Dinetus (s. str.) pictus ( Fabricius, 1793 )

Jacobs, Hans-Joachim, 2021, A review of Dinetus Panzer, 1806 with descriptions of five new species and keys to world species (Hymenoptera, Crabronidae), Zootaxa 5061 (1), pp. 69-94 : 75-76

Dinetus (s. str.) pictus ( Fabricius, 1793)

( Figs 1, 3, 5, 7 , 17 , 45–48 )

Sphex guttatus Fabricius, 1793: 215 , sex not indicated (as guttata, incorrect original termination), junior primary homonym of Sphex guttatus Gmelin, 1790 . Lectotype: ♀, Italy: no specific locality (ZMUC), designated by van der Vecht (1961: 25).

Crabro pictus Fabricius, 1793: 299 , sex not indicated. Holotype: ♂, Germany: Halae Saxonum, now Sachsen-Anhalt: Halle (ZMKUC). Synonymized with Dinetus guttatus by Panzer (1806: 192) and used as valid name.

Crabro ceraunius Rossi, 1794: 123 , sex not indicated. Holotype or syntypes: Italy: Etruria, now Toscana: no specific locality (lost). Synonymized with Dinetus pictus by Lepeletier de Saint Fargeau (1845: 235).

Description female. Dorsal and lateral view: figs 45, 46.

Colour. Black with ivory and black markings. Head black with narrow ivory spots in the upper part of gena. Mandible yellow with black apex. Antenna black. Pronotum black, anterior margin ivory, posterior with two ivory spots. Pronotal lobe black with ivory. Tegula ivory. Scutum black. Scutellum and postscutellum black with ivory spots. Mesopleuron black with little ivory spot below the pronotal lobe. Mesopleuron and propodeum black. Terga I‒II of metasoma red with ivory spots posterior (sometimes reduced on I), tergum II red with big ivory spots posterior, terga III‒IV black with ivory spots, V black with broad apical part, VI ivory with red apex. Coxae and trochanters of all legs black. Fore and mid femora black with big ivory apical spot below. Hind femur black. Tibiae of all legs yellow or ivory on the upper side, black below. Fore and middle tarsi brownish, hind tarsus darkened.

Morphology. Anterior margin of clypeus with two long teeth (fig. 7). Head and thorax densely punctured, distances between the points smaller than point diameters. Lateral parts of propodeum with regular longitudinal ridges. Propodeal enclosure with oblique striae and reticulated or granulated structure (fig. 17). Head and thorax covered with short appressed setae. Face with silver pubescence. Propodeal enclosure limited by denser appressed silver pubescence. Fore tarsal rake with long broadened spines (fig. 5). Outer vein of subdiscoidal cell (cu) vertical, parallel with the nervulus (cu-a) (fig. 1). Body length 6‒7 mm.

Description male. Dorsal and lateral view: figs 47, 48.

Colour. Head yellow with black vertex, occiput and spots on the face near the scape. Mandible yellow with brown apex. Pronotum black with yellow front and hind margin. Tegula yellow. Scutum black, scutellum and postscutellum yellow. Mesopleuron black with yellow spot below the pronotal lobe. Propodeum black. Metasomal terga I‒III red with broad yellow bands, IV‒V black with yellow apical spots or band, VI red with yellow, VII reddish. Fore leg yellow with black spots on coxa and trochanter, underside of the tarsus brown. Mid legs: coxa black, trochanter black with yellow spot, femur yellow with black apical spot on the underside, tibia and tarsus yellow. Hind legs: coxa and trochanter black, femur black with yellow base, tibia and tarsus yellow.

Morphology. Sculpture of the integument similar to female but stronger. Antennomeres 5‒11 excavated on the underside, 12‒13 long and slender (12 about 3× as long as broad, 13 about 5‒6×) (fig. 3). Anterior margin of clypeus with two blunt teeth. Fore legs: tarsal rake with long and distinctly broadened spines, femur broadened and with sharp edge on the underside. Middle basitarsus slightly arched. Pubescence like in female. Body length 5‒6 mm.

Distribution. Europe except northern and northeastern parts (see Barbier 2017); Turkey ( de Beaumont 1969), Syria ( Murai & Amr 2011), Kazakhstan ( Kazenas 2002), Russia: European part, Western Siberia (Altai) ( Nemkov 2017, Danilov 2008).

Examined material. 90 ♂♂ 106 ♀♀ from Albania, Bulgaria, Czech Republic, Germany, France, Hungary, Italy, Portugal, Slovakia, Spain, Turkey, Kazakhstan ( CSE, JAC, OLML) .

Figures

FIGURES 1–9. 1–2 fore wing: 1. D. pictus, 2. D. pulawskii. 3–4 antenna: 3 D. pictus ♂, 4 D. simplicipes ♂. 5–6 fore basitarsus: 5 D. pictus ♀, 6 D. simplicipes ♀. 7 clypeus front margin D. pictus ♀, 8 fore trochanter D. dentipes, 9–11 scutum: 9 D. schmideggeri sp. nov. holotype ♂, 10 D. simplicipes ♀, 11 D. venustus ♀, 12 propodeal enclosure D. deserticus sp. nov. ♀ (1–8 after de Beaumont 1960, 9–12 phot. Jacobs)

FIGURES 13–18. Propodeal enclosure: 13 D. cereolus ♀, 14 D. schmideggeri holotype ♂, 15 D. nabataeus ♀, 16 D. pulawskii ♂, 17 D. pictus ♀, 18 D. simplicipes ♀. (phot. Jacobs)

FIGURES 43–50. View dorsal and lateral: 43–44 D. cereolus ♀, 45–46 D. pictus ♀, 47–48 D. pictus ♂, 49 D. simplicipes ♀, 50 D. simplicipes ♂. (phot. Jacobs) (scale bar 1 mm)