Gabrius ingratus FAUVEL 1905

Hromádka, L., 2011, Revision of the genus Gabrius STEPHENS 1829 from Madagascar and adjoining Islands (Coleoptera: Staphylinidae: Philonthina), Linzer biologische Beiträge 43 (2), pp. 1377-1397 : 1384-1385

Gabrius ingratus FAUVEL 1905 (Figs 20-22)

T y p e m a t e r i a l e x a m i n e d

A d d i t i o n a l m a t e r i a l e x a m i n e d: MADAGASCAR, Tamatave prov., Andasibe (Maromizaha) , 21.-24.ii.1995, (near type locality), Ivo Jeniš (cHPC).

R e d e s c r i p t i o n: Body length 7.2 mm, length of fore body (to end of elytra) 3.5 mm. Head and elytra black, pronotum, abdomen, maxillary and labial palpi black-brown, mandibles brown-yellow, antennae black, femora yellow-brown, tibiae and tarsi blackbrown.

Head wider than long (ratio 28: 24), distinctly narrowed posteriorly, posterior angles markedly rounded. Clypeus with shallow depression medially. Between eyes 4 coarse punctures, distance between medial punctures four times as large as distance between medial and lateral puncture. Medial punctures slightly shifted anteriorly. Eyes slightly convex, shorter than temples (ratio 8: 11.5). Posterior margin with several coarse punctures, temporal area almost impunctate. Surface with very fine irregular microsculpture.

Antennae long, slightly widened distally, reaching posterior fifth of pronotum when reclined. Antennomeres 1-3 and 11 longer than wide, remaining antennomeres as long as wide.

Pronotum longer than wide (ratio 27: 23), parallel-sided, anterior angles obtusely rounded, posterior angles markedly rounded. Each dorsal row with 6 coarse punctures, punctures 2-6 equidistant, distance between punctures 1 and 2 slightly larger than distance between previous punctures, each sublateral row with 2 punctures, puncture 2 shifted to the lateral margin. Surface with very fine microsculpture, consisting of transverse waves.

Scutellum finely and relatively sparsely punctate, diameter of punctures slightly larger than eye-facets, separated by 1 puncture diameter in transverse direction.

Elytra as long as wide, slightly widened posteriorly. Punctation coarse and dense, diameter of punctures much larger than that on scutellum, separated mostly smaller than one puncture diameter. Surface lacks microsculpture; setation indistinct.

Legs. Metatibia longer than metatarsus (ratio 20: 17), metatarsomere 1 shorter than metatarsomere 5.

Abdomen parallel-sided, punctation at base of all tergites finer than that on elytra, be-

coming sparser towards posterior margin of each tergite. Surface lacks microsculpture; setation indistinct.

C o m p a r a t i v e n o t e s G. ingratus is similar to G. fauveli , but may be distinguished from the latter by the stronger antennae, darker antennomeres 1-2, denser and little extesiver punctation of scutellum, denser punctation of elytra, from G. quadriceps by the darker antennomeres 1-3, wider head, longer eyes and from the both latter by the different shape of the aedeagus.

D i s t r i b u t i o n: Madagascar ( HERMAN 2001).