Allacta bruna, He, Jia-Jun, Zheng, Yu-Hong, Qiu, Lu, Che, Yan-Li & Wang, Zong-Qing, 2019

He, Jia-Jun, Zheng, Yu-Hong, Qiu, Lu, Che, Yan-Li & Wang, Zong-Qing, 2019, Two new species and a new combination of Allacta (Blattodea, Ectobiidae, Pseudophyllodromiinae) from China, with notes on their behavior in nature, ZooKeys 836, pp. 1-14 : 4

Allacta bruna sp. n. Figs 1-12, 46

Type material.

Holotype: male, CHINA, Hainan Province, Jianfengling, Mingfenggu, 960 m, 26-V-2014, Shun-Hua Gui, Xin-Ran Li et Jian-Yue Qiu leg. Paratypes: CHINA, Hainan Province: 1 male, same data as holotype; 1 male, Limushan, 678-694 m, 17-IV-2015, Xin-Ran Li et Zhi-Wei Qiu leg.; 2 females, Jianfengling, Mingfenggu, 26-IV-2015, Lu Qiu et Qi-Kun Bai leg.; 1 female, Diaoluoshan, 17-IV-2015, Lu Qiu et Qi-Kun Bai leg. (all in SWU).

Diagnosis.

This species can be easily distinguished from its congeners by the brownish body that lacks any markings.

Measurements (mm).

Male, pronotum: length × width 4.5 × 6.8, tegmina length: 15.5, overall length: 18.9-19.2; female, pronotum: length × width 4.7 × 6.7-6.8, tegmina length: 14.1-14.3, overall length: 18.1-18.3.

Description.

Male. Body brown to dark brown (Figs 1, 2). Head brown. Ocelli spots white. Antennae yellowish brown. Frons brown and clypeus pale brown. Maxillary palpi pale yellowish brown (Fig. 2). Pronotal disc dark brown, and two lateral borders yellowish brown (Figs 1, 4). Tegmina, wings, and legs brown (Figs 1, 2). Abdomen pale yellowish brown. Cerci black brown (Fig. 2).

Vertex with interocular space about half the distance between antennal sockets (Fig. 3). The third, fourth and fifth maxillary palpi of approximately same length (Fig. 5). Pronotum nearly trapezoidal, broader than long, maximum width behind the middle, the front and hind margins nearly straight, and the postero-lateral angle blunt and round (Fig. 4). Tegmina and wings fully developed, both extending beyond the end of abdomen. Tegmina with M and CuA longitudinal (Fig. 7). Hind wings with M straight and simple; CuA slightly curved with 4 branches (Fig. 8). Anteroventral margin of front femur type B2 (Fig. 6). Pulvilli only present on the fourth tarsomere. Tarsal claws symmetrical and unspecialized, arolium present. The first tarsus of the front legs about equal in length to the sum of the other four, but obviously longer in the middle and hind legs.

Female similar to the male. The coloration of living individuals dark brown, dried specimens much lighter, especially in the legs. Margins of pronotum and tegmina subtransparent in the specimens.

Male abdomen and genitalia. Abdominal terga unspecialized. Supra-anal plate nearly triangular, and the hind margin obviously concave. Paraprocts simple (Fig. 9). Subgenital plate nearly symmetrical, the middle part of the hind margin has a V-shaped concavity; styli similar, short cylindrical, with small spines, and interstylar margin with two lobes (Fig. 11). Left phallomere complex, inverted Y-shaped (Fig. 10). Median phallomere stem club-like, apex shoe-shaped, base with a small spine, the accessory structure curved, apex brush-shaped (Fig. 11). Hook on the right side (Fig. 12).

Remarks.

It can be distinguished from the other species in the group by the tegmina that without any light-colored bar in the anal field.

Etymology.

From the Latin word brunus referring to the body color being brown without any special markings.

Distribution.

China (Hainan).