Leptodactylus fuscus nests in the savanna of Calabozo (Guárico, Venezuela) from April to September. Eggs are deposited in foam nests in underground chambers. Details of embryonic and larval development are given. Gravid females contained eggs in three stages of development suggesting more than one clutch per season. Recruiting of young takes place 2½ months after eggs have been laid. There was not significant correlation between the number of eggs and female total length, neither between body volume and volume of ovarian complement. Eleven per cent of the body volumen was occupried by the egg mass. No significant correlation exists between this value and female body size. Peculiarities of the advertisement call of the male and presence of filial cannibalism are discussed.