Parasitism of Andrena (Suandrena) savignyi Spinola (Hymenoptera: Andrenidae) by Stylops Kirby (Strepsiptera: Stylopidae) has been recorded only once, and from an individual collected in Egypt almost a century ago, with the parasite described as Stylops savignyi Hofeneder. The recent rediscovery of this Stylops from an individual of Andrena savignyi permits a reinterpretation of the species and its affinities among other Stylops. The bee was collected at flowers of Zilla spinosa (Turra) Prantl. (Brassicaceae) in Amariah, Riyadh, Kingdom of Saudi Arabia. Based on DNA barcode sequences from material sampled across Africa, Asia, and Europe, it is apparent that Stylops savignyi is conspecific with Stylops nassonowi Pierce, and we accordingly synonymize this name (syn. n.), with the latter representing the senior and valid name for the species. A differential diagnosis is provided for Stylops nassonowi and the morphology of the female is described, as well as the first instars.

Departamento de Zoología Instituto de Biología Universidad Nacional Autónoma de México Mexico City DF Mexico

Department of Plant Protection College of Food and Agriculture Sciences King Saud University PO Box 2460 Riyadh 11451 Kingdom of Saudi Arabia

Department of Plant Protection College of Food and Agriculture Sciences King Saud University PO Box 2460 Riyadh 11451 Kingdom of Saudi Arabia ; Current address 6 125 Cole Road Guelph Ontario N1G 4S8 Canada

Department of Zoology Charles University Prague Viničná 7 CZ 128 44 Praha 2 Czech Republic

Division of Invertebrate Zoology American Museum of Natural History; Division of Entomology Natural History Museum and Department of Ecology and Evolutionary Biology 1501 Crestline Drive Suite 140 University of Kansas Lawrence Kansas 66045 4415 USA

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Strepsiptera of Canada