The chromosomes of three species of tortricids (Lep. Tortricidae).
Examples of Tortrix viridana L. and Cydia pomonella (L.) (Laspeyresia pomonella) collected near Madrid, Spain, and of Pseudococcyx tessulatana (Stgr.) collected in the Spanish province of Murcia were examined cytologically. The chromosome numbers were found to be n=30, n=28, and n=28, respectively. Notes are given on the bionomics, food-plants and world distribution of these species.