Seeversiella castanea Gusarov, sp. n.

6. Seeversiella castanea Gusarov, sp. n. (Figs. 90­104)

Type material. Holotype,, MEXICO: Chiapas: 2.8 km NW Las Piedrecitas, 5 km NW San Cristobal de las Casas, 2400 m, oak and pine forest litter (R.Anderson), 20.ix.1991 (KSEM).

DS – distal sclerite of internal sac.

Paratypes: MEXICO: Chiapas: 10 specimens, same data as the holotype; 6 specimens, Yerbabuena Reserve, 2.1 km NW Pueblo Nuevo Solistahuacan, 2070 m, liquidambar forest litter (R.Anderson), 23.ix.1992; 6 specimens, 8.9 km E Rayon, 1500 m, cloud forest litter (R.Anderson), 19.ix.1991; HONDURAS: La Paz: 2, 4, Cord. Montecillos, 18 km NW La Paz, 14°21'N 87°47'W, 2000 m, pine and hardwood forest litter (R.Anderson), 21.viii.1994 (all ­ KSEM).

Diagnosis. Seeversiella castanea can be distinguished from other species of Seeversiella by having brown body; temples 1.5­1.7 times as long as eyes; glossy pronotum with weak isodiametric microsculpture; elytra longer or as long as pronotum; wings fully developed; tergum 8 with four pairs of macrosetae; the distinct shape of aedeagus (Figs. 94­103) and spermatheca (Fig. 104).

Seeversiella castanea can be distinguished from S. globicollis and the other similar species (3, 5, 7­8, 10­12) with long elytra and weak pronotal microsculpture by the combination of the following characters: distal sclerites of internal sac poorly sclerotized, not dentiform or hook­shaped and have strong spicules (Figs. 99, 101); apex of median lobe in lateral view not widened subapically (Figs. 96­97); spermatheca C­shaped with large umbilicus (Fig. 104).

Description. Length 2.3­2.8 mm, pronotal width 0.46­0.50 mm. Body brown to dark brown with lighter pronotum and elytra, legs brown.

In all external character states S. castanea is similar to S. globicollis, but differs in the shape of the aedeagus and spermatheca as described in the diagnosis.

In large males posterior angles of male tergum 3 projecting as spines up to 1 time as long as tergum 3 (measured medially), tergum 7 with medial carina along midline, the carina up to 2/3 as long as tergum length.

Aedeagus as in Figs. 94­103.

Spermatheca as in Fig. 104.

Distribution. Known from Mexico and Honduras (Fig. 387).

Natural History. Seeversiella castanea was collected in forest litter at altitude of 2000­2400 m.