Castolus rufomarginatus Champion, 1899

(Figs. 9E, 10C)

Remarks. We only found two specimens in the collections examined. This species is easily recognized due to its dark overall coloration with a bright red band on the posterior and lateral margins of the posterior pronotal lobe. Males have more protruding eyes than females.

Distribution. This species was described from Mexico and Guatemala (Champion 1899), with additional records from Venezuela (Maldonado 1976). It represents new country records from Costa Rica, Colombia, and Ecuador, although only iNaturalist observations were available from Costa Rica and Ecuador (Fig. 10C).

Material examined. COLOMBIA — Tolima • 1♀; Cunday, [vereda] El Edén; 550m; [04.02292°N, 74.72698°W]; 8 Oct 1999; P. Ruiz, leg.; colecta manual nocturna; MPUJ _ ENT0068463 (MPUJ _ ENT) — Valle del Cauca • 1 ♀; Tuluá, vereda Mateguadua, Jardín Botánico Juan María Céspedes; [04.02323°N, 76.16076°W]; 1100m; en rastrojo; G. González, leg.; MPUJ _ ENT0068464 (MPUJ _ ENT) .

OTHER EXAMINED MATERIAL (iNaturalist observations): COLOMBIA — Antioquia • 1♀; Girardota; 06.37027°N, 75.4677°W; 4 Abr 2021; D. Foster leg.; https://www.inaturalist.org/observations/72960413 • 1♀; same data; https://www.inaturalist.org/observations/74003063 — Cundinamarca • 1♀; Nocaima; 05.0695°N, 74.3803°W; 14 Sep 2020; O. Enciso leg.; https://www.inaturalist.org/observations/59652248 — Santander • 1♀; El Carmen de Chucurí; 06.6266°N, 73.5954°W; 22Mar 2019; J. D. Quioga leg.; https://www.inaturalist.org/observations/22414438 • 1♀; La Parcela, Piedecuesta; 07.0286°N, 73.0631°W; 30 Mar 2021; A. Olmos leg.; https://www.inaturalist.org/observations/72491462 . COSTA RICA — Cartago • 1♂; [near El Copal, biological reserve]; 09.7842°N, 83.7515°W; 6 Mar 2019; G. Kunz leg; https://www.inaturalist.org/observations/22405008 • 1♂; same data; 4 Mar 2019; https:// www.inaturalist.org/observations/31975581 . ECUADOR — Pastaza • 1♀; Puyo; 01.4845°S, 78.0060°W; 12 Sep 2020; Valeria leg.; https://www.inaturalist.org/observations/59440988 — Napo • 1♀; Tena; 00.9962°S, 77.8136°W; 12 Sep 2018; D. Schulten leg.; https://www.inaturalist.org/observations/63967097 .