Results of butterflies sampled as by-catch in Malaise traps deployed in indigenous forests at Parc National de Nouabalé-Ndoki, Republic of Congo are presented. Using traps deployed with cyanide as a killing agent, rather than the standard ethanol, 153 species of butterfly belonging to five families were sampled, which constituted nearly one-third of the butterfly species known from the Park, with numerous species not encountered during general collecting. The benefits and drawbacks of using this technique, as well as the potential for these traps to be used as part of future butterfly inventories are discussed. The species samples are presented in a tabulated form.

A new genus Chalcibotys is erected in the Spilomelinae to group two new species who have external resemblances to Chalcidoptera appensalis var. aethiops Gaede,1917.

The unusual habit of the larva of Eublemmistis chlorozonea Hampson, 1902 (Lepidoptera: Erebidae) of covering itself in its lichen host is reported and illustrated for the first time. We review the known information on this species and discuss its ecology and distribution.