Centrobia foersteri Kryger, 1919: 291. Type locality: Fortunens Indelukke, Dyrehaven (Jaegersborg Dyrehave, Zealand Island), Hovedstaden, Denmark.

Ufens hirticornis (Blood, 1923): 254. Type locality: Brockley Combe.

Ufens foersteri irregularis Nowicki, 1935: 572. Type locality: Bohemia.

Ufens foersteri meridionalis Nowicki, 1935: 572. Type locality: Southern part of Central and Southern Europe.

Ufensia minuta Viggiani, 1988: 15–21.

Ufensia xinjiangiensis Hu & Lin, 2003: 309–311. Type locality: Xinjiang, China. syn.nov.

Type material examined. Holotype of Ufensia xinjiangiensis (Biological Control Research Institute, Fujian Agricultural and Forestry University) on slide labeled: “ Ufensia xinjiangiensis, ♀, Holotype, China, Xinjiang,Wusu, 17 July 2001, Hong-Ying Hu, in Chinese and English ”. Paratypes. China, Xinjiang: 1♀, 1♂, Wusu, 17 July 2001, Hong-Ying Hu. 4♂, Yanqi, 7 August 2001, Hong-Ying Hu. 5♀, 5♂, Urumqi, 1 August 2001, Hong-Ying Hu, Tao Sun. 4♀, 3♂, Bohu, 7 August 2001, Hong-Ying Hu.

Material examined. China, Xinjiang: 2♀, 4♂, Fuhai, 3 August 2007, Bing Du, Tie-Gang Zhang. 6♀, 8♂, Fuyun, 6 August 2007, Ya-Huang Luo, Jian-Hua Xu. 8♀, 6♂, Habahe, 3 August 2007, Jian-Hua Xu, Xi He. 2♀, 6♂, Kelamayi, 24 July 2008, Jia-Xiong Lu. 2♀, Kuche, 16 July 2008, Zhi-Qiang Zhang. 2♀, Bachu, 21 July 2008, Zhi-Qiang Zhang. 6♂, Atushi, 22 July 2008, Zhi-Qiang Zhang. 4♂, Keping, 23 July 2008, Zhi-Qiang Zhang. 5♂, Luntai, 24 July 2008, Zhi-Qiang Zhang.

Host. Reuteria marqueti Puton (Hemiptera: Miridae) (Viggiani 1988).

Distribution. China (Xinjiang), Thailand, Pakistan, Iran, Israel, Turkmenistan, Ukraine, Kirgizia, Russia (Moscow oblast), United Kingdom (England), Denmark, Poland, Greece, Netherlands, France, Germany, Italy (Sardinia), Spain, Czech Republic, Romania, Hungary, Turkey, Ghana, Egypt, Guinea, Kenya, Madagascar, Morocco, Nigeria, South Africa, Tanzania, Uganda, Australia (Queensland, Western Ausralia).

Comments. Ufens foersteri is very common in Xinjiang, with broad distribution in different habitats such as deserts, agricultural fields, grassland, etc. Its unique male genitalia make it easy to distinguish from other species of Ufens. Hu and Lin (2003) described Ufensia xinjiangensis, which we think is same as U. foersteri based on the study of the type material of the former and the redescription of the latter by Owen (2011), hence U. xinjiangensis is synonymized under the later.

Funding This work was supported by the National Natural Science Foundation of China (U1170305, 30560019).

Ackownlegements We are very grateful to Dr. Serguei V. Triapitsyn (California University, Riverside, USA) for reviewing the manuscript and sending us the photos of paratype of Ufens pallidus Owen.