R.K.Selander, 1952 64 Sept. 5 8mi. SE Zacatecas, 8000 ft., Zacatecas, Mexico. Broke camp around 9:00; continued northward. Made a short stop 17 mi. SE Sombrerete, 7700 ft., Zacatecas where three Callicephala squamata were crossing the highway in an area of widely spaced, scrub mesquite. Collected one. Also took a lone C. brunnicapillus in mesquite. Continued on without event to Rio Mezquital, 6850 ft., 12 mi. NE Durango, Durango, Mexico. - Hunted for one hour in small tule marsh near the highway just before you cross the bridge over the Rio Mezquital on your way to Torreón. Extent of marsh perhaps 50 x 25 yds. No marsh wrens seen or heard and no nests seen. Noted yellow warblers commonly in trees near marsh. Green doves seen also, one Butorides striatus flew from edge of tules. - We then moved on over the bridge and turned to the left off onto a dirt road which runs along the river as follows: = tule M = mesquite = tuna cactus = collonwood = camp Rio Mezquital to Torreón -> dirt road < Durango ± 12 miles dirt road bridge Corn Corn