AMERICAN BATS OF THE GENERA MYOTIS AND PIZONYX 179 



Myotis nigricans mundus Osgood, Field Mus. Nat. Hist., publ. 176, zool. ser., 



vol. 10, p. 182, April 20, 1914 (not of H. Allen=ilf. alhescens). 

 Myotis simus Osciood, Field Mus. Nat. Hist., publ. 176, zool. ser., vol. 10, p. 182, 



April 20, 1914 (not of Thomas). 

 Myotis ruber Tceaysi J. A. Aixen, Bull. Amer. Mus. Nat. Hist, vol, 33, p. 383, 



July 9, 1914 (Inca Mines, Peru, Lat. 13° 30' S., Long. 70 W., altitude, 



6,000 feet). Red phase. 

 Myotis punensis J. A. Axlept, Bull. Amer. Mus. Nat. Hist., vol. 33, p. 383, July 



9, 1914 (Puna Id., Ecuador). 

 Myotic tondce J. A. Axlen", Bull. Amer. Mus. Nat. Hist., vol. 33, p. 384, July 



9, 1914 (Bonda, Santa Marta, Colombia). 

 Myotis maripensi^ J. A. Axlen, Bull. Amer. Mus. Nat. Hist., vol. 33, p. 385, 



July 9, 1914 (Maripa, Rio Caura, Venezuela). 

 Myotis esmeraldce J. A. Aixen, Bull. Amer. Mus. Nat. Hist., vol. 33, p. 385, 



July 9, 1914 (Esmeraldas, Ecuador). 

 Myotis caucensis J. A. Axlen, Bull. Amer. Mus. Nat. Hist., vol. 33, p. 386, 



October 30, 1914 (Rio Frio, Colombia). 

 Myotis nigricans nigricavs Milleb, List North Amer. Recent Mamm. 1923, Bull. 



U. S. Nat. Mus., No. 128, p. 72, 1924 (part). 



Type locality. — Fazenda de Aga, near the Rio Iritiba, province of 

 Espirito Santo, eastern Brazil, 



Type specimen. — The type was collected, about 1823, by Prince 

 Maximilian zu Wied, Its present whereabouts, if it is still in 

 existence, is not known. 



Distribution. — Central and South America from Guatemala to 

 southern Brazil and from coast to coast. 



Diagnosis. — Size maximum for the species; greatest length of 

 skull usually more than 13.5 mm. and not infrequently more than 

 14 mm. (known maximum 14.7) ; foot usually less than half as long 

 as tibia (average ratio of foot to tibia in series of ten examples from 

 single localities ranging from 44.6 to 49.1) ; ear usually not ex- 

 tending beyond nostril when laid forward. 



Color. — The general color above, when the fur is smoothed so 

 that the blackish-slate bases of the hairs do not appear on the surface, 

 is a brown near the Mars brown of Ridgway, usually darker and 

 more blackish but occasionally lighter and more nearly approaching 

 Prout's brown or russet. Sometimes there is a decided tinge of gray 

 or ocher, especially on the neck and head. Underparts not so dark 

 as back, and often with a buffy or yellowish cast. In the red phase 

 the color is suffused with orange, producing a brown very near to 

 the Sudan brown of Ridgway. 



Measurements. — For measurements see tables, pages 184 and 187. 



Specimens exa/tnined. — Total number 648, from the following- 

 localities : 



BOLIVIA: Balzan, 4 ale. (B. M.) ; Buenavista, 3 skins (A. M. N. H.) ; 

 Caiza, 4 ale. (B. M.) ; Rosario, 4 ale. (U.S.N.M.) ; Rio Surutu, Dept. 

 Santa Cruz, 5 skins (A. M. N. H.) ; Rurreuebaque, Beni. 1 ale. (U.S.N.M.) ; 

 Sania Cruz Province, 8 ale. (B. M.) ; no exact locality, 2 skins (B. M.). 



