Biological studies of Brazilian Scolytidae and Platypodidae (Coleoptera). V. The tribe Xyleborini.
Further results are presented of investigations in forests in the north-eastern Mato Grosso, Brazil, in September-December 1968 [cf. RAE/A 61, 835]. The biology of 30 species of Xyleborine Scolytids belonging to the genera Dryocoetoides, Premnobius, Sampsonius, Xyleborinus and Xyleborus is described, with special reference to their distribution, food-plants, gallery systems, and actual or potential economic importance. Seven species are recorded from Brazil for the first time. Two of the species, X. affinis Eichh. and X. ferrugineus (F.), are of known economic importance as vectors of pathogenic fungi of mango and cacao, respectively. The attacks of most species were secondary, but their galleries could damage felled logs and unseasoned timber.