The collateral projections of spinocerebellar neurons located in the L 2to Ca 1 spinal segments in the cat were investigated by retrograde fluorescent double labeling technique. Rhodamine labeled latex microspheres (Rm) amd Fast Blue (BF) were used for injections into the cerebellum in 8 cats. Two additonal cats, with injections of Fluoro-Gold (FG) combined with Rm were excluded because lipofuchsin autofluorescence obscured the labeling. Aafter injections with one tracer unilaterally in the paramedian lobule and another tracer bilaterally in the anterior lobe, double labeled neurons were found on the side of the paramedian lobule injection in the anterior lobe, double labeled neurons were fond on the side of the paramedian lobule injection in the column of Clarke at L2-L4, laminae IV-VI at L2-L5 and the dorsolateral nucleus at L2-L6. After bilateral injections of one tracer in lobule VIII Band another in the anterior lobe, double labeled neurons were found bilaterally in the column of Clarke at L2-L4, laminas IV-VI at L2-L5, the medial part of lamina VII at L6-L7 and in certain cell groups at sacro-coccygeal levels. Neurons in the lateral nucleus of L4-L5 were labeled exclusively from. injections in the anterior lobe. The findings indicate that spinocerebellar neurons at lumbar and more caudal levels of the cat spinal cod have different projection patterns in the cerebellum. A certain number of neurons which project to the anteriro lobe have divergent axon collaterals supplying also the postrior vermis and/or the paramedian lobule. Other peurons project to the anterior or to the posterior lobe only.