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 depressa Arias-Penna & Masner , new species Figures 7 E, 7F; 8A, 8B Female . Body length: 2.40 mm ( holotype ); 1.90–2.70 mm ( paratypes , n=4); mean length ± SD = 2.22 ± 0.33 mm . Black; A1–A10 dark brown; mandible yellow with apex brown; fore leg yellow; mid leg with trochanter, femur and base of tibia yellow, otherwise brown; hind leg dark brown; mid coxa yellow; hind coxa brown; fore wing infuscate. FIGURE 7. Bright field images of Trichacis species. A–D: Trichacis delsinnei Arias-Penna & Masner , n. sp. , Ƥ (holotype). A, habitus, dorsal view; B, habitus, lateral view; C, head, dorsal view; D, head and mesosoma, dorsal view. E, F: Trichacis depressa Arias-Penna & Masner , n. sp. , Ƥ (holotype). E, head and fore legs, anterior view; F, habitus, dorsal view. Head, in dorsal view, 2.1 times wider than long; EH> IOS; interocellar area with fine coriaceous sculpture; OOL> LOL; antennal clava 3-segmented; A1 distinctly surpassing vertex dorsal margin; A2–A10 longer than wide; base of mandible smooth; frons between external margin of torulus and inner margin of eye medially covered by delicate coriaceous sculpture; interantennal process truncate, smooth and reaching, but not surpassing, ventral border of torulus; clypeus exposed; clypeal margin truncate; gena smooth; vertex laterally coriaceous and medially smooth; temple projection absent; hyperoccipital carina incomplete: in dorsal view, hyperoccipital carina fading before reaching 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 slightly arched; antero-admedian line present; notaulus anteriorly incomplete; lateral notaular area with coriaceous sculpture along its anterior margin; inter-notaular area with anterior 1/3 coriaceous and smooth in its posterior 2/3; posteromedial region of inter-notaular area broadly convex; parapsidal line present; central pronotal area smooth; specialized area of mesoscutellum heart-shaped, moderately elevated, with a rather broad tuft of hairs; mesopleural carina incomplete (length of mesopleural carina/length of mesopleuron = 0.12); fore wing not surpassing apex of metasoma. Metasoma distinctly elongate and depressed dorsoventrally; combined length of T3–T6> T2; T1–T2 longer than wide; T3–T6 wider than long; anteromedial area of T2 smooth and flattened; T3–T5 with some parts smooth and densely covered by shallow punctuation; T6 densely covered by shallow punctuation along its anterior margin and rest smooth; T6 subtriangular. Male. Unknown. Etymology . The name of the species refers to its depressed metasoma. Diagnosis. Trichacis depressa and T. acarinata have combined length of T3–T6> T2. T. depressa is hitherto the only Neotropical species with a depressed metasoma and with EH> IOS. Material examined. Holotype : 1 Ƥ, COSTA RICA , San José, Cerro de la Muerte, 19 km S, 3 km W Empalme, 2600 m , April–July 1992 , MT, P. Hanson ( CNCI ); paratypes : 3 Ƥ, with same data as holotype , (2 at CNCI and 1 at ICN ); 1 Ƥ S.J. Cerro de la Muerte. November 1992 , 2600 m , MT, P. Hanson ( CNCI ). Holotype is deposited in CNCI .