Abstract. Hourcq, J.-J.- Ophrys arachnitiformis Grenier & Philippe 1859, a new species for the flora of the PyrŽnŽes-Atlantiques (Aquitaine, France) [Natural. belges 80 (Orchid. 12) (1999): 94-96]. Report of the first finding of Ophrys arachnitiformis s. str. in the department of the PyrŽnŽes-Atlantiques (64, France).

Key-Words: Orchidaceae, genus Ophrys, Ophrys sphegodes complex, Ophrys arachnitiformis. Flora of France, flora of department of PyrŽnŽes-Atlantiques (64).