Parasitoids reared from galls of Stefaniola sp. (Diptera, Cecidomyiidae) on Haloxylon spp. in China, with redescription of Mesopolobus quadrimaculatus Dzhanokmen (Chalcidoidea, Pteromalidae)

Abstract

Mesopolobus quadrimaculatus Dzhanokmen (Hymenoptera: Pteromalidae) is recorded for the first time from China andoutside of Kazakhstan. It was reared from galls of Stefaniola sp. (Diptera: Cecidomyiidae) on black saxaul, Haloxylon ammodendron(C.A.Mey.) Bunge ex Fenzl and white saxaul, H. persicum (Bunge ex Boiss. & Buhse) (Chenopodiaceae) in Beishawo Desert in Fukang,Xinjiang Uyghur Autonomous Region, China. Provided are its illustrated redescription and diagnosis, which was not included inthe original description, as well as data on the distribution and biology of this interesting, little known species. Mesopolobus desertiDzhanokmen, which is also newly recorded from China, was swept on both H. ammodendron and H. persicum at the same site asM. quadrimaculatus. Besides M. quadrimaculatus, seven other parasitoids were also reared from stem-galls of Stefaniola sp. on bothHaloxylon ammodendron and H. persicum. However, the relationships between these seven parasitoids and the gall inducer need furtherstudy.