Landscape variation in the larval density of a bromeliad-dwelling zygopteran, Mecistogaster modesta (Odonata: Pseudostigmatidae)

In the premontane rain forests of northwest Costa Rica, patches of secondary forest can contain high densities of large Vriesea spp. bromeliads. Such patches contain an average of 6,470 ± 1,080 (s.e.) larvae ha-1 of the bromeliad-dwelling pseudostigmatid, Mecistogaster modesta, ca 3 6× higher than larval densities that we previously reported for adjacent primary forest.

Cyanallagma corbeti sp. nov. from Brazil (Odonata: Coenagrionidae)

The new species Cyanallagma corbeti (holotype ♂: Brazil, Rio Grande do Sul State, Rio do Pinto river, km 93 of road RS-453 between São Francisco de Paula and Rio Tainha, 29°30′70″S, 50°51′70″W, 900 m, 09 xi 1967, leg. N.D. Santos); deposited in the Museu Nacional (UFRJ), Rio de Janeiro, Brazil is described, illustrated, and compared…