Pselaphomorphus motschulskyi Vásquez-Vélez n. sp.

(Fig. 24)

Diagnosis. Pselaphomorphus motschulskyi can be distinguished from P. parki and P. chandleri in the lengths of the antennomeres 7 to 11, which are shorter and rectangular in this species. Additionally, the median lobe of the aedeagus is divided apically into two short arms.

Description. Male. Body length 1.7 mm. Body flattened dorsally, yellowish to light brown, with clear pilosity. Head triangular (length 0.45 mm, width 0.3 mm), base of antennal tubercle short, not longer than diameter of eye. Head longitudinal sulcus wider in front of eyes. Eyes kidney-shaped (diameter 0.15 mm). Antennal length 1.0 mm.

Antennomere length as follows: 1 and 2 (0.06 mm), 3 to 5 (0.04 mm), 6 (0.03 mm), 7 to 10 (0.06 mm), and 11 (0.12 mm), clava conspicuous. Maxillary palpi yellowish, with short and even pilosity. Pronotum transverse (length 0.35 mm, width 0.4 mm), lateral lobes triangular, basal angle round. Pronotal disc square, longitudinal and transverse sulci with same width throughly. Elytra length 0.6 mm, width 0.8 mm. Humeral teeth and elevation absent. Sutural fovea transversely elongate, basal discal fovea round, basal ridge weak. Sutural stria present. Abdominal segments I–V dorsally with length as follows: 0.2, 0.06, 0.06, 0.1, 0.06 (mm). Ventrally, segment V distally round, segment VI round depressed, pygidial suture present. Genitalia. Phallobase regular, globose, bilobed and symmetrical. Median lobe short, apically divided into two short arms. Accessory lobes absent (Figs. 24 B, 24C).

Type material. Holotype (male): “ Costa Rica, Santo Domingo de Heredia, INBio Cafetal, 1100 m. VI-25/28 - 1997. S & J. Peck. CR1P97 0 27, flight intercept trap” (KSEM); Paratypes (2): Costa Rica: 1 male (cleared and dissected), same information as holotype (KSEM); 1 male, Heredia 16 km SSE La Virgen, Braulio Carrillo National Park, 1050–1150 m, 10°16’N, 84°05’W, IV-12-2001 INBio-OET-ALAS transect (UNHC).

Etymology. Patronymic; named after Russian entomologist Victor Motschulsky, who described the genus Pselaphomorphus and its first species P. sculpturatus .