A taxonomic study of Costa Rican with the description of twenty-four new species (Hymenoptera, Braconidae, Cheloninae).

The genus Shaw was described in 1983, but prior to the current study only one Neotropical species had been described from Mexico and none were named from Costa Rica. In this paper twenty-four new species are described and named from Costa Rica: Dadelahi & Shaw, , Dadelahi & Shaw, , Dadelahi & Shaw, , Dadelahi & Shaw, , Dadelahi & Shaw, , Dadelahi & Shaw, ., Dadelahi & Shaw, , Dadelahi & Shaw, , Dadelahi & Shaw, , Dadelahi & Shaw, , Dadelahi & Shaw, , Dadelahi & Shaw, , Dadelahi & Shaw, , Dadelahi & Shaw, , L.

Revision of the genus (Hymenoptera: Braconidae: Euphorinae: Centistini) of Costa Rica.

This paper provides the first taxonomic revision for the euphorine genus Centistes from a Neotropical country. Twenty-three new species are described: C. achterbergi sp.

An illustrated key to Neotropical species of the genus Meteorus Haliday (Hymenoptera, Braconidae, Euphorinae).

A comprehensive key for 75 species of Meteorus distributed across 15 Neotropical countries is presented. Eleven new species from Bolivia, Costa Rica and Ecuador are described: Meteorusalbistigma, Meteoruscarolae, Meteoruseurysaccavorus, Meteorusfallacavus, Meteorusflavistigma, Meteorushaimowitzi, Meteorusmagnoculus, Meteorusmartinezi, Meteorusmicrocavus, Meteorusnoctuivorus and Meteorusorion. Expanded range distributions are recorded for Meteorusandreae, Meteorusfarallonensis, Meteorusguineverae, Meteorusjerodi, Meteoruskraussi, Meteoruspapiliovorus and Meteorusquimbayensis.

Neotropical species of Meteorus Haliday (Hymenoptera: Braconidae: Meteorinae) parasitizing Arctiinae (Lepidoptera: Noctuoidea: Erebidae).

Three new species of Meteorus parasitoids of Arctiinae are described: Meteorus anuae n. sp., M.