Diolcogaster is een geslacht van insecten uit de orde vliesvleugeligen (Hymenoptera) en de familie schildwespen (Braconidae).
Soorten D. abdominalis (Nees, 1834) D. adiastola Saeed, Austin & Dangerfield, 1999 D. alkingara Saeed, Austin & Dangerfield, 1999 D. alvearia (Fabricius, 1798) D. anomus (Viereck, 1913) D. ashmeadi Saeed, Austin & Dangerfield, 1999 D. auripes (Provancher, 1886) D. austrina (Wilkinson, 1929) D. bakeri (Muesebeck, 1922) D. basimacula (Cameron, 1905) D. belokobylskiji Kotenko, 2007 D. bifurcifossa Zeng & Chen, 2011 D. brevicauda (Provancher, 1886) D. brevivena Zeng & Chen, 2011 D. claritibia (Papp, 1959) D. connexa (Nees, 1834) D. curticornis (Granger, 1949) D. chaoi (Lou & You, 2004) D. dichromus Saeed, Austin & Dangerfield, 1999 D. duris (Nixon, 1965) D. eclectes (Nixon, 1965) D. euterpe (Nixon, 1965) D. facetosa (Weed, 1888) D. fasciipennis (Gahan, 1918) D. flavipes (Haliday, 1834) D. galazia Kotenko, 2007 D. garmani (Ashmead, 1900) D. gefidra Kotenko, 2007 D. grammata Zeng & Chen, 2011 D. hadrommatus Saeed, Austin & Dangerfield, 1999 D. harrisi Saeed, Austin & Dangerfield, 1999 D. hinzi (Nixon, 1965) D. indicus (Rao & Chalikwar, 1970) D. ineminens Zeng & Chen, 2011 D. ippis (Nixon, 1965) D. iqbali Saeed, Austin & Dangerfield, 1999 D. iridescens (Cresson, 1865) D. kasachstanica (Tobias, 1964) D. kasparyani Kotenko, 2007 D. laetimedia Zeng & Chen, 2011 D. lelaps (Nixon, 1965) D. longiterebra (Rao & Chalikwar, 1976) D. lucindae Saeed, Austin & Dangerfield, 1999 D. masoni Saeed, Austin & Dangerfield, 1999 D. mayae (Shestakov, 1932) D. merata Saeed, Austin & Dangerfield, 1999 D. minuta (Reinhard, 1880) D. muzaffari Saeed, Austin & Dangerfield, 1999 D. narendrani Rema & Sheeba, 2004 D. naumanni Saeed, Austin & Dangerfield, 1999 D. newguineaensis Saeed, Austin & Dangerfield, 1999 D. nixoni Saeed, Austin & Dangerfield, 1999 D. notopecktos Saeed, Austin & Dangerfield, 1999 D. periander (Nixon, 1965) D. perniciosa (Wilkinson, 1929) D. pluriminitida Zeng & Chen, 2011 D. praritas Zeng & Chen, 2011 D. procris (Fischer, 1964) D. punctata (Rao & Chalikwar, 1976) D. punctatiscutum Zeng & Chen, 2011 D. reales (Nixon, 1965) D. rixosa (Wilkinson, 1929) D. robertsi Saeed, Austin & Dangerfield, 1999 D. rufula Papp, 1991 D. rugosicoxa (Papp, 1959) D. scotica (Marshall, 1885) D. schizurae (Muesebeck, 1922) D. sons (Wilkinson, 1932) D. spreta (Marshall, 1885) D. stepposa (Tobias, 1964) D. tearae (Wilkinson, 1929) D. tegularia (Papp, 1959) D. translucida Zeng & Chen, 2011 D. tropicalus Saeed, Austin & Dangerfield, 1999 D. vulpina (Wilkinson, 1929) D. walkerae Saeed, Austin & Dangerfield, 1999 D. xanthaspis (Ashmead, 1900) D. yousufi Saeed, Austin & Dangerfield, 1999