Misetus strumiai Di Giovanni, Scaramozzino & Diller, 2018

Giovanni, Filippo Di, Scaramozzino, Pier Luigi & Diller, Erich, 2018, A new species of Misetus Wesmael, 1845 (Hymenoptera, Ichneumonidae, Ichneumoninae, Phaeogenini) from Italy, with updated key to the females of Palaearctic species, Zootaxa 4374 (4), pp. 594-600 : 596-600

Misetus strumiai Di Giovanni, Scaramozzino & Diller , sp. nov.

Figs. 5–8

Type material. Holotype, female. ITALY: Tuscany, Livorno, isle of Montecristo , 26.vi–13.vii.2012, Malaise trap, F. Strumia leg. ( ZSM).

Description. Female. Body length 5.4 mm. Fore wing length 2.9 mm.

Head. Face about 0.4–0.5> as high as wide (width between compound eyes at the level of clypeal suture; height from antennal sockets to clypeal suture), polished with well defined punctuation. Frons and vertex polished with dense and fine punctures; gena polished with few inconspicuous punctures. Temple sublinearly rounded in dorsal view; distance between lateral ocellus and eye about 0.8> as long as interocellar distance. Clypeus polished and shining, without punctures, its apical margin slightly convex and with a small developed medial tooth. Malar space about 1.0> as long as mandible width; malar sulcus coriaceous. Mandible about 2.5> as long as basally wide, teeth unequal, lower tooth clearly longer the upper one. Labial palps 4-segmented, maxillary palps 5- segmented, the first segment medially enlarged. Occipital carina complete, joining hypostomal carina at base of mandible. Antenna with 24 flagellomeres, first flagellomere about 2.1> as long as apically wide.

Mesosoma. Pronotum smooth and polished, with just few undefined punctures on dorsal part and small fine wrinkles on anterior and posterior margins; epomia absent. Mesoscutum with dense punctures, notaulus deeply impressed in the anterior half; scutellum with dense punctures, without lateral carinae. Mesopleuron, except for smooth speculum, covered with fine longitudinal striae; sternaulus impressed in the anterior half of mesopleuron; epicnemial carina present and reaching anterior margin of mesopleuron; mesosternum coriaceous–punctate; posterior transverse carina of mesosternum complete but weak at level of middle coxa. Fore wing areolet regularly pentagonal; cu-a opposite Rs &M; length of Cu1 between 1m-cu and Cu1a about 1.7> as long as Cu1b. Hind wing with distal abscissa of Cu1 present; length of Cu1 between cu-a and M about 2.2> as long as cu-a. Coxae coriaceous–punctate, subpolished. Hind femur about 2.8> as long as maximum width. Propodeum coriaceous, irregularly wrinkled, with propodeal carinae weakly marked, with the exception of posterior transverse carina and pleural carina; area superomedia as in Fig. 7 , about 1.3–1.4> as long as wide and with costulae originating from basal half of the area superomedia; area basalis not defined; area petiolaris strongly concave and transversally striate; metapleuron smooth in the anterior half, coriaceous and with irregular wrinkles on posterior half.

Metasoma. Metasoma, seen from above, narrowed from tergite III to apex, covered with fine, short and sparse pubescence. Tergite I with dorsal longitudinal carinae weak, median and lateral parts of postpetiole not differentiated; postpetiole with few punctures medially. Metasomal tergite II about 1.3–1.4> as long as apically wide, thyridia weakly marked and separated from the base, placed at about 0.25 the length of the tergite; tergite II slightly coriaceous at the basal 0.1, then polished, with very few scattered punctures. Remaining metasomal tergites polished and without punctures; metasomal tergites V–VII only weakly emarginate apically. Ovipositor short and upcurved, ovipositor sheaths about 0.2> as long as hind basitarsus.

Color. Head entirely black, with the exception of clypeus reddish-brown, mandible yellowish-red (except red teeth), maxillary and labial palps yellowish-white; scapus and pedicellus red, flagellum red with flagellar segments 5–9 whitish (seen from inner side). Mesosoma red (including scutellum and postscutellum), dorsal part of propleuron, anterior part of mesoscutum, metapleuron and propodeum somewhat darker; upper hind corner of propleuron, tegula and subalar prominence yellowish-white. Legs red, fore and middle coxae and all trochanters yellowish-red, hind femur slightly dark red on the apical half. Metasoma red, tergite II and III basally red, apically paler. Wings hyaline, veins and pterostigma yellowish.

Male. Unknown.

Etymology. The new species is named in honour of Franco Strumia, a renowned Italian expert of Chrysididae who collected the specimen, in recognition of his efforts in sampling the entomological fauna of Tuscany. Differential diagnosis. Misetus strumiai sp. nov. can be clearly distinguished by all the other species of the genus by having metasomal tergite II almost completely smooth and polished, slightly coriaceous only at the basal 0.1 and with few scattered punctures and clypeus with a small developed medial tooth. Other species of Misetus have metasomal tergite II longitudinally striate or wrinkled in the basal half, and usually more densely punctuate in the apical half, and clypeus with medial tooth strong and more developed (in M. hispanator relatively small but still clearly visible in frontal view).

In addition: postpetiole with median and lateral parts not differentiated and with few punctures medially (median and lateral parts usually separated, or if weakly differentiated—as in male of M. tyloidalis —then more markedly striate); antenna relatively short, with fewer than 25 segments; propodeum with area superomedia longer than wide (area superomedia as long as wide in male of M. nigritulus ); mesosoma, including scutellum, legs, including hind coxa, and metasoma entirely red (mesosoma in greater part black in other species; hind coxa redas in M. oculatus —or brown to black in other species; metasoma more or less brownish-black in other species, extensively red in some specimens of M. oculatus ).

Figures

FIGURES 5–8. M.strumiaisp. nov. (holotype). 5, habitus; 6, face; 7, propodeum;8, metasomal tergite II.