The South American genus Lagideus Konow (Hymenoptera: Pergidae: Syzygoniinae), a Supplement Author Smith, David R. text Zootaxa 2012 3413 1 18 journal article 10.5281/zenodo.281904 8cc68a0c-ce2b-48dd-8a3b-6f8f39de9250 1175-5326 281904 Lagideus magdalena Smith , new species ( Fig. 17 ) Female. Length, 7.4 mm. Black; white only on legs as follows: trochanters, most of outer surface of fore femur, basal two-thirds of hind femur, basal two-thirds of hind tibia, most of fore tibia; basal third of midtibia, fore and midtarsomeres, and extreme apices of hind tarsomeres 1–3. Wings hyaline; veins and stigma black with extreme apex of stigma with white spot and extreme base of costa white. Head: Vertex and frons shiny, without punctures; covered with fine white hairs. Antennal length 1.3 × head width; filiform, antennomeres not serrate, about as broad apically as basally; antennomeres 5–7 about 1.5 × longer than broad; antennomeres 3 and 4 subequal in length. Malar space almost linear. Thorax: Hind basitarsomere subequal to length of remaining tarsomeres combined; inner hind tibial spur about 0.75 length of hind basitarsomere. Abdomen: Sheath in lateral view rounded at apex, in dorsal view broad at base, tapering to acute apex (similar to Smith 1990 , fig. 293). Lancet ( Fig. 17 ) with 18-19 serrulae; serrulae with fine anterior and posterior subbasal teeth; depth of serrulae decreasing toward apex; annuli 1–5 with short hairs, dorsal halves of annuli 6–11 with long spines, those on 8–11 nearly width of segments; ventral halves of annuli 6–11 with short hairs; annuli 11 to apex without hairs, or few short hairs ventrally. Male. Unknown. Type material. Holotype female “ Colombia : Magdalena , PNN Santa Marta La Estación, 10°48’N , 73°39’W , 2220m , Malaise, 8/31/00 – 9/15/00 , J. Cantillo, leg., M.633” ( HUM ). Etymology. Named for the type locality, Department of Magdalena , a noun in apposition. Remarks. This species is similar to L. luticus Smith, 1990 , described from Argentina , in couplet 13 of my 1990 key. The lancet of L. luticus ( Smith 1990, fig. 319 ) has 15–16 serrulae, and the dorsal halves of annuli 4–10 with long, dense spines which overlap and are longer than the segments. It is also similar to L. schmidti described below, but that species has most of the hind femora and tibiae black, and the lancet has only about15 serrulae with long spines on the dorsal halves of annuli 4–13, almost to the apex of the lancet. The antennae of L. schmidti are also more slender, with antennomeres 5–7 about 2 × longer than broad, and the malar space is broader, almost equal to the diameter of the front ocellus. See the preceding revised key to females for separation from similar species.