Kiel diagram (log T_eff versus log g) of a sample of B-type stars near the main sequence – for which an in-depth analysis was carried out – observed by CoRoT (labelled in dark blue) and by Kepler (labelled in dark red), showing the position of KIC 10526294 (plotted with a white marker). The dot-dashed line represents the zero-age main sequence (ZAMS), while the dashed line represents the terminal-age main sequence (TAMS). The thin grey lines denote evolutionary tracks for selected masses, and the β Cep (light grey) and SPB (dark grey) instability strips (Dziembowski 1977) are also plotted. These were all calculated for Z = 0.015, X = 0.7, using OP opacities (Seaton 2005) and A04 heavy element mixture (Asplund et al. 2005). Other details are the same as in Pamyatnykh (1999). Different error bars reflect differences in data and methodology.