Thoron dux, JOHNSON & MASNER, 2004

JOHNSON, NORMAN F. & MASNER, LUBOMIR, 2004, The Genus Thoron Haliday (Hymenoptera: Scelionidae), Egg-Parasitoids of Waterscorpions (Hemiptera: Nepidae), with Key to World Species, American Museum Novitates 3452, pp. 1-16 : 9-10

Thoron dux , new species

Figure 17

DESCRIPTION: Length 1.7 mm. Female A4 subequal to or shorter than A3; clava robust,

3.2 times longer than wide; apex of A1 well below top of vertex; female A2–A4 bright yellow, contrasting with dark brown A5–A7; male A11 1.6–1.8 times as long as wide; ocelli large, lateral ocellus separated from inner orbit by one­half diameter of posterior ocellus; central portion of mesoscutum and scutellum at most with minute setigerous punctures (fig. 17); notaulus very short, not extending anteriorly to level of posterior margin of tegula; mesoscutum with both long bristles and shorter underlying pilosity; metapleuron sparsely setose anteriorly, posterior portion of metapleuron and lateral face of propodeum nearly glabrous; marginalis not thickened, as wide as submarginal or basal portion of stigmal vein; postmarginal vein clearly developed, longer than stigmal vein; dorsellum spinose medially, short, subtriangular; dorsal surface of propodeum not excavate; all coxae yellow; hindfemur almost entirely honey­yellow to yellow, concolorous with apex of coxa; T1 without hump, longitudinally costate throughout; costae on T2 reaching at least to posterior third of tergite; T2 distinctly shorter than T3; T3 wider than long.

DIAGNOSIS: Similar to T. rex in the yellow color of the antennal segments 2–4 in the female; distinguished from rex by the presence of a spine on the dorsellum.

ETYMOLOGY: From the Latin, dux , for prince or leader, and alluding to its similarity with T. rex .

MATERIAL EXAMINED: Holotype female: BO­ LIVIA: Santa Cruz, Ichilo, ‘‘ El Chore’ ’ pools, 17 ° 01 ̍ S, 64 ° 11 ̍ W, 253 m, 9–11.v.1997, L. Masner, yellow pan traps, OSUC 77426 ( CNC type no. 22864). Paratypes: 1 female with same data as holotype ( OSUC 77427 ) . Santa Cruz, Andres Ibañez, Potrerillo , 17 ° 40 ̍ S, 63 ° 27 ̍ W, 438 m, 13– 16.v.1997, L. Masner, yellow pan traps, 13, 1♀ ( OSUC 77428 , 77429 ) .

Figures

Figs. 15–20. 15, Thoron dayi, n.sp., mesosoma, dorsal view; 16, T. longicornis Masner and Huggert, head and mesosoma, dorsal view; 17, T. dux, n.sp., head and mesosoma, dorsal view; 18, T. rex, n.sp., head and mesosoma, dorsal view; 19, T. lautus (Masner), posterior mesosoma, dorsal view; 20, T. lautus (Masner), metapleuron, propodeum, and T1 horn, lateral view. Scale bar in millimeters.