Four new species and some new records of Brazilian frog-biting midges (Diptera: Corethrellidae).

Four new species of Corethrella are described from Brazil. Corethrella xokleng sp. n. and C. cambirela sp. n. are described from males and females, and Corethrella yanomami sp. n. and C. munteantaroku sp. n. are described from a female and male, respectively. Fourteen Corethrella species have new distributional records, with five of these being first records for Brazil. The number of valid species of Corethrellidae known from Brazil is increased from 37 to 46.

New species and records of frog-biting midges from southern Brazil (Diptera: Corethrellidae).

Corethrella borkenti sp. n. is described, based on female and male adults, pupae and larvae, collected from tank bromeliads in the Atlantic Forest of southern Brazil. The larva and pupa of C. alticola Lane, 1939 are described for the first time. New distributional records for C. alticola and C. vittata Lane, 1939 extend their distributions to the southern Atlantic Forest. A key to pupae of peruviana group is given.