Abstract
Several flares were detected in the flare stars EV Lac and V 577 Mon in high time resolution observations carried out with the 40-cm telescope at Byurakan, the 1-m telescope of the OAN in Tonantzintla, and the 2.1-m telescope of the INAOE in Cananea. About half of the detected flares are of the spiky type with a total duration less than 1 sec. It is shown that the spiky flares which occur mostly after normal, longer lasting flares are systematically bluer than the preceding main flares.
