widths. Elytral apices broadly rounded. Epipleura larger at base and tapering to basal third, then continuing as a narrow line (Figs 9, 11, 16). Aedeagus subquadrate, around twice as long as wide (Figs 20, 22). TL 2.00– 2.80mm. Atlantic Forest (Fig. 24): southeastern to the extreme south of northeastern Brazil ......................................................................................... Falsocis brasiliensis sp. nov.

Published as part of Lopes-Andrade, Cristiano, 2007, Notes on Falsocis Pic (Coleoptera: Tenebrionoidea: Ciidae), with the description of an endangered Brazilian species, pp. 41-58 in Zootaxa 1544 on page 44, DOI: 10.5281/zenodo.177945