A new species from Italian Alps, Boreoheptagyia ortladamellica (Diptera, Chironomidae), is here described. The species is presently known only as adult male, it is similar to B. tibetica, because of the female-like antenna in adult male, but it can be separated by the following characters: much larger size, darker colour, medially pointed aedeagal lobe, knob-like and heavy sclerotized inferior volsella, gonostylus enlarged at basis with short spiniform setae at apex.