Seeversiella fusca Gusarov, sp. n.

5. Seeversiella fusca Gusarov, sp. n. (Figs. 79­89)

Type material. Holotype,, MEXICO: Guerrero: 71 km NE Atoyac de Alvarez, 1700 m, flight intercept trap (J.S.Ashe), 27.vii.1992 (KSEM).

Paratypes: MEXICO: Guerrero:, 2, same data as the holotype;, ditto but 25.vii.1992, forest litter; Oaxaca: 2,, 38.4 km N Telixtlahuaca, Hwy. 131, 1880 m, forest litter (J.S.Ashe), 19.vii.1992 (all ­ KSEM).

Diagnosis. Seeversiella fusca can be distinguished from other species of Seeversiella by having dark brown body; temples as long as eyes; glossy pronotum with weak microsculpture; elytra longer than pronotum; wings fully developed, tergum 8 with four pairs of macrosetae, the distinct shape of aedeagus (Figs. 83­88) and spermatheca (Fig. 89).

Seeversiella fusca can be distinguished from S. globicollis and the other similar species (3, 6­8, 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 weak spicules (Fig. 87); apex of median lobe in lateral view not widened subapically (Figs. 85­86); spermatheca L­shaped with small umbilicus and slightly curved in the proximal portion (Fig. 89).

DS – distal sclerite of internal sac.

Description. Length 2.3­2.5 mm, pronotal width 0.46­0.50 mm. Body dark brown with lighter elytra, legs brown.

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

In four examined males posterior angles of tergum 3 not projecting at all or projecting as spines up to 1/3 as long as tergum 3 (measured medially), tergum 7 without medial carina or tubercle.

Aedeagus as in Figs. 83­88.

Spermatheca as in Fig. 89.

Distribution. Known from Mexico (Fig. 387).

Natural History. Seeversiella fusca was collected in forest litter and with flight intercept traps at altitude of 1700­1900 m.