Crostis caperata Prena & Anderson new species

Diagnosis. Total length 2.3–2.6 mm; body form oblong-ovate, L/W elytra 1.25–1.31 (Figs. 9–10). Characteristic for this species of Crostis are (i) transverse pronotum with disc with very fine erect hairs (especially visible in lateral view), longitudinally striate or with striae broken into elongate punctures, flanks glossy, impunctate (Figs. 15–16), (ii) length of first funicular article slightly shorter than combined lengths of articles 2–4, (iii) punctures of ventrites I and II small, shallow, large areas of ventrites almost impunctate, glossy, and (iv) penis with apex truncate, slightly expanded laterally towards midlength, endophallus distally with elongate, slender, basally sinuate endophallite with pair of flexible, dorsal prongs in basal third, apodemes ca. 2.6× longer than length of penis body (Fig. 22).

Etymology. The name is a Latin adjective meaning wrinkled.

Natural history. All known specimens have been sifted from leaf litter in hardwood forests from 2300–2650 m elevation.

Material examined. Holotype male, MEXICO. Chiapas, Municipio San Cristobal de las Casas, Cerro Huitepec, ca. 5 km W. San Cristobal, 2650m, 17 Sep 1991, R. Anderson, wet oak forest litter, 91-106 (CMNC) . Paratypes (4 males, 2 females): same data as holotype (1 male, 1 female, CMNC). Reserva Huitepec, 2300m, 16.759, -92.681, 15 Jul 2005, R. Anderson, mixed oak forest litter 2005-001B (1 female, CMNC). Reserva Huitepec, 27-vi-95, B. Gómez, M. Girón, HR-41-8 (1 male, JPPC). Reserva Huitepec, 22-xi-95, A. Mendoza, M. Girón, HR-58-2 (1 male, JPPC). Municipio Huixtan, Guadalupe Shanikala, 2350m, 16°38’N, 92°25’W, 25 Jul 2005, R. Anderson, mixed hardwood (no oaks) forest litter, 2005-007B (1 male, CMNC) .