A new species of the genus Deinodryinus Perkins (Hymenoptera, Dryinidae) from the USA Author Speranza, Stefano Author Olmi, Massimo Author Guglielmino, Adalgisa Author Contarini, Mario text ZooKeys 2018 809 31 39 http://dx.doi.org/10.3897/zookeys.809.30647 journal article http://dx.doi.org/10.3897/zookeys.809.30647 1313-2970-809-31 453BD4A01DEE449084FB6BAA780B8B6E 453BD4A01DEE449084FB6BAA780B8B6E Genus Deinodryinus Perkins, 1907 Deinodryinus Perkins, 1907: 45. Type species. Deinodryinus paradoxus Perkins, 1907, designated by Muesebeck and Walkley (1951) . Diagnosis . Female (Fig. 1): Macropterous or micropterous; palpal formula 6/3; occipital carina complete; vertex of head frequently with two strong oblique keels connecting posterior ocelli to occipital carina; pronotum with distinct anterior collar and posterior disc; in macropterous females forewing usually with distal part of stigmal vein longer than proximal part, less frequently as long as, or shorter than proximal part; enlarged claw with inner proximal prominence not bearing bristles, with one or two bristles or peg-like hairs located further distally than proximal prominence; tibial spurs 1/1/2. Male: Macropterous (even with micropterous female); palpal formula 6/3; vertex of head frequently with two strong oblique keels connecting posterior ocelli to occipital carina; antennal hairs usually much longer than breadth of segments, less frequently shorter than breadth of segments; forewing usually with distal part of stigmal vein longer than proximal part, less frequently as long as, or shorter than proximal part; forewing usually with pterostigma four, or more than four, times as long as broad; paramere without dorsal process, usually with one more-or-less large inner branch wrapping penis, less frequently with one reduced inner branch; tibial spurs 1/1/2. Figure 1. Deinodryinus atriventris (Cresson), female from Ohio, Columbus: A habitus in dorsal view B head and mesosoma in dorsal view C head and mesosoma in lateral view D metapectal-propodeal complex in dorsal view E head in frontal view F forewing.