Preliminary data on the life history of Cercion lindeni (Selys) in southern Spain (Zygoptera: Coenagrionidae)

A preliminary study of larval development in C. lindeni was carried out in 3 streams in the Sierra Morena, southern Spain; 2 of them are regulated rivers. In the area studied, this sp. is bivoltine. The final instar was not encountered after September or before January. Metamorphosis occurs in winter-spring and also in summer. The relationship between developmental stage and larval head width varied seasonally in the populations analyzed. Final-instar larvae contributing to the first wave of emergence were larger than those contributing to the second wave.