Revision of the Neotropical species of Trichacis Foerster (Hymenoptera: Platygastroidea: Platygastridae), with description of 24 new species Author Arias-Penna, Tania Milena Author Masner, Lubomir Author Delsinne, Thibaut text Zootaxa 2012 3337 1 56 journal article 10.5281/zenodo.281325 706d7536-7046-48ee-a586-a7bd417b58eb 1175-5326 281325 Trichacis concavata Arias-Penna & Masner , new species Figures 5 D–5G Female . Body length: 1.40 mm ( holotype ). Black shining; A1–A6 yellow; A7–A10 brown; mandible black with apex brown; fore and mid legs yellow and hind leg brown; coxae dark brown; fore wing infuscate. Head, in dorsal view, 2.2 times wider than long; EH <IOS; interocellar area finely coriaceous; OOL = LOL; antennal clava 3-segmented; A1 not reaching vertex dorsal margin; A2–A4, A8, A10 longer than wide; A5–A6 as long as wide; A7–A9 wider than long; base of mandible smooth; frons above torulus and interantennal process with three marked transverse striae; interantennal process smooth and surpassing ventral border of torulus; clypeus hidden by interantennal process; clypeal margin truncate; gena striate; vertex laterally coriaceous and medially smooth; temple projection absent; hyperoccipital carina incomplete: in dorsal view, hyperoccipital carina surpassing level of imaginary line connecting eye inner margin to posterior cephalic margin; distance between posterior ocellus and hyperoccipital carina shorter than posterior ocellus diameter. Mesosoma arched; antero-admedian line present; notaulus anteriorly incomplete and weakly marked; lateral notaular area with coriaceous sculpture along its anterior margin; inter-notaular area with coriaceous sculpture in 1/ 3 anterior, and with posterior 2/3 smooth; posteromedial region of inter-notaular area broadly concave; parapsidal line present; central pronotal area smooth; specialized area of mesoscutellum heart-shaped; median projection of specialized area of mesoscutellum subtriangular; mesopleural carina incomplete (length of mesopleural carina/ length of mesopleuron = 0.72); fore wing distinctly surpassing apex of metasoma. Metasoma moderately elongate; combined length of T3–T6 <T2; T1 longer than wide; T2 slightly shorter than wide; T3–T5 wider than long; anteromedial area of T2 smooth and slightly concave; T3 densely covered by shallow punctuation; T4–T6 densely covered by deep punctuation; T6 subtriangular. Male. Unknown. Etymology. The name of the species refers to the concavity of the posteromedial region of the inter-notaular area. Diagnosis . Trichacis concavata is the single species with posteromedial region of inter-notaular area concave, and with OOL = LOL. Material examined. Holotype : 1 Ƥ, COSTA RICA , Alajuela, Reserva Rincón Forestal, Estación Caribe, 10º53´N 85º18´W , 400 m , February 19–20 2003 , SS, J.S. Noyes ( CNCI ). Holotype is deposited in CNCI .