Eucremastus

Gadallah, Neveen S., Soliman, Ahmed M. & Al Dhafer, Hathal M., 2017, First record of the genus Eucremastus Szépligeti, 1905 (Hymenoptera: Ichneumonidae: Cremastinae) from the Arabian Peninsula, with the description of three new species, Zootaxa 4216 (4), pp. 339-354 : 340-341

Key to Eucremastus species of Saudi Arabia (based on females)

1. Body entirely lemon yellow ( Fig. 4 A, B); fore wing vein Rs distinctly concave ventrally ( Fig. 5 A); pterostigma broadly triangular, 2.9 × as long as broad; fore wing vein R1 about as long as pterostigmal length ( Fig. 5 A).......... E. flavus sp. nov.

- Body ivory white, with few black especially on metasomal T2 medio-basally ( Figs 2 A, 8A); fore wing vein Rs slightly concave to nearly straight ventrally; pterostigma narrowly triangular, 3.8‾4.0 × as long as broad; fore wing vein R1 shorter than

pterostigmal length (0.7‾0.8 ×)......................................................................... 2 2. Antenna with distinctly dark brown flagellomeres ( Fig. 8 D); antenna with 29 flagellomeres; ocelli small; MOD 1.3 × OOD; IOD 2.0 × OOD ( Fig. 8 B, D)........................................................ E. rufoantennalis sp. nov. - Antenna with pale brown to yellowish or ivory white flagellomeres ( Fig. 2 C); antenna with 34 flagellomeres; ocelli large; MOD 1.6 × OOD; IOD 2.5 × OOD ( Fig. 2 B, C).............................................. E. arabicus sp. nov.

Figures

FIGURE 2 (A ̄ F) Eucremastus arabicus sp. nov. (holotype ♀): A. lateral habitus; B. frontal view of head; C. dorsal view of head and basal segments of antennae; D. dorsal view of head and mesosoma; E. lateral view of head and mesosoma; F. fore wing.

FIGURE 4 (A ̄ D) E. flavus sp. nov. (holotype ♀): A. lateral habitus; B. dorsal habitus; C. frontal view of head; D. lateral view of head and mesosoma.

FIGURE 5 (A ̄ D) E. flavus sp. nov. (holotype ♀): A. fore wing; B. hind wing; C. mid tibial spur; D. apex of metasoma and ovipositor.

FIGURE 8 (A ̄ E) E. rufoantennalis sp. nov. (paratype ♀): A. lateral habitus; B. frontal view of head; C. mandibles; D. dorsal view of head and basal segments of antennae; E. dorsal view of mesosoma.