4 popularly used nonverbal intelligence tests were administered to a group of children from the Shilluk, a primitive Negro tribe in the Southern Sudan. 184 children were attending school at the time of testing and 107 were not. Results on the Porteus maze, Goodenough-Draw-A-Man, and Goodard form-board gave scores which classify the majority of the children as high grade mental defectives. In the Goodenough test, 227 of the 291 Ss received IQ's between 40 and 70. The Porteus scores were somewhat higher but here the median IQ was 76.5, using published norms. Only the Alexander Passalong test scores represent a Gaussian distribution with a mean IQ of 94.4. It is suggested that the normal Shilluk child is likely to have some sort of ability that evades the capacity of traditional testing devices to measure. If a proper test is developed it is argued that they would react as well as any normal group.