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In the present work, an atypical new species of Paracloeodes Day (Ephemeroptera: Baetidae) is described based on nymphs collected in the Caldas Department, Central Cordillera of Colombia. This represents the first report of the genus from Colombia. The main characteristics that distinguish the new species from congeners are: abundant setae on femora, antennae length twice the width of the head capsule, maxilla with palp twice the length of the galea-lacinia, segment II of the labial palp with a rounded projection and 2.5 times the width of segment III, tarsal claws half the length of their respective tarsi and the abdominal color pattern. The concepts of the genera Paracloeodes, Varipes and Rivudiva are discussed in light of the discovery of P. caldensis n. sp.

Three new species of Tricorythopsis Traver (Ephemeroptera: Leptohyphidae) are described and illustrated based on nymphs from southeastern Brazil. These new species can be distinguished from other species of the genus by the following characters: Tricorythopsis araponga sp. n.: (1) femora with long setae; (2) abdominal segments 5 -7 with dorsal tubercles; (3) tarsal claws with 4 -6 marginal denticles and 7 þ 4 submarginal denticles. Tricorythopsis baptistai sp. n.: (1) tarsal claws with 4 -5 large marginal denticles and one submarginal denticle on each side; (2) abdominal colour pattern; (3) abdomen without tubercles; (4) coxae without projections. Tricorythopsis pseudogibbus sp. n.: (1) abdominal segments 6 -8 with small dorsal tubercles; (2) tarsal claws with four large marginal denticles, and 3 þ 1 or 2 submarginal denticles; (3) coxae dorsally projected; (4) femora broad and with short setae; (5) pronotum with anterolateral projection.

EphEmEroptEra (InsEcta) dE caldas-colombIa, clavEs taxonómIcas para los génEros y notas sobrE su dIstrIbucIón yEIsson gutIérrEz 1,3 lucImar g. dIas 2,3

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Description of the adults of Camelobaetidius billi (Ephemeroptera, Baetidae). The adults of Camelobaetidius billi Thomas & Dominique, 2000 are described for the first time. They can be distinguished from the other known adults of the genus by the following combination of characters: in males, turbinate portion of the compound eyes orange, abdominal color pattern, and the shape and relative length of the forceps articles; in females by the abdominal color pattern. The specimens were collected at Presidente Figueiredo, State of Amazonas, Brazil, and represent the first report of the species in Brazil.

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