Oxyscelio sinuum Burks sp. n. Figures 395-398Morphbank105

Description.

Female. Body length 4.1-4.65 mm (n=4).

Radicle color: same color as scape. Scape color: Brown. A4: longer than broad. A5: broader than long. Antennal club: formed, segments compact.

Interantennal process: not elongate. Median longitudinal elevation in frontal depression: absent. Frontal depression: concave. Frontal depression sculpture: with 3 or more broadly interrupted transverse carinae. Submedian carina: strong, formed by a sharp raised carina. Submedian carina medially: with sharp peak. Concavity across dorsal part of frontal depression: absent. Depression extending ventrally from median ocellus: absent. Upper frons: not hood-like. Malar area near antennal foramen: without carina or expansion. Malar area at mouth corner: with radiating striae. Smooth strip along posterior side of malar sulcus: absent or not consistently broad. Middle genal carina: present. Direction of middle genal carina dorsally: parallel to eye margin. Major sculpture of gena anteriorly: umbilicate-foveate; rugose. Major sculpture of gena posteriorly: umbilicate-foveate; rugose. Microsculpture of gena anteroventrally: absent. Microsculpture of gena posteroventrally: absent. Median carina extending posteriorly from hyperoccipital carina: absent. Hyperoccipital carina: indicated by rugae. Lateral connection between hyperoccipital and occipital carinae: present as a weak elevation. Area between vertex and occipital carina: umbilicate-foveate. Occipital carina medially: divided into concave halves, meeting at median peak. Lateral corners of occipital carina: sharp and protruding.

Lateral pronotal area: without bulge projecting towards anterior pit. Epomial corner: strong. Netrion surface anteriorly: not inflexed. Mesoscutum anteriorly: not steep. Mesoscutal median carina: present and complete. Longitudinal carina between median carina and notauli: absent. Major sculpture of medial mesoscutum anteriorly: umbilicate-foveate. Major sculpture of medial mesoscutum posteriorly: umbilicate-foveate. Microsculpture of medial mesoscutum anteriorly: absent. Microsculpture of medial mesoscutum posteriorly: absent. Major sculpture of mesoscutellum: umbilicate-foveate; longitudinally rugose. Microsculpture of mesoscutellum medially: absent. Microsculpture of mesoscutellum laterally: absent. Mesoscutellar apex: convex or straight. Setae along anterior limit of femoral depression: arising from rows of foveae. Number of carinae crossing speculum above femoral depression: 3. Number of carinae crossing femoral depression: 3-5. Mesepimeral sulcus pits: 3-5. Metascutellum dorsally: flat. Metascutellar sculpture dorsally: with scattered rugae. Median carina of metascutellum: absent or branched. Metascutellar setae: absent. Metascutellar apex: convex or straight; weakly emarginate. Metapleuron above ventral metapleural area: crossed by carinae. Metasomal depression setae: absent. Lateral propodeal carinae anteromedially: strongly diverging. Anterior areoles of metasomal depression: absent. Anterior longitudinal carinae in metasomal depression: absent. Lateral propodeal areas: separated medially. Postmarginal vein: present. Fore wing apex: reaching apex of T4.

T1 midlobe: obscured by other raised sculpture. T1: with long anterior bulge, reaching metascutellum. T2: with straight longitudinal striae or rugae. T6: longer than broad . Apical flange of T6: not exposed apically. Metasomal apex: rounded. Major sculpture of T6: umbilicate-punctate. Microsculpture of T6: granulate.

Male. Unknown.

Diagnosis.

Female: Occipital carina complete as a distinct carina, but medial portions concave and meeting at a rounded peak. Mesoscutellum with many narrow longitudinal rugae. Netrion not concave. Metascutellum broad and subrectangular, not concave . Fore wings long enough to reach apex of T4. T1 midlobe with anterior horn. T6 longer than broad and tapering to a narrow but rounded apex.

Etymology.

Latin noun, 4th declension, genitive case, referring to the medially sinuate occipital carina.

Link to distribution map.

[http://hol.osu.edu/map-full.html?id=275539]

Material examined.

Holotype, female: THAILAND: Nakhon Si Thammarat Prov., TV aerial, T3103, Namtok Yong National Park, 08°14.262'N, 99°48.289'E, 966m, 18. VIII– 25.VIII.2008, malaise trap, Paiboon, OSUC 352506 (deposited in QSBG). Paratypes: (3 females) SINGAPORE: 1 female, OSUC 376755 (MCZC). THAILAND: 2 females, OSUC 352505 (OSUC); OSUC 361953 (QSBG).

Comments.

Oxyscelio sinuum resembles some other species with a complete, sinuate occipital carina. It differs in a combination of characters, including the flat, rugose metascutellum.