Nest No. 1 of Quartinia canariensis: 20 Close vicinity of the nest with a small fly (Diptera, Cyclorrhapha, Fam. indet.) probably inspecting the nest entrance 21 Female re-entering nest head first after backing out of the shaft prior to onset of flight activity in the morning 22 Nest entrance with dull whitish inner silken lining 23 Excavated burrow on 5 April, 2015 with turret removed and the shaft opened in the upper part to show the inner wall. The content of the opened brood cell No.2 is visible at the lower end of the shaft 24 Silk threads on and between sand grains from the wall of the nest.