Mesa silvana, Boni, 2013

Boni, M., 2013, Afrotropical taxa of the genus Mesa SAUSSURE 1892 (Hymenoptera, Tiphiidae, Myzininae), Linzer biologische Beiträge 45 (2), pp. 1657-1744 : 1698-1699

Mesa silvana nov.sp.

H o l o t y p u s: Kenya = /Kenya Arabuko Sokoke forest (30 km S di MALINDI) 8-24.VI.1998 alla luce L. Bartolozzi & A. Sforzi legit / MZUF.

P a r a t y p e s: (2) Kenya = / Kenya Arabuko Sokoke forest (30 km S di Malindi) 8- 24.VI.1998 alla luce L. Bartolozzi & A. Sforzi legit /, MZUF; (1) Zimbabwe = /W-Zimbabwe 60 km N Bulawayo Maraposa Rd XII.1998 leg M. Snižek /, OLML .

Male: (Holotype): figs 249-255 . Body size: 10 mm.

Black. Ventral side of flagellum dark yellow. Pale yellow are: mandible; the whole of clypeus but the semitransparent ventral edge; subapical Tsa; the anteroventral tooth and subapical stripe on N 1; fore half tegula; the whole of X 1 and X 2, fore and mid trochanter and femur, tibiae (but longitudinal stripe) and tarsi, most of X 3 and hind femurs; apical

stripe on 1 st to 6 th Te; small lateral spots on 3 th and 6 th, narrow apical stripe on 4 th and 5 th Ste. Wings hyaline.

No tyloids on flagellomeri. Fore border of N 1 disk clearly angled without lamellar keel, with a blunt prominence on its anteroventral corner; ratio LApos / Lmed about 2.3 in dorsal aspect. Bipunctate surface of 2nd to 5th terga by sparse shallow larger p among small p. Apical ventral edge of hind femur rounded. Rounded ventral petiolar surface. Apical surface of 1 st Ste without p. 1st metamerus very slender, ratio L / LA of 1 st Ste more than 4. Epipygium with a very shallow median notch, delimited laterally only by a rounded angle.

N o t e. It belongs to a group of taxa with very slender and small males (no more than 11 mm) having strongly angled volsella. Besides genitalia it is distinct by the completely yellow X 1 and X 2. Paratype from Zimbabwe shows more dilated bristles both on volsella and gonosquama.

Derivatio nominis. From Silvanus, ancient latin god of forests.

Figures

Figs 249-255: Mesa silvana: (249) head, frontal aspect; (250) pronotum, dorsal aspect; (251) pronotum, lateral aspect; (252) epipygium, dorsal aspect; (253) gonosquama; (254) volsella; (255) aedeagus; (249-251: scale bar: 1 mm; 252-255: scale bar: 0.5mm).