Mexican cardiochiline genera (Hymenoptera: Braconidae), including a preliminary assessment of species-groups in Toxoneuron Say and Retusigaster Dangerfield,Austin and Whitfield

The Mexican species of the braconid subfamily Cardiochilinae are reviewed. Forty-five species are recognized from Mexico, though many of these remain undescribed. Seven species are described as new and one, Toxoneuron levis (Mao), is redescribed. Species-groups are delineated for the New World species of Toxoneuron Say and Retusigaster Dangerfield, Austin and Whitfield and the genera are re-defined with respect to one another. Two new species are described in both Retusigaster and Toxoneuron. The atypical nature of the two included in Toxoneuron is discussed. Hansonia, Heteropteron and Schoenlandella are newly recorded for Mexico with one new species described for each. The placement of all New World species previously included in Schoenlandella is discussed, and several of these species are returned to Cardiochiles s. s. Distribution patterns of the Mexican species are discussed and an annotated key is presented for the 28 described species recorded from Mexico.