Primeuchroeus crassiceps (Tsuneki, 1970)

Wei, Na-sen, Rosa, Paolo & Xu, Zai-fu, 2014, Contributions to the knowledge of the Chinese Primeuchroeus Linsenmaier, 1968 (Hymenoptera, Chrysididae), with a key to species, ZooKeys 373, pp. 43-56 : 45-47

Primeuchroeus crassiceps (Tsuneki, 1970) Figs 1-18

Chrysis crassiceps Tsuneki 1970: 8.

Primeuchroeus crassiceps (Tsuneki, 1970): Bohart 1988: 23; Kimsey and Bohart 1991: 541.

Materials.

1♀ (SCAU), Yunnan, Gaoligongshan National Nature Reserve (24°49'N, 98°46'E), 20-21.VII.2006, Jie Zeng, Juan-juan Ma & Bin Xiao leg., No. CP0038; 4♀♀+2♂♂ (SCAU), Yunnan, Gaoligongshan National Nature Reserve, Mailongxia (25°50'23"N, 98°51'23"E), 17.VIII.2005, Kai Wu leg., No. CP0039-0044.

Description.

Described after a female from Yunnan. Body length 4.3 mm (Figs 1, 2). Forewing length 3.1 mm. MS = 0.7 MOD. F-I 2.0 × as long as wide.

Head. Scapal basin deep and impunctate, with transverse striae and a round pit anteromedially (Fig. 3). F-I slightly longer than F-II (Fig. 3). TFC absent (Fig. 3).

Mesosoma. Pronotum with anterior declivity polished and impunctate between the two pits (Fig. 4); with an obtuse angle on each lateral margin (Fig. 4), with sublateral carina complete and lateral depression shallow (Fig. 6). Mesonotum with areolate punctures (Fig. 4). Mesopleuron without enlarged foveae along episternal sulcus (Fig. 6), without carina and projection (Fig. 6). Forewing with discoidal cell faint outwardly (Fig. 5); Rs short, 0.6 times as long as stigma, and ending obtusely (Fig. 5). Propodeal angle sharp and pointing backwards (Fig. 4).

Metasoma. T-I with sparser and considerably larger punctures than those on T-II and T-III (Fig. 7). S-II spots separated by 1.7 MOD (Fig. 8). T-III slightly bulging before pit row (Fig. 9); apex of T-III round, without transparent rim (Fig. 7); lateral margin of T-III nearly straight, without tooth (Fig. 9).

Colouration. Head and mesosoma metallic green, blackish along notauli. Mandible brown, with metallic green basally. Antenna black, with scape, pedicel and basal F-I metallic bluish-green. Tegula metallic bluish-green. Leg metallic bluish-green, with inner surface of tibia and tarsus brown. Metasoma metallic blue, with T-I metallic greenish-blue.

Male. Body length 4.3 mm (Figs 10, 11). Forewing length 3.1 mm. MS = 0.7 MOD. F-I 2.0 × as long as wide. Subantennal space = 0.8 MOD. Differing from female as follows: vertex, mesosoma, T-I and T-II darker than those of female; forewing with discoidal cell more distinct than that of female (Fig. 14); apex of T-III rounder than that of female, without angle medially (Fig. 16).

Variation. Females (n = 5). Body length 3.5-4.4 mm. Forewing length 3.0-3.4 mm. Rs 0.5-0.6 times as long as stigma. Metasoma with purple tints; F-I subequal to F-II. Males (n = 2). Body length 3.5-4.3 mm. Forewing length 3.0-3.1 mm.

Diagnosis.

F-I slightly longer than F-II. TFC absent. Pronotum with an obtuse angle on each lateral margin. Forewing with Rs short, 0.6 times as long as stigma, ending obtusely. Lateral margin of T-III nearly straight, without tooth.

Distribution.

China (Taiwan, Yunnan).

Biology.

Unknown. Collected in July and August.

Remark.

According to Bohart (1988), Primeuchroeus crassiceps belongs to the siamensis species-group.