ANEW SPECIES OF WIEDEMANNIA ZETTERSTEDT FROM GRAND CANYON NATIONAL PARK, WITH NOTES ON ADDITIONAL NEARCTIC SPECIES (DIPTERA: EMPIDIDAE)

摘要

Wiedemannia digna sp. nov. is described from Grand Canyon National Park(Arizona, USA) and additional records of W. apicalis Sinclair, W. lepida(Melander), and W. simplex (Loew) are listed. An updated key to NorthAmerican species is also provided. With the description of a new species below, there are now seven species of Wiedemannia known from North America, The rarest species remains W. vexillum Sinclair,known only from the hoiotype collected, in. the Northwest Territories. In. addition to thedescription of a new species, new locality records for W. lepida (Melander), W. apicalisSinclair. W. simplex (Loew) discovered since the last revision of this genus (Sinclair1998) are provided.