Journal Haber, M.S. 1977 26 July (cont) Guanajuato, Guanajuato, Mexico. city with many castle-like structures of stone. Several beautiful motels/hotels are situated on the steep mountain-side overlooking the city. We drove into the "centro" area looking for a moderately priced motel in which to do our karyotyping. We promptly got lost and ended up in an underground road system (built of large pieces of stone with cobblestone streets) which seemed to completely underlie the city. We eventually found our way out of the underground system and returned up the mountainside (as we had entered town) on the road toward Dolores Hidalgo. 1800 checked into a nice motel on the hillside, karyotyped and prepared specimens, had a nice dinner and retired 2200. 27 July Vicinity of Guanajuato, Guanajuato, Mexico. 0600 awoke and spent the morn morning preparing specimens. 1200 departed Guanajuato and drove NE on Hwy 110 to the small town of Santa Rosa. (This is a Goldman locality for T. unbrinus) We turned off and drove down the steep mountainside, past the small settlement of