Orthemis sibylla is shown to be a junior synonym of O. ambirufa, based on a comparison of the holotype male of O. ambirufa with voucher specimens in the UMMZ identified as O. sibylla by Ris and specimens of this species from French Guiana and Venezuela in the RWG collection. Diagnostic characters of the male holotype…
The Odonata checklist of continental Portugal, Madeira and the Azores includes 65 species. Besides Sympetrum nigrifemur, an endemic of Madeira and the Canary Islands, and the unique population of the Nearctic Ischnura hastata in the Azores, the species composition reflects a higher proportion of western Mediterranean and Ethiopian elements than any other European country. An…
In September and October 1998 adults of Anax junius, (Common Green Darner) were encountered in small numbers at coastal sites in southwestern U.K. Circumstantial evidence supports the inference that they reached there on winds originating from New Brunswick and Quebec Canada in early September, a time when this species regularly migrates southwards along the Atlantic…