Taxonomic Studies of the genus Decticus Serville, 1831 from China (Orthoptera Tettigoniidae: Tettigoniinae), based on Morphology and Songs Author Liu, Fei College of Agriculture / Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resources Utilization, Xinjiang Uygur Autonomous Region, Shihezi University, Shihezi, Xinjiang 832003, China. Author Chen, Liusheng Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, Guangzhou, 510520, China. liucx@ioz.ac.cn Author Liu, Chunxiang Key Laboratory of the Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beichen West Road, Chaoyang District, Beijing 100101, China. liucx@ioz.ac.cn text Zootaxa 2020 2020-10-14 4860 4 563 576 journal article 8210 10.11646/zootaxa.4860.4.6 dc14c45b-38bb-45b5-b8bc-706866f7fb41 1175-5326 4414355 92E2564C-60AB-4759-AB06-F177CC6841DE Decticus verrucivorus crassus Götz, 1970 Decticus verrucivorus crassus Götz, 1970 . Zur Grössenvariation im Formenkreis Decticus verrucivorus ( Orthoptera, Saltatoria , Tettigoniidae ). Abh. Mus . Tierkd. Völkerkd., (A) Zool. (N.F.) 31:189. Diagnosis. Large-sized. Lateral lobe of pronotum about 1.2 times higher than wide. Tegmen with nearly straight and parallel anterior and posterior margins, with rounded apices ( Fig. 5d ). Redescription. Tegmen brown (or light green in a few specimens), with dark brown or black spots. Stridulatory file with about 69–72 widely-arranged pegs; pegs gradually becoming shorter from proximal two thirds part towards distal end ( Fig. 6h ). Male cercus branched in or near middle. Subgenital plate with a shallow obtuse-angle incision ( Fig. 4h & m ). Female subgenital plate with an approximately circular incision. Notes. Within this subspecies, morphological variation is large. Male tegmina slightly exceed the knees of hind femora or not. Male cerci are bifurcated in middle, or slightly near base or apex. According to length comparison between tegmen and ovipositor, females can be divided into three types . One type possesses long ovipositor, and tegmen reaching middle of ovipositor; The second type possesses long ovipositor, and tegmen reaching ovipositor apex; The third type possesses comparatively short ovipositor and tegmen reaching middle of ovipositor. The cause of the differences are not clear. Measurement (mm). See Table 6 and Table 7 . Song. Each chirp consists of five or six syllables with different amplitudes in different temperature ( Fig. 7 k–m). Compared with D. v. verrucivorus , the syllable number of chirp and the syllable’s structure and situation are different ( Fig. 7 f–o). The important parameters are listed ( Tab. 3 ). Material examined. See Table 1 and Table 2 . Distribution. The species is widely distributed in most parts of the Palaearctic Region ( Fontana et al. 2002 ; Willemse et al. 2018 ).