Calopteryx virgo (male)
English name:	Beautiful Demoiselle
Dutch name:	Bosbeekjuffer
Photo taken near Röjdåfors, Sweden, 17th of July, 1996

Note: The only damselfly in Europe of which the male has all-dark wings. In Mediterranean countries, there's the subspecies C. v. meridionalis (links to male and female for pictures and differences with C. virgo virgo).