Host Size Preference of the Leafcutter Ant Parasitoid Eibesfeldtphora tonhascai (Diptera: Phoridae).

Eibesfeldtphora tonhascai Brown (Diptera: Phoridae) is a natural enemy of Atta sexdens Linnaeus and Atta laevigata Smith and is considered a promising candidate for the biological control of these ants. The aim of this study was to verify if E. tonhascai has a preference for specific sizes of A.

Parasitism by Phorids on Leaf Cutter Ants (Linnaeus, 1758) (Hymenoptera: Formicidae) in Natural and Agricultural Environments.

The leaf cutter ant (L.) (Hymenoptera:Formicidae) causes huge economic losses to agriculture in the Neotropics. In natural environments, parasitic flies of the Phoridae family are natural enemies of leaf cutter ants.

Mechanism of trail following by the arboreal termite Nasutitermes corniger (Isoptera: Termitidae).

In this study, we investigated the mechanisms used by the arboreal termite Nasutitermes corniger (Motschulsky, 1855) to follow trails from the nest to sources of food. A plate containing one of seven trail types was used to connect an artificial nest of N. corniger with an artificial foraging arena.

[Sexual dimorphism of guava weevil Conotrachelus psidii Marshall (Coleoptera: Curculionidae)].

We investigate structural and behavioral differences between male and female adults of guava weevil, Conotrachelus psidii Marshall, 1922 to help in sex determination. Weevils collected from a commercial guava orchard were individually caged and maintained under laboratory conditions. Every day ten individuals were grouped and their behavior was observed.