ARIMO BATS OP THE GENUS TADARIDA — SHAMEL 5 



1878. Nyctinomus brasiliensis Dobson, Catal. Chiropt. Brit.-Mus., pp. 437-439 



(part) . 

 1889. Nyctinomus mohavensis Merriam, N. Amer. Fauna, no. 2, p. 25, October 



30, 1889. 

 1894. Nyctinomus brasilinensis californicus H. Allen, Monogr. Bats N. Amer., 



BuU. U. S. Nat. Mus., 43 (1893), p. 166, March 14, 1894. 

 1918. Nyctinomus mexicanus H. Grinnell, A Synop. Bats Calif., Univ. 



Calif, pub. zool., vol. 17, pp. 361-369, January 31, 1918. 

 1924. Tadarida mexicana Miller, N. Amer. Recent Mamm. 1923, Bull. U. S. 



Nat. Mus. 128, p. 86, April 29, 1924. 



Type locality. — Ameca, Jalisco, Mexico. The describer selects no 

 specimen as type, but gives as the habitat the plateau of Mexico. 

 Specimens are mentioned from Ameca, Jalisco, and from Cofre de 

 Perote, Vera Cruz, In the United States National Museum collec- 

 tion are three specimens from San Pedro, Jalisco, which is in the 

 immediate vicinity of Ameca, and 23 others from various places in 

 Jalisco. I have therefore chosen Ameca, Jalisco, as the type locality. 

 A specimen labeled, "Mexico" (Saussure) and marked type of 

 Mollossus mexicanus was examined in the Berlin Museum in 1904 

 by Mr. Miller who thinks that it is probably a cotype. Measure- 

 ments were taken at the time as follows: Total, 91; tail, 32.6; tibia, 

 12; foot, 9; forearm, 41.6; ear from meatus, 19; ear from crown 15. 

 Adult male. 



Geographic distribution. — Mexico, Texas, New Mexico, Arizona, 

 California, Lower California, Utah, and Oregon. 



Diagnosis. — The forearm is 40.4-46.6 mm. in length, usually 

 ranging somewhere between 42 and 44 mm. It only seldom reaches 

 45 and rarely goes below 42. Length of tibia from 11.4-13.0 mm., 

 average about 12. Length of skull 16.2-17.8 mm., usually 16.2- 

 17.4. Ear extends to end of nostril when laid forward. When the 

 skulls are compared with those of T. brasiliensis the greatest difference 

 is seen to be the narrower rostrum in the Mexican form. In 18 

 skulls of T. brasiliensis the width at m^ ranges from 6.8 to 7.2 mm.; 

 while in 50 skulls of T. mexicana the width at m^ ranges from 6.2 

 to 6.8 mm. In only one of the South American skulls measured is 

 the total length under 17.0 mm., while in T. mexicana it is frequently 

 less than 17.0 mm. The tibia averages somewhat shorter than that 

 of T. brasiliensis. 



Measurements. — For detailed measurements see tables, pages 18 

 and 24. 



Specimens examined. — Seven hundred twenty-two from the follow- 

 ing locahties: Mexico (285): Puebla, 3 skins, 14 alcoholics; Vera Cruz, 

 3 skins; Morelos, 2 skins, 10 alcohohcs; Lerma, 2 skins, 23 alcohohcs; 

 Tacubaya, 6 skins, 18 alcohohcs; Hidalgo, 1 skin, 2 alcoholics; 

 Michoacan, 6 skins, 32 alcoholics; Colima, 76 alcohohcs; Chapala, 

 1 alcohohc; Jalisco, 26 alcoholics; Queretaro, 5 alcohohcs; Guana- 

 juato, 24 alcoholics; San Luis Potosi, 83 alcohohcs; Zacatecas, 4 



