Dilophotopsis stenognatha Schuster 1958

Dilophotopsis stenognatha Schuster, 1958, ♂ ♀ (Figs 180–181, 184, 187, 192–193, 202–205, 214–217) Dilophotopsis stenognatha Schuster, 1958: 74. Holotype male: USA, Arizona, Tucson, 20.V.1935, Bryant (UMSP), examined. Dilophotopsis stenognatha: Mickel 1963: 184. Female description. Diagnosis. FEMALE. This species can be recognized by coloration and metasomal shape: the mesonotum and T2 disc are covered with orange setae (Figs 180–181), and the T2 disc is distinctly flattened mesally with coarse areolations anteriorly. This species is consistently larger than other Dilophotopsis females. Body length 10–14 mm. MALE. This species can be immediately recognized by the slender mandible, with the dorsal and lateral margins nearly parallel beyond the ventral excision (Figs 203–204). Additionally, the mesosternal processes are triangular and smooth, the metasoma is largely blackened (Figs 192–193), the cuspis is rounded along the outer margin, and this species is generally larger than other Dilophotopsis males. Body length 14–18 mm. Material examined. MEXICO, Sonora, 8 mi SE Alamos (1♂, SDNHM); 16 mi SE Empalme, 8.V.1953 (1♂ MIUP, 11♂ EMEC). USA, Arizona: Maricopa Co., Gila Bend (1♀, UMSP); Scottsdale (1♀, ASUT); South Mountain Park (6♀, ASUT CASC); Vekol Wash, 5 km N I–8 (5♀, EMUS); Pima Co.: Downing Well (1♀, UMSP); Green Valley (1♀, CSCA); Organ Pipe National Monument (2♀, CASC); Organ Pipe National Monument, Twin Peaks (1♀, UAIC); Sabino Canyon (1♀, UMSP); small wash east of Tucson (2♀, CSCA EMUS); Tucson (2♀, UAIC UMSP); California, Imperial Co., Walters Camp Road, 5–6.V.1985, R. Parks (1♂, SDNHM). See Wilson and Pitts (2008) for additional records. Distribution. Mexico: Sonora; USA: Arizona and California. Remarks. This species is apparently limited to the eastern Sonoran Desert. The specimen from California was found near the Arizona border along the Colorado River.