The reproductive behaviour of N. c. chinensis has been studied in the field (Dehra Dun, India), and compared with that of the holarctic Calopteryx species. Save for minor details, it is essentially similar to that recorded in other members of the family. Courtship is well marked and the 66 demonstrate ’’territorialism” over small, shaded streams. Copulation lasts 3-4 min and is performed perching oij vegetation or exposed rocks near the stream. Oviposition is endophytic and the eggs are laid by unattended 99 in submerged vegetation. They are cylindric, covered by a thin, gelatinous investment.