JESimpson, 1938. 67. 270'ft., Rancho de Costa Rica, Rio Sonora, Sonora. May 2, 1938, continued. water-tank: Eumops perotis (o>281), Eptesicus fuscus, (no emb.), and Tadarida mexicana (o>283, 284, 285.) Mr. Jim Bliven told us of the previous collect- ors at Costa Rica (he was in California for visit when Dr. Benson was here two years ago): the Sheldon party, the Lamb party, Winthrop with Vernon and Bernard Bailey, and others he wasn't sure of. He even remembered the latter party finding drowned the type and only specimen of Perocephalus flavus sonoriensis Goldman. Mr. Bliven told us of the large herds of antelope formerly here, but now very rare due to the hunters slaughtering them by giving chase in the open-ground in autos. Set out 50 mousetraps and 50 live-traps in corn-field and wheat-field bordered by mesquite. Dr. Benson improved our Borell-bat-trap by using four water-pipes to tie six wires in three cross- lines: . The water in the tank was pumped up to about 6-10" deep; the wires were about 2" above the water. We caught: 8 mastiff bats, 8 brown bats, and 16 mexican free-tail bats. May 3, 1938. In the wheat-field and cornfield (most in latter) cought in mousetraps: 1 Perocephalus flavus sonoriensis (no emb.) (topotype: #297), 1 Perocephalus [illegible] (not saved), 3 Pero- cephalus baileyi (o>298, #299), 9 Rhyrnodontys sp. (6075 ``` ```json {"text": "JESimpson,\n1938.\n\n67.\n\n270'ft., Rancho de Costa Rica, Rio Sonora, Sonora.\n\nMay 2, 1938, continued.\nwater-tank: Eumops perotis (o>281), Eptesicus fuscus,\n(no emb.), and Tadarida mexicana (o>283, 284, 285.)\n\nMr. Jim Bliven told us of the previous collect-\nors at Costa Rica (he was in California for visit\nwhen Dr. Benson was here two years ago): the Sheldon\nparty, the Lamb party, Winthrop with Vernon and\nBernard Bailey, and others he wasn't sure of. He\neven remembered the latter party finding drowned\nthe type and only specimen of Perocephalus flavus\nsonoriensis Goldman. Mr. Bliven told us of the\nlarge herds of antelope formerly here, but now\nvery rare due to the hunters slaughtering them\nby giving chase in the open-ground in autos.\n\nSet out 50 mousetraps and 50 live-traps\nin corn-field and wheat-field bordered by mesquite.\n\nDr. Benson improved our Borell-bat-trap by\nusing four water-pipes to tie six wires in three\ncross-\nlines: . The water in the tank was pumped\nup to about 6-10" deep; the wires were about 2"\nabove the water. We caught: 8 mastiff bats, 8 brown\nbats, and 16 mexican free-tail bats.\n\nMay 3, 1938.\n\nIn the wheat-field and cornfield (most in latter)\ncought in mousetraps: 1 Perocephalus flavus sonoriensis\n(no emb.)\n(topotype: #297), 1 Perocephalus [illegible] (not saved), 3 Pero-\ncephalus baileyi (o>298, #299), 9 Rhyrnodontys sp. (6075"