Genus Schizopyga Gravenhorst, 1829

Schizopyga Gravenhorst 1829: 125 . Type species: Schizopyga podagrica Gravenhorst, 1829, by monotypy.

References. Cresson 1870: 159 [1 species (described as new) in Ameica north of Mexico]. Townes & Townes 1960: 224 [description; review of 2 Nearctic species; key]. Townes 1969: 101 [diagnosis]. Carlson 1979: 335 [catalogue; 2 species in North America]. Gauld & Dubois 2006: 542 [remarks on taxonomy]. Sun & Sheng 2011 [1 new species from China (Jiangxi)]. Varga & Reshchikov 2018 [1 new species from Kongo and Uganda; remarks on taxonomy].

Gauld & Dubois (2006: 542) synonymized Dreisbachia under Schizopyga, but subsequently the Dreisbachia was resurrected (Shaw 2006; Matsumoto 2016), and in this paper we consider Dreisbachia and Schizopyga as two separate genera. Recently, Matsumoto (2016) described a new genus Iania Matsumoto for the Western Palaearctic species Schizopyga pictifrons (Thomson) . Schizopyga anseli Fernández-Triana from Cuba and S. moreirai Loffredo & Penteado-Dias from Brazil are transferred here to Dreisbachia (comb. nov.).

Schizopyga is a small predominantly Holarctic genus with nine species, including one species in the Afrotropical region (Varga & Reshchikov 2018), one in tropical China (Sun & Sheng 2011) and two in the Nearctic region (both are Holarctic, i.e. occur also in the Palaearctic region). One species is recorded here from Mexico.

Species of the genus are koinobiont ectoparasitoids of adult spiders of the families Clubionidae, Gnaphosidae and Agelenidae .

Key to species of Schizopyga occurring in Mexico

1. Hind tibia reddish brown with a single black mark on distal end (Fig. 73). Metasomal tergites 1 to 5 reddish brown, distal tergites black (Figs 68, 69). Propodeum dull....................................... 1. S. circulator pulchra Walley

– Hind tibia whitish with subbasal and apical black marks (Fig. 74). Metasomal tergites entirely black (Fig. 72). Propodeum subpolished........................................................................... S. frigida Cresson