P. Graefe 1954 87 Cronidophora lucti. Buenos Aires, # of Chaymaa Lima, Mepic April 26 Three shot in canyon bottom and on rocky hillsides. SV 48, 60 and 63 mm. Ground color dark brown. Tail lighter with no lighter, sinley rings especially evident on the lower surface. The lateral and dorso-lateral light lines are distinct to the base of the tail, but very obscure on the tail. These lines are very light too. The generatetal lines as fused most of the way in SV individual, being distinctly separated anteriorly and somewhat less so along the hind edge where the line is diffuse (SV 60). On the other two, the lines are separate their full length. The genarotatal lines are much browner than the lateral and dorso-lateral ones. Ventral surface white. Dorsal surface of head and legs similar brown. April 29 All lucti which I have seen have been in the canyon in which we have camped or on rocky hillsides, while C. tigris is present in the more level, less rocky areas. I took the two within a few hundred feet of one another at the mouth of our canyon, but not together.