Rio San Miguel, 13°25'N. Dept., San Miguel Feb, 2 - 1924 - Feb, 21, 1924 Didelphis mesamericana - Tacuacin Three opossums of this species was added to my list from this locality. No. 11042 was caught by our helper one night while he was hunting with a hunting lamp and brought it camp alive. No. 11060 was caught in a trap set under a wild pine apple hedge that bordered the old weedy bean patch on the south where I caught many Sigmomys and Oryzomy's. The trap was baited with a freshly killed Groove-billed Ani. No. 11094 was shot at night by one of our men. I frequently saw the tracks of these opossums early in the morning in grayish muddy cow trails which led through scrubby Jicaro or Guacal trees and Dividivior Cascalo trees. The natives are well acquainted with this mammal and call it Tacuacin. The stomach content of one of the specimens taken contained seed hulls and hair but the others were empty.