This paper describes further development of the study of a set of IRAS-defined T Tauri stars, located within the Taurus region (taken as the area RA = 4h to 5h; dec = +16° to +31°), and selected from the IRAS point-source catalogue purely on the basis of their [25 m – 12 m] and [60 m – 25 m] colours. The original selection, which is described elsewhere (Harris, 1985) was based on an analysis of the IRAS colours of the known T Tauri stars within the region (found to be tightly defined, and representing blackbody temperatures between about 200 and 300 K, and 100 and 200 K, respectively), and gave the intriguing result that the extended sample, defined purely by these colours, adhered strongly to the geographic clustering found previously both for the known T Tauri stars and for the (presumably very much younger) ‘dense core sources’.