EN
Chamaesphecia nigrifrons (Lepidoptera: Sesiidae) has been hitherto known in Poland on the basis of a single specimen caught in 1967 in Bieszczady. In 2007 the presence of this species in Poland was confirmed. It was reported from a number of sites in Polesie Lubelskie and Podlasie, over the area of 14 UTM squares. The paper presents morphological description and new biological data on this clearwing moth.