  We discuss an evaporation-induced wetting transition on superhydrophobic
stripes, and show that depending on the elastic energy of the deformed contact
line, which determines the value of an instantaneous effective contact angle,
two different scenarios occur. For relatively dilute stripes the receding angle
is above 90$^\circ$, and the sudden impalement transition happens due to an
increase of a curvature of an evaporating drop. For dense stripes the slow
impregnation transition commences when the effective angle reaches 90$^\circ$
and represents the impregnation of the grooves from the triple contact line
towards the drop center.
