Campsomeriella (Campsomeriella) collaris quadrifasciata (Fabricius, 1798)

Pham, Phong Huy & van Achterberg, Cornelis, 2023, Taxonomic study of the tribe Campsomerini (Hymenoptera, Scoliidae) from northern Vietnam, with the description of a new species and a checklist of Vietnamese scoliid wasps, Deutsche Entomologische Zeitschrift 70 (2), pp. 369-385 : 369

Campsomeriella (Campsomeriella) collaris quadrifasciata (Fabricius, 1798)

Fig. 2D-F

Scolia quadrifasciata Fabricius, 1798: 231.

Campsomeris quadrifasciata Fabricius: Betrem 1928: 336.

Campsomeris (Campsomeriella) quadrifasciata Fabricius: Betrem 1941: 89.

Campsomeris (Campsomeriella) collaris quadrifasciata Fabricius: Betrem and Bradley 1964: 19.

Campsomeriella (Campsomeriella) collaris quadrifasciata Fabricius: Betrem 1967: 29.

Specimens examined.

Vietnam: Thai Binh: 13 ♀♀, Hong Minh, Hung Ha , 25.vi.2013, 10.vii.2017, Coll. Phong Huy Pham. Thanh Hoa: 1 ♀ + 2 ♂♂, Sam Son town, 22.vi.2016, 26-28.vii.2020, Coll. Phong Huy Pham ; 2♂, Hai Tien , Hoang Hoa, 1.vi.2022, Coll. Phong Huy Pham. Ha Noi: 1 ♀ + 1 ♂, Nghia Do, Cau Giay , 04.i.2016, 16.vii.2017, Coll. Phong Huy Pham ; 1 ♀ + 2 ♂♂, Red river bank, Long Bien , 13.ix.2015, Coll. Phong Huy Pham ; 1 ♀, Lien Mac, Bac Tu Liem , 19.viii. 2017, 22.x.2017, Coll. Phong Huy Pham ; 2 ♀♀, Van Hoa, Ba Vi , 8.i.2020, Coll. Phong Huy Pham ; 8 ♀♀ + 2 ♂♂, Co Nhue 2, Bac Tu Liem , 05.i.2016, 13.xii.2015, 21.xii.2022, Coll. Phong Huy Pham. Lang Son: 1 ♂, Huu Lien, Huu Lung , 13.vi.2018, Coll. Phong Huy Pham.

Diagnosis.

Female. Body length 14-22 mm. Vestiture black, except greyish-white on clypeus, front and antennal scape; occiput, dorsal surface of pronotum, scapula and anterior part of mesoscutum with dense, erect red-brown setae; wings dark brown, with light blue reflections (Fig. 2D ).

Male. Body length: 10-14 mm. S6 and S7 with copulatory brushes; metasoma with light blue reflections; broad stripe along lateral margin of clypeus, base of mandible, very narrow stripe on scapula posteriorly, very small spot on callosity, tegula anteriorly, small stripe on apical half of fore femur, outer surface of mid-femur apically, small spot on hind femur apically, outer surface of fore and mid-tibiae, large stripe on apical half of hind tibia and outer surface of first and fifth fore tarsal segments yellow; apical yellow bands on T1-T4, covering about one-half of T1, T2 and T4 and about one-third of T3 (Fig. 2E ); a pair of small yellow spots on S2 and S3 posterolaterally, sometimes on S4; erect vestiture white, except black on two last metasomal segments; wings lightly infumated; base of volsella covered with dense and long setae (Fig. 2F ).

Distribution.

Vietnam: Ha Noi, Lang Son, Thanh Hoa, Thai Binh (Fig. 8C ). Elsewhere: China, Indonesia, Malaysia, Myanmar, Thailand ( Betrem 1928, 1941; Gupta and Jonathan 2003).

Campsomeriella collaris (Fabricius) is a polytypic taxon that is widely distributed primarily in the Oriental region. The species consists of three subspecies, C. collaris collaris (Fabricius), C. collaris quadrifasciata (Fabricius) and C. collaris insularis Gupta & Jonathan, 2003 ( Osten 2005). These subspecies are distinguished, in females, by differences in the colour of the erect setae on the head and mesosoma and reflections on wings and in males, by the difference in yellow spots.

In northern Vietnam, C. collaris collaris (Fabricius) and C. collaris quadrifasciata (Fabricius) are the most common and recognised scoliid species because of the entirely black body in females, the dark brown wings and erect white or red-brown setae on the occiput, scapula and anterior part of the mesoscutum; and the very large yellow bands on T1-T3 in males of C. collaris collaris (Fabricius).

Campsomeriella collaris collaris was originally described from India by Fabricius (1775) as Tiphia collaris . Krombein (1979) stated that the subspecies occurs only in Sri Lanka and southern India. Gupta and Jonathan (2003) showed the subspecies being common and widely distributed in the Indian subregion and recorded it occurring in Nepal and Bangladesh. Betrem (1928) recorded only C. collaris quadrifasciata from northern and central Vietnam. Liu et al. (2021a, 2021b) recorded C. (C.) collaris from China without recognition of subspecies. Judging from the key characters and images, these specimens should be classified as C. (C.) Campsomeriella collaris Campsomeriella quadrifasciata . Taylor and Barthélémy (2021) recorded it from Hong Kong. In this present study, the first author found that populations collected at the same locality, for example, Thai Binh and Thanh Hoa, would key to both C. collaris collaris and C. collaris quadrifasciata . We hypothesise that C. collaris populations are variable in colour in India, Nepal, Bangladesh to Vietnam and China and that recognition of both subspecies is probably not warranted as indicated in Liu et al. (2021a, 2021b). Future research is needed to better understand the colour variation of this species in a larger geographical context.

Some small female specimens (14-15 mm body length) have dense greyish setae on the occiput, scapula and anterior part of the mesoscutum, suggesting that variation in the colour of setae on the body is at least partly related to overall size.

Khuat et al. (2013) recorded a scoliid as Campsomeris sp. from Ha Noi. The specimens (two females and two males collected at Bai Giua Song Hong, Long Bien district in 2012) would key to C. collaris quadrifasciata .

Figures

Figure 2. Campsomeriella (Campsomeriella) collaris collaris (Fabricius, 1775) and Campsomeriella (Campsomeriella) collaris quadrifasciata (Fabricius, 1798). A-C. C. (C.) collaris collaris; D-F. C. (C.) collaris quadrifasciata (A, D. Habitus, female, dorsal view; B, E. Habitus, male, dorsal view; C, F. Genitalia, ventral view).

Figure 8. Distribution of the Scoliid species from northern Vietnam. A. Campsomeriella (Annulimeris) annulata annulata (Fabricius, 1793); B. Campsomeriella (Campsomeriella) collaris collaris (Fabricius, 1775); C. Campsomeriella (Campsomeriella) collaris quadrifasciata (Fabricius, 1798); D. Megacampsomeris shillongensis (Betrem, 1928); E. Micromeriella marginella marginella (KIug, 1810); F. Phalerimeris phalerata phalerata (de Saussure, 1858); G. Sericocampsomeris flavomaculata Gupta and Jonathan, 1989; H. Sericocampsomeris rubromaculata rubromaculata (Smith, 1855); I. Sericocampsomeris vietnamica Pham & van Achterberg, sp. nov.