NORTHEASTERN MEXICO 23 APRIL - 12 MAY, 1975 The purpose of this trip is two fold: (1.) to Collect the rare, legless, blind, burrowing lizard Anelytropsis papillosus and (2.) to collect Those species of neo tropical plethodontids that occur at the periphery of the radiation in northeastern Mexico. The people on the trip were as follows: Allen Greer (A.G.), Philip Greer (P.G.), Sam Sweet (S.S.S.) and Jim Hanke (J.H.) The trip was financed by MVZ, Dave Walter's NSF grant and by personal funds. All specimens are in the Museum of Vertebrate Zoology, Berkeley, Calif. (MVZ). 23 April Left Berkeley at 3:30 PM and took Hwy 24 to Interstate 580 and then onto Interstate 5 South. Stopped at junction Interstate 5 and Hwy 58 for dinner at about 9:00 PM. After dinner took Hwy 58 east through Bakersfield and Tehachapi Pass. Stopped for the night on a side road just NW of Mohave. Wind was blowing and night was cool. 24 April Awoke at 7:00 AM and were on the road by 7:15 PM. Drive into Mohave for breakfast. Left Mohave going west east on Hwy 58 to Hwy 395 which we took south to I-15. From I-15 we hit I-10 and stayed a bit to the