rito, Dean Journal June 27 Durango, Parque Nacional Los Mermeros, Hidalgo, Mexico. I got a late start today, leaving DF around 11:00. Drive to Mineral del Monte and on to Ormitán, just past Durango - the type locality of P.C. menesi. Looked on a hill S of town for ~30min but it was extremely dry. Drove into PN El Chico and searched briefly with the same result. Headed on to the town of Durango, Municipio Zimapán in PN Los Mermeros. This is the type locality of Christoperbatsa mosaweri, which was found in a 25 ft deep cave above the town. I found Javier Fright a delegator who took me to see Juan Alvarado (Jal: 77-2126-99(2), 77-2125-1047) who knew about a cave where the town got its water from. He said it is a natural cave (although they expanded the opening) that flows with water when it rains, and is completely full of water starting ~30m in. I went w/ Javier and 2 other men and entered the cave around 19:45. The opening is basically a hole at the head of a gully that goes into the mountainside, and is large enough to move through crouched over. I immediately found an adult C. mosaweri, which was on the lower part of the cave wall near the entrance and moved rapidly to escape. I continued in and found a juvenile C. mosaweri on the wall, plus a large adult C. magnipes. I went in 20-30m; walls are covered in mud and there are some small stalactites; didn't reach the water. Found 3 more C. magnipes on the cave ceiling, all near the entrance; they are much more sluggish than the C. mosaweri. I was then treated to a dinner of barbacoa and beer. Spent ~20 min total searching. Was told there are at least 20-30 caves (sotanos - vertical shafts) near town, but most are 50+m deep. Drove back to DF, arriving at 03:30.