Erythrodolius tenebrosus Bennett, Sääksjärvi

Bennett, Andrew M. R., Sääksjärvi, Ilari E. & Broad, Gavin R., 2013, Revision of the New World species of (Hymenoptera: Ichneumonidae: Sisyrostolinae), with a key to the world species, Zootaxa 3702 (5), pp. 425-436 : 425-436

Erythrodolius tenebrosus Bennett, Sääksjärvi , & Broad sp. n.

Figs 4 , 8 , 12

Diagnosis. E. tenebrosus sp. n. is the darkest species of Erythrodolius thus far described. Almost the entire dorsal surface of this species is dark brown ( Fig. 4 ). It is the only described species in which the scutellum and frons are predominantly dark brown. These areas are completely yellow to brownish yellow in the next darkest described species ( E. griffithsorum ).

Description. Female. Fore wing length 9.8 mm. Face about 2.4 times as wide as high, punctate, the punctures separated by about their own diameter. Malar space about 0.8 times as high as basal width of mandible. Clypeus with a low, rounded medial tooth ( Fig. 4 ). Ocellar-ocular distance 2.1 times as long as maximum diameter of posterior ocellus. Antenna with 30 flagellomeres.

Mesoscutum polished and finely punctate, punctures in middle of lateral lobe separated by 1 to 2 times their own diameter, medial lobe only slightly more coarsely and densely punctate. Scutellum with lateral carinae at base only. Mesopleuron polished with fine punctures separated by 1 to 2 times their diameter, except impunctate on speculum. Metapleuron irregularly rugose ventrally, sparsely punctate dorsally, punctures separated by one to two times their diameter, juxtacoxal carina incomplete. Propodeum with all carinae present ( Fig. 12 ), surface impunctate and polished.

Tergite 1 3.1 times as long as posteriorly wide. Tergite 2 without oblique grooves. Ovipositor slightly upcurved basally and medially, straight apically, about 0.8 times as long as length of hind tibia ( Fig. 4 ).

Dark brown. Entire dorsal surface of insect dark brown except lateral surfaces of scutellum, area posteroexterna, petiolaris and posterior parts of area dentipara and superomedia of propodeum, anterior quarter of tergite 1 of metasoma and a band on extreme posterior of tergite 2 and extreme anterior of tergite 3 brownish yellow. Scape and pedicel medium brown, basal 4 flagellomeres yellow, flagellomeres 5+ blending from yellowish brown to dark brown at apex of antenna. Face yellow except a narrow vertical medial dark brown stripe. Clypeus medium brown. Gena dark brown dorsally blending to yellow ventrally. Palpi brownish yellow. Pronotum dark brown in dorsal half and brownish yellow in ventral half. Tegula medium brown. Mesosomal pleura mostly dark brown except propleuron medium brown, irregular patches of mesopleuron especially near subtegular ridge, anterior to epicnemial carina and speculum brownish yellow; metapleuron medium brown dorsally and yellowish brown ventrally. Fore and mid legs yellow except femora (except basally on ventral surface) and distal tarsomere medium brown. Hind leg medium brown except tibia and basal four tarsomeres yellow, apex of coxa and trochanter slightly paler than base of coxa and femur. Dorsal surface of metasoma dark brown except as noted above. Laterotergites dark brown except on segment 1, edges of segment 2 and base of segment 3 yellow. Hypopygium medium brown. Ovipositor sheaths and ovipositor dark brown except ventral valve of ovipositor light brown in apical half. Wings tinged uniformly yellow (no darkening at apex of fore wing), pterostigma brown at edges, translucent orange brown medially ( Fig. 4 ).

Male. Unknown.

Distribution. Mexico (Quintana Roo).

Material examined. Holotype: ♀: MEXICO: Quintana Roo, Cobá. 11.xii.1993. L. Masner ( CNC). Condition of type: intact except missing right fore leg beyond basal trochantellus.

Etymology. The specific name refers to the dark colour of this species, darker than in other New World Erythrodolius .

Figures

FIGURE 4. Lateral habitus, Erythrodolius tenebrosus, female, holotype.

FIGURES 5 – 8. Head, anterior view, Erythrodolius spp. females. 5. E. griffithsorum, non-type (ZMUT); 6. E. incompletus, holotype; 7. E. luteus, holotype; 8. E. tenebrosus, holotype.

FIGURES 9 – 12. Propodeum, dorsoposterior view, Erythrodolius spp. females. 9. E. griffithsorum, non-type (ZMUT); 10. E. incompletus, holotype; 11. E. luteus, holotype; 12. E. tenebrosus, holotype.