Cerobasis guestfalica

* Cerobasis guestfalica (Kolbe, 1880) MATERIAL EXAMINED. Khoyniki district, Oktyabr’ village, 51°54′54″N, 30°02′42″E, 126 m a.s.l., from an abandoned swallow's nest inside an abandoned house, 29.07.2023, 1♀, 1 nymph, collected by sieving. DISTRIBUTION. Almost cosmopolitan species.The nearest localities are in Poland [Martini, 1975]. NOTES. A small (c. 1.5 – 2 mm) apterous (wingless) barkfly, in central and northern territories almost exclusively found in association with human habitation whereas in the South it is associated with the bark of trees and leaf litter.This species is readily distinguished by the characteristic ‘anchor’ mark on the head.