Trichacis corrugata Arias-Penna & Masner, new species

Trichacis corrugata Arias-Penna & Masner, new species

Figures 5 H; 6A–6D

Female. Body length: 2.30 mm (holotype); 2.45 mm (paratype); mean length ± SD = 2.38 ± 0.11 mm. Black; A1–A6 yellow; A7–A10 brown; apex and basis of mandible brown, otherwise yellow; fore and mid legs yellow; hind leg with trochanter, femur, and basal 2/3 of tibia yellow, otherwise brown; coxae yellow; fore wing infuscate.

Head, in dorsal view, 2.2 times as wide as long; EH <IOS; interocellar area coriaceous; OOL> LOL; antennal clava 4-segmented; A1 not reaching vertex dorsal margin; A2–A6, A10 longer than wide; A7 as long as wide; A8–A9 wider than long; base of mandible smooth; frons above interantennal process and torulus with five deeply marked transverse striae, which almost reach inner margin of eye; interantennal process striate and surpassing ventral border of torulus; clypeus exposed; clypeal margin convex medially; gena striate; vertex laterally coriaceous; medial area of vertex covered by transverse striae between posterior ocellus and hyperoccipital carina, and smooth between hyperoccipital carina and occipital carina; 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 longer than posterior ocellus diameter.

Mesosoma arched; antero-admedian line present; notaulus anteriorly incomplete; lateral notaular area with coriaceous sculpture along its anterior margin; inter-notaular area coriaceous; posteromedial region of internotaular area convex; parapsidal line present; area of the pronotum between epomiae with anterior region smooth and rest coriaceous; specialized area of mesoscutellum heart-shaped and elevated; median projection of specialized area of mesoscutellum broadly triangular and curving up; mesopleural carina incomplete (length of mesopleural carina/length of mesopleuron = 0.34); fore wing distinctly surpassing apex of metasoma.

Metasoma elongate; combined length of T3–T6 <T2; T1 longer than wide; anteromedial area of T2 smooth and concave; T3 smooth along its anterior margin; T4–T6 densely covered by shallow punctuation; T6 subtriangular.

Male. Unknown.

Etymology. The name of the species refers to the striae on the vertex.

Diagnosis. T. corrugata and T. sculpturata have inter-notaular area coriaceous. The shape of the specialized area of mesoscutellum and the sculpture on vertex allow to separate these species.

Material examined. Holotype: 1 Ƥ, MEXICO, Tamps, Río Frío, nr. Gomez Farias, June 6 1983, UV. S. Peck & M. Kaulbars (CNCI); paratype: 1 Ƥ, EL SALVADOR: Santa Ana, Guachipilin, Montecristo, 1200 m, 14°27’N 89°22’W, August 2000, R. Menjivar, MT (CNCI).

Holotype is deposited in CNCI.