October 28, 1925 - Rained during the late afternoon. At the base of the rocky cliff I found a small hole that led back into the rock wall; a small trap set (10627) there caught a Peromyscus. The traps again had two Blue tailed rats. These rats seem to be common in this region. A cat at the house caught two. From seventy-two traps set I cought three Blue tailed rats and one Peromyscus today. As near as I can make out the Blue-tailed? rats are omnivorous. As for the Peromyscus they eat insects and another substance in their strong hollows, very much like seed & pulp. In my experience in the tropics this far I have never been able to locate good places to set my traps by fecal droppings. I look around for the most likely place, and make my set. If I find a place where the cobwebs are absent, especially in the crevices of rocks w I usually make a set there; as a usual thing the ground is so hard that they can never see tracks. It is fairly easy to locate Sigmodon because of their nose through the glass. They seem to be the most common mammal in the country.