Oxybelus latifrons Kohl, 1892

Mokrousov, M. V., Proshchalykin, M. Yu., Aliyev, Kh. A. & Maharramov, M. M., 2019, To the knowledge of digger wasps (Hymenoptera: Crabronidae) of Nakhchivan Autonomous Republic of Azerbaijan, Far Eastern Entomologist 394, pp. 1-24 : 3-5

Oxybelus latifrons Kohl, 1892

Oxybelus latifrons Kohl, 1892: 209 , ♀ (holotype: ♀, Azerbaijan, Araxesthal (= Arax valley) [ Naturhistorisches Museum , Wien, Austria]; examined).

ADDITIONAL MATERIAL. Azerbaijan: Nakhchivan Autonomous Republic, Babek,

Sirab, 39°18'N 45°31'E, 1090 m, 10.VI 2019, 1 ♀, 3 ♂ (M.Yu. Proshchalykin, Kh.A. Aliyev,

M.M. Maharramov).

NOTES. This little known species was described from the single female collected in

Azerbaijan by H. Leder and was not included to the keys (Verhoeff, 1948; Faester, 1949;

Móczár, 1958; Pulawski, 1978). Therefore, we consider it necessary to give illustrations, a brief redescription and a differential diagnosis of this species. Description of male is given for the first time.

DESCRIPTION. Female (Fig. 1). Total body length 6.9 mm. Black; mandible yellow and reddish with black apex; antenna mostly reddish with more light apex; pronotum with small yellow spots on humeral tubercles only; metanotal squama and mucron transparent with whitish pattern; tibiae and tarsi light yellow, tibiae partly reddish with darkened in the inner side;

femora black, yellow at apex only, without yellow spot below; tegula and vein bases whitish,

tegula without dark spots; tergae I–IV with tranverse yellowish lateral spots, tergite V with two close spots; apical margin of terga I–V discolored with reddish tint; apical segment reddish.

Figs 1–8. Oxybelus latifrons Kohl (1, 2, 4–7) and O. haemorrhoidalis Olivier (3, 8). 1–5 –

females; 6–8 – males; 1, 6 – habitus, lateral view; 2, 3, 7, 8 – head, frontal view; 4 – meso- and metanotum, propodeum, dorsal view; 5 – acetabular carinae, ventral view. Scale bar: 1 mm.

Frons wide, minimal distance between eyes about 0.63 of head height (Fig. 2). Frons between ocelli with not dense punctuation with shine interspaces. Omaulus and acetabular carina raised and sharp; acetabular carina with deep notch in the middle (Fig. 5). Metanotal squama bifid. Mucron slightly expanding with truncate apex (Fig. 4). Sternum II with large shiny interspaces, especially in medial half, punctures small. Pubescence erect on vertex and semierect on mesonotum, with a yellowish tint; on the rest of the head and thorax with appressed silvery setae.

Male (Fig. 6). Total body length 6.2 mm. Black; mandible yellow with black apex; antenna mostly brown with more light apex; pronotum with yellow spots on humeral tubercles only;

metanotal squama and mucron transparent with yellowish pattern, at one sample metanotum yellow laterally; fore and mid tibiae yellow with darkened in the inner side; hind tibia brown with yellow base and stripe; tarsi reddish yellow, femora black, yellow at apex, mid femur with deformed yellow spot at apex; tegula and vein bases whitish, tegula without dark spots;

tergae I–II with tranverse yellouwish lateral spots; apical margin of terga I–VI discolored with reddish tint; apical segment reddish.

Omaulus and acetabular carina raised and sharp; acetabular carina with deep notch in the middle, slightly narrower than female.

Frons narrower than female, minimal distance between eyes about 0.5 of head height

(Fig. 2). Frons between ocelli with not dense punctuation with shine interspaces.

Metanotal squama bifid. Mucron slightly expanding with truncate or slightly rounded apex. Sternum II with large shiny interspaces, punctures small but more numerous than female. Pubescence silvery, erect on vertex, semierect or appressed on the rest of the head and thorax, less developed than female.

COMPARISON. Differs from all known Palaearctic species of the genus by deep notch in the middle of the acetabular carina (Fig. 5). In morphology and coloration (red apical tergum) is closest to O. haemorrhoidalis Olivier , O. quatuordecimnotatus Jurine and O.

variegatus Wesmael from which differs by wider front (Fig. 2 vs Fig. 3 and Fig. 7 vs Fig. 8),

sparse punctures between posterior ocelli, and from O. quatuordecimnotatus Jurine also by sparse punctures on metasomal sternum II.

DISTRIBUTION. Azerbaijan. – Turkey.