No description available.

Niteobrachis, a new genus in the tribe Brachistini (Hymenoptera: Braconidae: Helconinae), is described. The genus is endemic to the New World and contains 24 species, all of which are newly described: amazonicus, attonitus, candeo, carmenae, clarus, delicatus, elegans, fulgeo, gracilis, gustus, ictus, insignis (type species), luceo, lucidus, luisi, lumen, luminosus, luna, mico, nitidus, serenus, splendidus, subtilis and venustus. Keys to the species of Niteobrachis and to the genera of Brachistini are given. Niteobrachis is diagnosed by a combination of characters in the metasoma, including the absence of striations and/or sculpturing on the second and third median tergites with a glossy/smooth appearance; a shallow suture between the second and third median tergites; presence of a crease that separates the second median tergite from the second laterotergite; absence of a crease that separates the third median tergite from the third laterotergite; fused second and third laterotergites; the lateral longitudinal carinae of the first median tergite reaching the articulation between the first and second median tergites; and the first three median tergites covering most of the remainder of the metasoma. The monophyly of Niteobrachis is supported by two synapomorphies: a minute median longitudinal carina of the propodeum, and the lateral longitudinal carinae of the first median tergite reaching the articulation between the first and second median tergites. Recognition of this genus resulted from a phylogenetic analysis of six tribes of Helconinae, including most genera of Brachistini based on a data matrix of 49 characters and 18 terminal taxa. The phylogenetic affinities of the genus are examined, a sister group relationship with Foersteria Szepligeti is hypothesized, and the problematic placement of the subgenera of Eubazus Nees is considered.