Lytoxysta brevipalpis Kieffer, 1909: 480.
Type: USNM (Menke & Evenhuis, 1991: 148).
Coloration. Head, mesosoma and metasoma black. Scape, pedicel, F1-F5 dark yellow; F6-F11 yellowish brown. Legs and veins yellowish brown.
Head. Triangular, higher than wide, covered by fine reticulated sculpture. Covered by very few scattered setae. Transfacial line 0.6 times height of compound eye. Malar space 1.1 times height of compound eye (Fig. i).
Antenna. Female: 13-segmented, filiform. Antennal formula: 3.8 (1.9); 3.7 (1.5); 2.3 (1.5); 2.1 (1.5); 2.8 (1.6) (Fig. b). Male: 13-segmented, filiform. Antennal formula: 3.2 (1.7); 3.5 (1.5); 2.5 (1.3); 2.5 (1.4); 3.2 (1.4) (Fig. c).
Mesosoma. Entirely covered by fine reticulated sculpture (Fig. e, Fig. g). Pronotum without carinae present (Fig. h). Apex of scutellum with irregular carinae (Fig. d). Propodeum covered by abundant long setae; two propodeal carinae thin and short on top (Fig. d).
Forewing. Longer than body. With dense pubescence and marginal setae. Radial cell open, 2.4 times as long as wide. R1 and Rs short, not reaching costal margin (Fig. a).