Laelius Ashmead includes 54 known nominal species worldwide. We present a revision of the Neotropical species of Laelius and provide keys for the identification of males and females of these species. We propose fourteen nomenclatural changes and additions. For the Neotropics, seven new species from Brazil are described and illustrated: Laelius arryni sp. nov. which has clypeus bearing median lobe with apical margin straight; propodeal disc with inner discal carina complete; aedeagus with apical lobes touching each other and inner margin with hook-shaped process, L. baratheoni sp. nov. which has propodeal disc with second pair of discal carinae incomplete; genitalia with paramere wing-shaped; with long setae around the margin and cuspis wide, L. lannisteri sp. nov. which has median lobe of clypeus with apical margin straight; mesopleuron with mesopleural suture distinct; genitalia with paramere slender and angled, cuspis wide, L. martelli sp. nov. which has pronotum with series of foveae posteriorly; genitalia with paramere slender and placed dorsally, aedeagus not reaching apex of paramere, L. targaryeni sp. nov. which has head with clypeus wide and with apical margin rounded; propodeal disc without longitudinal ridge between median and inner discal carinae; forewing with r-rs & Rs longer than Rs+M, L. tullyi sp. nov. which has head densely punctate; pronotal disc, mesoscutum and mesoscutellum rugulose; mesopleuron with mesopleural suture not fused with posterior fovea, L. starki sp. nov. which has mesoscutellar sulcus straight; mesopleuron with all foveae closed; genitalia with paramere club-shaped and with aedeagus wide. For the Nearctic region, Laelius areolatus (Rosmann & Azevedo, 2005) is a new junior synonym of Laelius pedatus (Say, 1836) and lectotypes for L. rufipes Ashmead, 1893, L. nigripilosus Ashmead, 1893, L. tricarinatus Ashmead, 1893, L. trogodermatis Ashmaed, 1893, and Mesitius nigripilosus Ashmead, 1895 are designated. We also propose the name Laelius billi Barbosa & Azevedo nom. nov. for Mesitius nigripilosus Ashmead, 1895 and re-erect Laelius huachucae (Evans, 1965) from L. nigripilosus (Ashmead, 1895). As result, Laelius now includes 61 species, 15 of which are from the Neotropical region.

Melanepyris Kieffer, 1913 was proposed to accommodate a single species of Epyris Westwood, 1832, E. imicola Kieffer, 1913, mainly based on the absence of the posterior propodeal carina. Today, Melanepyris includes only two nominal species. The type-material of these species has been considered lost since their original description. In this study, the single known adult male (holotype) of Melanepyris asiaticus Kieffer, 1922 from the Philippines has been rediscovered, redescribed and illustrated. Melanepyris asiaticus is transferred to Epyris Westwood due to the following features: scutellar groove absent, well separated scutellar pits and lower mesopleural fovea large and with undefined upper margin. We checked the original description of M. imicola and concluded that it also fits the definition of Epyris perfectly, except for the (described) absence of a posterior carina. However, the thickness of the posterior carina of the propodeal disc varies within species of different Epyrinae genera. The diagnostic characters used by Kieffer to create Melanepyris and other genera from Epyris are briefly discussed. Melanepyris is proposed as a new junior synonym of Epyris, with the transfer of M. imicola to Epyris.

Solepyris Azevedo é um gênero neotropical raramente coletado. O gênero é reconhecido dentre os gêneros de Sclerodermini por possuir a nervação das asas anteriores com apenas uma célula fechada grande. É descrita e ilustrada uma segunda espécie, Solepyris montuosus, sp. nov., do Brasil. Esta espécie é caracterizada por possuir a nervura radial da asa anterior longa. É incluída uma diagnose emendada de Solepyris unicus Azevedo. Foi fornecida uma chave para as duas espécies de Solepyris.

Solepyris Azevedo is a rarely collected Neotropical genus. It is differentiated from other Sclerodermini genera by having the fore wing venation with a single large closed cell and currently is monotypic containing S. unicus Azevedo. A second species, Solepyris montuosus, sp. nov., from Brazil is described and illustrated. This new species is diagnosed by having radial vein of the fore wing long. An amended diagnosis of Solepyris unicus Azevedo is included. A key for the two species of Solepyris is provided.

Epyris rotundus sp. nov. and Epyris cochlear sp. nov., from southern Brazil, are described and illustrated. Epyris longus Corrêa & Azevedo, 2002, E. argentinicus Evans, 1969, E. angustatus Evans, 1969, E. perpolitus Evans, 1969, E. parallelus Evans, 1969, E. distinctus Corrêa & Azevedo, 2002, E. variatus Corrêa & Azevedo, 2002, E. jugatus Evans, 1969, E. intermedius Evans, 1969 and E. depressigaster Evans, 1966 are recorded for the first time to Paraná, Brazil.