Rhinotorus ovalis ( Davis, 1897 )

Reshchikov, Alexey V., 2016, A revision of the genus Rhinotorus Förster, 1869 (Hymenoptera, Ichneumonidae, Ctenopelmatinae), with descriptions of three new species and an illustrated identification key, European Journal of Taxonomy 235 (235), pp. 1-40 : 27-28

Rhinotorus ovalis ( Davis, 1897)

Fig. 11

Spudaea ovale Davis, 1897: 291–292 , lectotype examined.

Diagnosis

This species is distinguished from other species in the genus by the following characters: face with yellow spots ( Fig. 11B ); scutellum yellow ( Fig. 11C ); tarsus and hind tibia with reddish colouration ( Fig. 11 C–D).

Type material examined

Spudaea ovale Davis, 1897: 291–292 . Lectotype ♀, U.S.A., New Hampshire, ANSP.

Description

Female

Fore wing around 7 mm long. Antenna slender, about as long as fore wing, with 30 flagellomeres. Ratio of length of 1 st plus 2 nd flagellomeres to eye height 1.1. Scape 1.2 times as long as broad. Head not narrowed behind eyes, matt, with dense, strong punctures on shagreened surface. Lateral ocellus separated from eye margin by 1.4 times their widest diameter. Face transverse, 2 times as broad as long, and densely punctate ( Fig. 11B ). Clypeus 0.4 times as high as wide, distinctly separated from face by deep impression, strongly projecting medially, shining and sparsely punctate, its apical margin obtuse medially and impressed laterally. Clypeal fovea deep. Malar space 0.7 times basal mandible width. Occipital carina complete. Mandible teeth of equal length.

Mesoscutum weakly shining, finely granulate, with dense and uniformly strong punctation. Notaulus distinct. Mesopleuron shining, distinctly densely and strongly punctate. Metapleuron weakly shining, with rather dense punctation. Propodeum weakly rugose ( Fig. 11C ). Area superomedia fused with area basalis, their combined area 2.5 times as long as broad. Costula absent. Area apicalis trapezoidal, 0.5 times as long as broad, and equal to 0.5 of propodeum, often with longitudinal carina and sometimes with striation. Spiracles weakly oval, 1.5 times as long as broad. Hind femur 4 times as long as broad. Hind tibia 7 times as long as apically broad. First tarsomere of hind leg 6.8 times as long as broad and 2.4 times as long as second tarsomere. Claws not pectinate. Fore wing with pterostigma elongate, around 3.7 times as long as broad and intercepted by Rs at its middle. 2m-cu straight, with a single bulla. Cu-a vertical, interstitial. Hind wing with 1/Cu & cu-a intercepted by 2/Cu in lower 0.5.

Metasoma strongly punctate and reticulate rugose ( Fig. 11A, C ). First metasomal tergite as long as broad apically and projecting dorsally, its dorsal longitudinal carinae reaching apical part of tergite and with a strong impression between carinae in its basal part. Area between dorsal carina and spiracle with impression. Spiracles projecting laterally. Subapical impression strong, slightly wider laterally than medially. First metasomal sternite 0.2 times as long as its tergite. Second metasomal tergite 0.5 times as long as apically broad, its transverse impression starting immediately after middle of tergite. Third tergite with a weak transverse impression. Ovipositor sheaths weakly cone-shaped and 0.8 times as long as height of last visible tergite. Ovipositor stout at base with a shallow subapical notch.

Colouration: body mostly black ( Fig. 11 ); clypeus, spots on face, mandibles and tegulae yellow; antennal flagellomeres and legs (except apical part of hind tibia and hind tarsus) reddish.

Male

Unknown.

Host records

Hemichroa crocea (Geoffroy, 1785) .

Distribution

U.S.A. (Colorado, Michigan, New Hampshire).

Figures

Fig. 11. Rhinotorus ovalis (Davis, 1897), lectotype, ♀. A. Metasoma dorsally. B. Face. C. Habitus dorsally. D. Habitus laterally.