A review of the digger wasps (Insecta: Hymenoptera: Scoliidae) of Hong Kong, with description of one new species and a key to known species Author Taylor, Christopher E3E5CF0B-8C80-477E-8ED6-F78242F8D06F School of Animal Biology, University of Western Australia, Perth, Western Australia. pantopsalis@hotmail.com Author Barthélémy, Christophe 463D39B1-C65C-4DBD-AC9E-3C9F37878D76 Sai Kung, Hong Kong. chb99@netvigator.com text European Journal of Taxonomy 2021 2021-12-23 786 1 1 92 http://dx.doi.org/10.5852/ejt.2021.786.1607 journal article 2618 10.5852/ejt.2021.786.1607 a02b3cbf-cb04-4575-b4c9-227c422e6421 2118-9773 5817778 B9A13F3D-9383-4319-90B2-F59A66071601 Megacampsomeris formosensis chinensis Betrem, 1941 Figs 1A–B , 7C , 9D , 11C , 13D , 15C , 17D , 19C , 21D , 23C , 25D , 27C , 29D , 31C , 33D , 35C , 37D , 39D , 40D , 41D , 42D Campsomeris ( Megacampsomeris ) formosensis chinensis Betrem, 1941: 73–74 ( holotype HMS, ♀ , type locality = Zhenjiang, China ). Material examined CHINA – Hong Kong • 1 ♂ ; Mang Kung Wo ; 22°22′06″ N , 114°15′12″ E ; alt. 60 m ; 18 Oct. 2020 ; C. Barthélémy leg.; hand net , ref.: 0721.A.Hy.1 ; CBC • 1 ♀ ; same collection data as for preceding; 13–26 Sep. 2020 ; Malaise trap , ref.: M515.C.Hy.1 ; CBC . Description Female STANDARD RATIOS (n = 1). L: 17.1 mm ; CR: 1.15; OOR: 0.57; CLR: 0.47; MER: 1.21; OMR: 0.96; FRR: 1.86; MSR: 0.76; TER: 1.54. HEAD. Head densely punctate near lateral margins of clypeus, on frontal spatium and lower part of frons including ocular sinuses ( Fig. 15C ), impunctate in front of median ocellus, a row of large puncture in an arc behind lateral ocelli, median dorsal area of vertex impunctate, lateral and declivous area of vertex heavily punctate ( Fig. 19C ). MESOSOMA. Mesoscutum, with large punctures laterally and on frontal half (diameter of punctures larger than distance between them) and a large rectangular impunctate area in the centre ( Fig. 23C ); scutellum with a large impunctate area centrally, punctate laterally ( Fig. 27C ); metanotum punctate medially, impunctate laterally; dorsomedian area of propodeum heavily punctate (diameter of punctures larger than distance between them) ( Fig. 27C ). Mesopleuron and metapleuron minutely punctate on all surfaces (punctures so small that surfaces seem smooth); metapleuron with evanescent carina separating upper and lower panels. Scutellum and metanotum without median longitudinal carina ( Fig. 27C ). Dorsomedian area of propodeum without distinct tubercule medially ( Fig. 27C ). METASOMA. Metasoma with no division between anterior and ventral faces of S 2 in lateral view; tergites broadly punctate, denser punctures apically ( Figs 31C , 35C ); T2 with basal elevation (gradulus) distinct ( Fig. 35C ). WINGS. Fore wings with two submarginal cells and two recurrent veins, the second recurrent vein reaching the submarginal cell. Fore wing with a few short setae in the anterior part of the first submarginal cell. COLOUR AND VESTITURE. Integument entirely black ( Fig. 7C ), expect tegulae dark yellow ( Fig. 23C ) and T1 and T2 with evanescent yellow maculae on lateroapical sides ( Fig. 35C ). Vestiture light yellow/ orange, densely erect on dorsum of pronotum, posterior side of vertex and frons, long erect yellow/ orange setae on lateral sides of mesoscutum and median surface of metanotum, vestiture black on T5 and T6 ( Fig. 7C ). Wings mostly yellowish, with no maculae apically on fore wing, first marginal cell of fore wing bearing minute setae distally. Male STANDARD RATIOS (n = 1). Genitalia were dissected and total length not acquired; CR = 1.13; OOR = 2.0; CLR: 0.64; MER: 1.40; OMR: 1.0; FRR: 1.52; MSR: 0.79; TER: 1.42. HEAD. Head with clypeus impunctate on the medial basal part, bearing large spaced punctures above and near lateral margins, clypeus with long sparse pale setae ( Fig. 17D ); frontal spatium densely punctate, punctures separated by less than their diameter; frons moderately punctate, punctures separated by more than their diameter, impunctate on the area between hind ocelli and eyes ( Fig. 21D ); vertex heavily punctate, punctures separated by less than their diameter ( Fig. 21D ); frontal spatium well defined; frontal fissura absent. MESOSOMA. Dorsum of pronotum and mesoscutum bearing numerous small punctures separated by more than their diameter ( Fig. 25D ), becoming less dense posteriorly on mesoscutum; scutellum moderately punctate, becoming less dense posteriorly and towards lateral margins ( Fig. 25D ); metanotum with dense punctures ( Fig. 29D ); posterior margin of metanotum slightly raised medially ( Fig. 25D ); propodeum dorsomedian and dorsolateral areas densely punctate, punctures separated by less than their own diameter ( Fig. 29D ). Lateral panels of mesosoma, including mesopleuron and metapleuron with punctures mostly obscured by dense appressed pile. Scutellum and metanotum with evanescent median longitudinal carina ( Fig. 29D ). Dorso-median area of propodeum without distinct tubercule medially ( Fig. 29D ). METASOMA. Tergites moderately and uniformly punctate ( Figs 33D , 37D ). S1 with large punctures, except V-shaped area posteriorly. T2 with no basal elevation (gradulus) ( Fig. 37D ). WINGS. Same as female but, fore wing with numerous short setae in the anterior half COLOUR AND VESTITURE. Integument mostly black except the following yellow ( Figs 9D , 13D ): clypeus, basal part of scape, base of mandibles ( Fig. 17D ), scapulae, anterior part of tegula, small spots on posteriolateral area of mesoscutum and scutellum ( Fig. 25D ); anterior panels of coxae of fore legs, ventral part of fore, mid and hind femurs, ventral part of fore and mid tibiae; metasoma with broad apical yellow bands on T1–T4 ( Figs 33D , 37D ), and medially interrupted apical yellow bands on S2–S4 ( Fig. 33D ). Vestiture pale yellow on entire body except black on metasomal segments 5–7 ( Fig. 9D ); vestiture on metasoma mostly noticeably long and decumbent ( Fig. 37D ). Wings yellowish. GENITALIA. Ventral side of paramere bearing a few setae on inner margin ( Fig. 40D ), dorsal side with dense long setae on most of its surface ( Fig. 39D ); volsella and cuspis volsellaris with dense setae on entire surfaces ( Figs 40D , 42D ); volsella bearing numerous sensory cones on its external margin ( Fig. 42D ) and a lamella on its inner margin ( Fig. 39D ). External margin of paramere moderately angled medially and subrounded apically, serrated margin substraight, convex basally ( Fig. 42D ). Distribution ( Fig. 1A–B ) China ( Anhui , Fujian , * Hong Kong , Hubei, Hunan, Jiangsu, Zhejiang). [ Betrem 1928 , 1941 ; Wang 1992 ; Liu et al. 2021b ]. Notes This taxon was omitted from Osten’s (2005) list. It differs from the nominotypical subspecies in the metasomal vestiture which is uniformly reddish brown in Megacampsomeris formosensis formosensis Betrem, 1928 ( Betrem 1941 ) . Liu et al. (2021b) also noted potential differences between the subspecies in the relative lengths of the hind tarsomeres and in the pilosity of the spiracular angles, but felt that further research on their distinction was required.