Contribution to the knowledge of Chinese Gryllacrididae (Orthoptera) XIX: New supplements to the genus Apterolarnaca Gorochov, 2004 Author Zhang, Qianwen 0000-0001-6856-840X Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541006, China. & Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin 541006, China. & Zhangqianwen 33 @ 163. com; https: // orcid. org / 0000 - 0001 - 6856 - 840 X Author Luo, Yehong Guangxi Huaping National Nature Reserve Management Office, Guilin 541000, Guangxi, China; Author Bian, Xun Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541006, China. & Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin 541006, China. text Zootaxa 2023 2023-09-13 5343 6 501 520 https://www.mapress.com/zt/article/download/zootaxa.5343.6.1/51846 journal article 10.11646/zootaxa.5343.6.1 1175-5326 8345886 E526459C-094A-4CA7-AE1B-3DF44F64C09E Apterolarnaca ( Bianigryllacris ) quadratus (Li & Liu, 2015) ẀKflüdzḋă Figures 10–11 Description. Male (new description). Body medium. Fastigium verticis wider than scape. Face smooth with scattered impressed dots ( Fig. 11A ). Ocelli indistinct. Pronotum with anterior margin slightly projecting, posterior margin almost truncate ( Fig. 11B ); lateral lobes longer than high ( Fig. 11C ). Fore coxae swollen with 1 spine ( Fig. 11C ). Fore and middle femora unarmed on ventral surfaces, left hind femora with 6–10 internal and 4–8 external spines on ventral surface. Fore and middle tibiae ventrally with 4 pairs of spurs and 1 pair of apical spurs; middle tibiae with1 internal spine on dorsal surface. Hind tibiae with 3–6 internal and 4–7 external spines on dorsal surface, apices with 1 pair of dorsal spurs and 2 pairs of ventral spurs. Second and third abdominal tergites each with two rows of stridulatory pegs ( Fig. 11D ). FIGURE 10. Apterolarnaca ( Bianigryllacris ) quadratus (Li & Liu, 2015) . Female housed in the National Animal Collection Resource Center (http://museum.ioz.ac.cn): A–D. habitus: A. dorsal view, B. dorsal and lateral view, C. lateral view, D. ventral view; E. subgenital plate in ventral view. FIGURE 11. Apterolarnaca ( Bianigryllacris ) quadratus (Li & Liu, 2015) . Male: A. head in frontal view; B–C. head and pronotum: B. dorsal view, C. lateral view; D. second and third abdominal tergites with stridulatory pegs in lateral view; E. right hind femur in lateral and ventral view; F–H. apex of abdomen: F. dorsal view, G. lateral view, H. ventral view, I. ventro-apical view. Posterior margin of eighth abdominal tergite arched ( Fig. 11F ). Posterior margin of ninth abdominal tergite furrowed along the middle, posterior margin triangularly concave in dorsal view ( Fig. 11F ), the lateral lobes prolonged into a spine which directing downward and slightly incurved ( Fig. 11G–H ). Tenth abdominal tergite interrupted in the middle. Cerci short, conical, its apices obtuse. Subgenital plate transverse, posterior margin triangularly concave the lateral loves with swollen basal area and digitate apical area, its tip directing inwards ( Fig. 11H ). Coloration. The body color is very similar to holotype . Material examined. 1 male , Anjiangping , Lingui , Guangxi , July 10, coll. by Xiangyi Lu , Siyu Pang and Huan Meng ; 1 male , Anjiangping , Lingui , Guangxi , July 13, coll. by Xiangyi Lu , Siyu Pang and Huan Meng ; 2 males , Anjiangping , Lingui , Guangxi , August 3, 2022 , coll. by Siyu Pang , Pinying Rong and Huan Meng . Measurements (mm). Male: BL 19.2–20.8, PL 4.2–4.9, HFL 10.9–12.3. Distribution. Guangxi (Lingui, Xing’an). Discussion. Based on the color patterns these specimens from Anjiangping, Lingui, Guangxi are very similar to Apterolarnaca ( Bianigryllacris ) quadratus (Li & Liu, 2015) . Here we treated them as the male sex of the latter. The male is very similar to Apterolarnaca ( Bianigryllacris ) nigrigeniculatus (Liu & Yin, 2002) , but differs from the latter by the posterior margin of tenth abdominal tergite widely separated from each other, and the pronotum has wider black margins; external margins of hind femora with black stripe.