Lagideus isidro Smith

Smith, David R., 2012, The South American genus Lagideus Konow (Hymenoptera: Pergidae: Syzygoniinae), a Supplement, Zootaxa 3413, pp. 1-18 : 13-16

Lagideus isidro Smith , new species

( Fig. 23 )

Female. Length, 7.0 mm. Antenna and head black, labrum brown. Thorax black. Fore and midlegs white except coxae black; hind leg with coxa black, femur and tibia each white with about apical quarter black, and tarsi black. Abdomen black with basal plates white. Wings hyaline; veins and stigma black. Head: Vertex and frons shiny, without punctures; covered with fine white hairs. Antennal length 1.5 × head width, antennomeres 3–7 serrate, each slightly broader at apex than at base; antennomeres 5–7 each about 2 × longer than broad; antennomere 3 slightly shorter than antennomere 4. Malar space broad, almost equal to diameter of front ocellus. 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 straight above, rounded at apex and below, in dorsal view broad at base and tapering to acute apex (as Smith 1990, fig. 293). Lancet ( Fig. 23 ) with about 16 serrulae, serrulae with fine anterior and posterior subbasal teeth, depth of serrulae decreasing toward apex; annuli 1 and 2 with short hairs, annuli 3–11 with longer spines, those on annuli 6–11 longer on dorsal half than on ventral half, annuli 12 to apex lacking hairs or spines.

Male. Unknown.

Type material. Holotype female “ Costa Rica: San Jose: Cerro de la Muerte, 26 km N. San Isidro, 2100 m , VIII-IX-1991, P. Hansen” (1 Ƥ, INBio).

Etymology. The name is from the type locality, San Isidro , a noun in apposition.

Remarks. This is the only Central American species with the abdomen black and basal plates white. It will key to couplet 15, L. wygodzinskyi Malaise, 1949 , in my 1990 key, but the lancet of L. wygodzinskyi ( Smith 1990: fig. 313) has very fine annular hairs, not the thick long spines on annuli 3–11 as in L. isidro ( Fig. 23 ).

Figures

FIGURES 19 – 23. Female lancets. 19, Lagideus flavus. 20, L. albitarsis. 21, L. longicus. 22, L. tapanti. 23, L. isidro.