1904.] Allen, Mammals from Venezuela. 339 



conspicuous, chestnut and black post-in terscapular patch of 

 short stiff hair described above under No. 16136; two are 

 quite without any such differentiation of the color and texture 

 of the hairs of this region, while the other has the black hairs 

 on this area shorter and softer than those of the adjoining 

 pelage. Apparently, therefore, the presence or absence of 

 this highly differentiated patch is not sexual, nor does it 

 appear to be seasonal, as those with the patch were collected, 

 respectively, Sept. n, Jan. 30, and Feb. 6, while those without 

 it were taken, respectively, Oct. 20, Dec. 30, and Jan. 25. It 

 may, however, have some relation to the period of reproduc- 

 tion, which seems to vary with the individual, since a half- 

 grown young was taken Dec. 28, and two others much younger 

 were collected, respectively, Jan. 25 and Feb. 17. 



These specimens are presumed to be referable to Arcto- 

 pithecus flaccidus Gray (P. Z. S., 1849, p. 72, pi. xi, fig. i), the 

 type of which is the Dyson specimen from Venezuela, after- 

 wards renamed Arctopithecus flaccidus, var. i, dysoni by Gray 

 in 1869 (Cat. Cam., Pachy., and Edent. Mamm., 1869, p. 

 365), and still later (1871) Bmdypus columbicus by Fitzinger. 



9. Cholcepus didactylus (Linn.). La Union, i specimen, 

 adult female, June 2. 



10. Cyclopes didactylus (Linn.). Ciudad Bolivar, i 

 specimen, female, Aug. 10; San Ecidro, 2 specimens, male 

 and female, Feb. 6. 



11. Tamandua longicaudata (Wagner). Five specimens, 

 collected as follows: El Llagual, i specimen, May 7 ; Suapure, 

 i specimen, Feb. 8; Maripa, 3 specimens, Nov. 30 and Jan. 18. 



These five specimens of the Yellow Tamandua are very 

 different in cranial characters as well as in coloration from the 

 common Tamandua tetradactyla, and show beyond question 

 that the species is well-founded, although the tail is not 

 "nearly double the length of the body," as stated by Turner 

 (P. Z. S., 1851, 218), the relative length of the tail to the body 

 being apparently about the same as in T. tetradactyla, as given 

 by Wagner (Suppl. Schreber's Saug., IV, 1844, p. 210). The 

 ears, however, are much longer and larger. 



Four of these specimens show no trace of the dark color 



