"Tadarida femorosacca (Merriam) in Tamaulipas, Mexico" by Walter W. Dalquest and E. Raymond Hall is a scientific publication written in the mid-20th century. This work contributes to the field of mammalogy, specifically focusing on the distribution and identification of the pocketed free-tailed bat species, Tadarida femorosacca, in the region of Tamaulipas, Mexico. The content of the publication includes a detailed account of the discovery of two specimens of Tadarida femorosacca, one alive and one deceased, found in a cave in Tamaulipas. The authors report that this finding extends the known geographic range of the species significantly from its previously documented location in Jalisco, Mexico. Included in the discussion are morphological measurements of the skulls of the specimens, references to prior research, and an observation of a large population of bats likely residing in the cave, evidenced by substantial guano deposits. The publication serves as an important record for researchers interested in the biodiversity and distribution of bat species in Mexico. (This is an automatically generated summary.)