Trichrysis formosana ( Mocsary , 1912)

Rosa, Paolo, Wei, Na-sen, Feng, Jun & Xu, Zai-fu, 2016, Revision of the genus Trichrysis Lichtenstein, 1876 from China, with description of three new species (Hymenoptera, Chrysididae), Deutsche Entomologische Zeitschrift 63 (1), pp. 109-136 : 114-116

Taxon classification Animalia Hymenoptera Chrysididae

Trichrysis formosana ( Mocsary, 1912) status revived Figs 19-24, 25-30

Chrysis (Trichrysis) formosana Mocsáry, 1912: 380. Lectotype, ♀, Taiwan: Takao [= Kaohsiung], designated by Bohart in Bohart and French 1986: 341; Taiwan: Takao [= Kaohsiung] (HNHM) (examined).

Chrysis (Trichrysis) sauteri Mocsáry, 1912: 381. Holotype, ♂, Taiwan: Takao [= Kaohsiung] (HNHM) (examined). Syn. n.

Chrysis (Trichrysis) formosana Mocsáry: Bischoff 1913: 45; Mocsáry 1913b: 614; Uchida 1927: 151; 1933: 3; Tsuneki 1970: 11.

Chrysis (Trichrysis) sauteri Mocsáry: Mocsáry 1913b: 614; 1913c: 289; Uchida 1927: 151; Tsuneki 1970: 13.

Chrysis (Trichrysis) taial Tsuneki, 1970: 11. Holotype, ♀, Taiwan: Nanton: Puli (OMNH, not NIAS). Syn. n.

Material examined.

CHINA: ♀, Formosa [= Taiwan] Sauter / Takao 1907 / formosana Mocs. det. Mocsáry typ. <handwritten in red> / red label / Lectotypus Chrysis formosana Mocs., ♀ RM Bohart <red label> / id nr. 135546 HNHM Hym. coll.; ♂, Formosa [= Taiwan] Sauter / Takao 1907 / Sauteri Mocs. det. Mocsáry typ. <handwritten in red> / red label / Holotypus Chrysis sauteri Mocs. ♂ RM Bohart / id nr. 135548 HNHM Hym. coll.; 2♀♀, Kankau (Koshun) Formosa [= Taiwan] H. Sauter / IX.1912 / 12.VII.1907 / Chrysis formosana Trautmann det.. PHILIPPINES: 1♀, South Leyte <without further data> (PRC); 1♀, Mt. Makiling Luzon Baker / Ins. Philipp. (HNHM).

Diagnosis.

Trichrysis formosana ( Mocsáry, 1912) is similar to Trichrysis luzonica ( Mocsáry, 1889). It can be easily separated from the latter by median bridge of pit row sharply depressed, leaving median tooth hook-like (Fig. 24), and TFC without branches.

Description.

Female. Body length 5.0-6.0 mm.

Head. Scapal basin punctate. TFC double, with lower one weakly developed. Relative length of P:F1:F2:F3=1.0:1.2:0.9:0.6; F1 l/w=2.2; OOL=1.5 MOD; BOL=1.5 MOD; POL=1.7 MOD; MS=0.9 MOD; clypeal apex medially truncated.

Mesosoma. Pronotal groove weak; sublateral carina distinct and complete (Fig. 21). Punctuation on pronotum, mesoscutum and mesoscutellum with consistent punctures subequally interspaced; interspaces punctate. Metanotum with large punctures, without interspaces. Episternal sulcus and scrobal sulcus with large transversal foveae (Fig. 19).

Metasoma. Punctures on T1 and T2 distinctly geminate; interspaces punctate laterally. T2 and T3 with weak median carinae. T3 prepit bulge medially convex; pit row distinct, with large, deep and round pits, close, but not fused (Fig. 23); median bridge of pit row sharply depressed, leaving apical tooth hook-like in lateral view (Fig. 24). Apex of T3 with three teeth similar in size; interval between median tooth and lateral tooth straight. S2 black spots small and round, fused medially.

Colouration. Body blue to bluish-green, with pair of symmetric blue spots on T1, T2 and T3, respectively. Tegula fully metallic blue to bluish-green. Legs metallic blue to bluish-green, with tarsi black or blackish-brown.

Male. Body length 4.5 mm (Fig. 25), more greenish. Different from female as follow: apex of T3 with teeth slightly shorter (Fig. 29); T3 without prepit bulge; pronotum, mesoscutum and mesoscutellum dark metallic blue or black; metasoma dark metallic blue to blackish dorsally (Figs 27, 28).

Distribution.

China (Taiwan); Philippines (new record).

Remarks.

The interpretation of Trichrysis formosana by different authors was sometimes erroneous ( Tsuneki 1970; Hanada 1989), and referable to other species. Kimsey and Bohart (1991) placed Trichrysis formosana in synonymy with Trichrysis triacantha . These two species are clearly distinguishable by: body colouration, blue to bluish-green, with contrasting blue area dorsally and greenish to golden-green strips laterally and posteriorly on T1, T2 and T3 (uniform blue in Trichrysis triacantha ); apex of T3 with straight interval between median tooth and lateral tooth (convex in Trichrysis triacantha ); and median bridge of pit row sharply depressed, leaving apical tooth hook-like (median bridge of pit row straight or slightly depressed in Trichrysis triacantha ). We here revalidate Trichrysis formosana ( Mocsáry, 1912) from the previous synonymy.

Trichrysis sauteri ( Mocsáry, 1912) was described on a male collected by Sauter in July 1907, together with the female type specimens of Trichrysis formosana at Taiwan (Formosa, Takao [currently Kaohsiung]); the two species share the same main diagnostic characteristic of median bridge of pit row depressed. Therefore, we here consider Trichrysis sauteri ( Mocsáry, 1912) as synonym of Trichrysis formosana ( Mocsáry, 1912).

Trichrysis taial Tsuneki, 1970 was synonymised by Kimsey and Bohart (1991) with Trichrysis luzonica based on median bridge of pit row sharply depressed, leaving apical tooth hook-like. However, this characteristic is valid for Trichrysis formosana and not for Trichrysis luzonica , therefore we consider Chrysis (Trichrysis) taial Tsuneki, 1970 as a synonym of Trichrysis formosana ( Mocsáry, 1912).