Cavariella Del Guercio (Hemiptera, Aphidinae, Macrosiphini) in China, with a new species, new synonymies, and first country records Author Xu, Ying https://orcid.org/0000-0002-8950-7718 Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, No. 1 - 5 Beichen West Road, Chaoyang District, Beijing 100101, China & College of Life Science, University of Chinese Academy of Sciences, No. 19, Yuquan Road, Shijingshan District, Beijing 100049, China Author Chen, Jing https://orcid.org/0000-0002-7584-5249 Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, No. 1 - 5 Beichen West Road, Chaoyang District, Beijing 100101, China Author Jiang, Li-Yun https://orcid.org/0000-0002-2527-9613 Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, No. 1 - 5 Beichen West Road, Chaoyang District, Beijing 100101, China Author Qiao, Ge-Xia https://orcid.org/0000-0002-7300-6812 Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, No. 1 - 5 Beichen West Road, Chaoyang District, Beijing 100101, China & College of Life Science, University of Chinese Academy of Sciences, No. 19, Yuquan Road, Shijingshan District, Beijing 100049, China qiaogx@ioz.ac.cn text ZooKeys 2023 2023-07-18 1169 235 292 http://dx.doi.org/10.3897/zookeys.1169.98552 journal article http://dx.doi.org/10.3897/zookeys.1169.98552 1313-2970-1169-235 2071042F21934F9B9E1022CDF27804AD DE97B238347A560A83FB2B2A4F1E9920 Cavariella pustula Essig, 1937 Figs 22 , 35C Cavariella pustula Essig, 1937: 46. Specimens examined. Two ap. viv. fems. and two ala. viv. fems. (slides), one ap. viv. fem. (COI: OP956142 ), China : Beijing , 17.V.2021 , No. 50011, on Salix , coll. G.X. Qiao and Y. Xu. Diagnosis. ABD TERG VIII with hooded supra-caudal completely hiding the cauda from above (Fig. 22H ); PT 0.55-0.91 x Ant. VIb; URS wedge-shaped (Fig. 22D ), 0.94-1.36 x HT II; cauda conical and constricted basally, blunt at apex (Fig. 22I ), the length 1.45-1.49 x basal width ( Essig 1937 ). Figure 22. Cavariella pustula Essig. Apterous viviparous female: A dorsal view of body B dorsal view of head C antenna D ultimate rostral segment E sculptures of abdomen F abdominal tergites V-VIII G siphunculus H supra-caudal process on abdominal tergite VIII I cauda. Alate viviparous female: J dorsal view of body K antenna L siphunculus M supra-caudal process on abdominal tergite VIII N cauda O genital plate. Scale bars: 0.10 mm. Comment. The species is first recorded in China and with some variations in China as follows: Ant. III and IV each with 22, 5 circular secondary rhinaria in alatae, but in USA, Ant. III each with 5-9 circular secondary rhinaria arranged in a row in alatae, and Ant IV without secondary rhinaria ( Essig 1937 ). The species resembles Cavariella aspidaphoides in ABD TERG VIII hooded supra-caudal process; dorsum of body with circular sculptures; but differs from C. aspidaphoides as follows: supra-caudal process only with two setae distally ( C. aspidaphoides : supra-caudal process with two setae distally and 3-5 short setae marginally); URS with one pair of accessory setae ( C. aspidaphoides : URS without accessory setae); PT shorter than Ant. VIb ( C. aspidaphoides : PT longer than Ant. VIb). Biology. The species feeds on tender tips of Salix (Fig. 35C ). Distribution. China (Beijing), Canada, USA.