Labilochus brevipalpis Khalaim & Ruiz-Cancino, 2017

Khalaim, Andrey I., Ruiz-Cancino, Enrique & Coronado-Blanco, Juana Maria, 2017, Labilochus brevipalpis, a new genus and species with extremely long mouthparts (Hymenoptera, Ichneumonidae, Tersilochinae) from Mexico, Journal of Hymenoptera Research 55, pp. 121-127 : 123-125

Labilochus brevipalpis Khalaim & Ruiz-Cancino sp. n.

Figs 1-6

Description.

Female. Body length 4.0 mm. Fore wing length 2.9 mm.

Clypeus smooth, with very fine punctures in upper part. Antennal flagellum with 21 flagellomeres (Fig. 1 ); all flagellomeres (except basal and apical ones) more or less equally elongate, about 1.2-1.3 times as long as broad; flagellomeres 4 to 6 with subapical finger-shaped structures on outer surface. Face, frons and vertex with very fine, inconspicuous, dense punctures on smooth and weakly shining background. Temple polished, impunctate. Mesoscutum very finely punctate on smooth and weakly shining background. Mesopleuron mostly polished and impunctate. Foveate groove postero-ventrally covered by glue and indiscernible. Propodeum weakly shining, impunctate. Fore wing with intercubitus (2 rs-m) somewhat longer than abscissa of cubitus between intercubitus and second recurrent vein (abscissa of M between 2 rs-m and 2 m-cu). First tergite 4.4 times as long as posteriorly broad, smooth (Fig. 6 ). Second tergite twice as long as anteriorly broad (Fig. 6 ).

Head black; clypeus brownish yellow in lower half, mandible brownish yellow with teeth blackish; glossa and palps yellow, remaining mouthparts dark brown or fuscous. Antennal flagellum black, scape and pedicel dark brown. Mesosoma black. Tegula yellowish. Pterostigma brown. Legs predominantly brown; all coxae black; mid and hind tibiae and tarsi fuscous; hind femur apically pale. First tergite black. Metasoma behind first tergite predominantly brownish yellow; tergite 2 in basal 0.2, tergite 3 in basal 0.6, and following tergites more or less entirely dark brown to black dorsally.

Male. Labium almost reaching past posterior end of first metasomal tergite. Maxillary and labial palps not discernible, probably short. Antennal flagellum with 22 flagellomeres. Occipital carina dorsally fine but distinct, laterally and ventrally indiscernible. Mesopleuron very finely punctate peripherally, centrally (above foveate groove) polished and impunctate (Fig. 5 ). Fore wing (Fig. 3 ) with intercubitus (2 rs-m) somewhat shorter than abscissa of cubitus between intercubitus and second recurrent vein (abscissa of M between 2 rs-m and 2 m-cu). Basal metasomal tergites slenderer than in female. Thyridial depression shallow. Fore and mid coxae slightly darkened with brown, tibiae and tarsi less infuscate than in female. Otherwise similar to female.

Type material.

Holotype female (UAT), Mexico, Tamaulipas, NE of Miquihuana, Rancho Obed Hernández, 2500 m, Malaise trap, 25.IX-7.X.2011, coll. E. Ruíz-Cancino & J.M. Coronado-Blanco.

Paratype. 1 male (EMUS) Mexico, Nuevo León, 32 km W of Linares, San Pedro Iturbide, 26.X.1962, coll. H. & M. Townes, " Probles sp. 37 Tow. 1969".

Etymology.

From the Latin brevis (small, short) and palpus (palp, feeler), after its short maxillary and labial palps.

Figures

Figures 1 - 6. Labilochus brevipalpis sp. n., holotype female (1, 2, 6) and paratype male (3 - 5). 1 antenna 2 head and mesosoma, lateral view 3 fore wing 4 head and mesosoma, dorsal view 5 mesopleuron 6 propodeum and base of metasoma, dorsal view.