Megacampsomeris szetschwanensis Betrem, 1928
Campsomeris (Megacampsomeris) szetschwanensis Betrem, 1928: 140.
Campsomeris (Megacampsomeris) szetschwanensis var. Betrem, 1928: 140.
Campsomeris (Megacampsomeris) szetschwanensis Formas A-E. Betrem, 1941: 67.
Megacampsomeris. schulthessi schulthessi Betrem, 1928 = ?szetschwanensis Betrem, 1928: Osten 2005: 21.
Type material.— ♂ Holotype Campsomeris szetschwanensis Betrem, 1928; People’s Republic of China, Kwanhsien, Szetschwan prov., Stötzner Exp. (presently Kwanhsien, near Chengdu, Sichuan prov.) and a blue label with the number 65 (ETHZ, type label).
Other material.— Campsomeris szetschwanensis Betrem, 1928, “paratype”, blue label with number 58 but no locality label, 1♂ (ETHZ, cotype label); Campsomeris szetschwanensis Betrem, 1928 Forma A, (China) Kwanhsien, Szetschwan prov., Stötzner Exp. 1♂ (RMNH); Campsomeris szetschwanensis Betrem, 1928 Forma B. (China) Zõ-Pou, Chejiang prov., VI-32, 1 ♂ (RMNH).
Figs 7-8, Megacampsomeris from China, Kwanhsien. 7, Megacampsomeris szetschwanensis Betrem, 1928, holotype ♂, habitus; 8, M. szetschwanensis Forma A Betrem, ♂. (= M. szetschwanensis Betrem), propodeum and tergite 1 in lateral view (arrows indicate steeply sloping mid subhorizontal portion of propodeum); fig. 7 scale 1 cm, fig. 8 scale 1 mm.
Diagnosis.— The habitus is shown in fig. 7. This species can be recognised by the following combination of characters: Base of mandible and clypeus black, scrobes yellow. Head and mesosoma black. Metasoma black but tergites 1-4 and sternites 2-4 with yellow apical margins; apical three segments black and reddish-brown. Tibia I broadly yellow on outer side. Vestiture white but dark brown to black on apical three segments of metasoma. Hind tibial spurs white. Sternite 3 basally smooth and without a gradulus. Propodeum in dorsal view with a rather narrow, strongly sloping, mid subhorizontal portion, anterior width about three times median length, that merges with vertical portion. In lateral view subhorizontal portion slopes rather steeply and makes a more obtuse angle with vertical portion (fig. 8). M. szetschwanensis Forma C also has a largely black clypeus but propodeum in dorsal view with a longer mid subhorizontal portion, anterior width about 1.8 times median length, that is less sloping and makes a more or less straight angle with the vertical portion. In lateral view the subhorizontal portion slopes more gradually and makes a somewhat sharper angle with vertical portion (fig. 9).
Redescription holotype.— Length of body: 20 mm. Base of mandibles black, clypeus black. Scrobes yellow. Thorax black but upper half of callosities reddish-yellow, tegulae and posterior corners of pronotum yellowish. Apex of femora with yellow spot, upper side of tibia 1 broadly yellow, metatarsus and fifth tarsal segment reddish-yellow. Metasoma black with narrow apical yellow margins on tergites 1-4, apical margin of tergite 1 narrowly reddish-yellow along posterior margin of tergite. Sternites 2-4 with narrow yellow apical margins, somewhat interrupted medially by reddish-yellow area. Tergite and sternite 5 with a very narrow reddish-yellow apical margin. Apical three segments largely reddish-brown. Vestiture white but brown to black on apical three segments of metasoma. Antenna black, reaching almost posterior margin of tergite 1. Length of apical segment about three times maximum width. Wings yellowish-hyaline. Combined length of the maxillary palp about two-thirds of the length of the hypostoma.
Head.— Spatium frontale densely punctate but impunctate around frontal pit. Fissura frontalis visible up to frontal pit. Frons well separated from spatium frontale by impressed impunctate line, weakly angulated medially. Frons below anterior ocellus largely impunctate, laterally rather densely but irregularly punctate with smaller and larger punctures. In frontal view, posterior ocelli and area in between distinctly raised above level of eye lobes.
Mesosoma.— Dorsal and vertical portion of pronotum densely punctate. Narrow area behind callosities with dispersed small punctures. Dorsal portion of upper plate of metapleuron rather densely punctate, vertical portion with more dispersed punctures and lower inner corner impunctate. Lower plate with dispersed punctures but upper one-third impunctate. Carina lateralis abbreviated, not reaching level of spiraculum. Spiracular angles and areas punctate. Lateral vertical portion of propodeum rather slender, densely punctate along upper margin and gradually more dispersed punctate downwards. Mesoscutum punctate at interspaces smaller or about equal to puncture diameter but medially with larger impunctate interspaces. Scutellum with upper portion rather densely to densely punctate, central portion less densely punctate and broadly impunctate along posterior margin. Metanotum very densely punctate but with a narrow impunctate vertical stripe. Propodeum in dorsal and lateral view as described in the diagnosis.
Metasoma.— Tergite 1 broad elongate, posterior width about twice median length of horizontal portion, transition from dorsal to anterior vertical portion gradual. Sternite 1, median length about 1.2 times posterior width, densely punctate but narrow mid line and above posterior margin impunctate. Sternite 2 with tubercle on transition from ventral to vertical portion. Outline of paramere given in Betrem (1928) plate 2 fig. 42.
M. szetschwanensis Forma A (= M. szetschwanensis Betrem, 1928) has the same structure as the holotype but upper half of callosities yellow, femur I with a short apical yellow stripe on the lower part; metatarsus I and the fifth tarsal segment yellow; tibia 2 with a short yellow stripe at the basis on upper side. Tergite and sternite 5 without reddish-yellow coloration. Length: 21 mm.