1897.] NATURAL SCIENCES OF PHILADELPHIA. 35 



forearm, the leg and the tarsus as far as the midtarsal line, are 

 covered with sparse short unicolored light gray hair ; the face is 

 well covered with short hair, the snout alone being naked. The tail 

 at the basal inch is marked by the same character of hair as the 

 rump. The proportion of plumbeous hair at the base is, however, 

 less. The remaining part of the tail is hairless, except at the term- 

 inal three inches where a conspicuous pencillated arrangement of 

 obscure black hair is seen. The flexor surfaces of contact of the 

 thigh and leg are naked, as also are the palms and soles. 



REMARKS ON THE SPECIES OF TARSIUS. 



Burmeister gives an elaborate synonymy of T. spectrum, as de- 

 nominated by him — the T. tarsius of this essay — and refers to* and 

 figures a second species which he names T. fischeri. I find the 

 Academy's specimen answers to the description of the species last 

 named. But Burmeister had previously described this form under 

 the names of T. fuscus. Geoffrey subsequently named it T. fusco- 

 manus. Forbes 3 decides without criticism that the names T. fusco- 

 manus and T. fischeri are synonyms of T. fuscus. In the same 

 volume T. spectrum is changed to T. tarsius. I have accepted this 

 plan of naming the two species, and thus the Academy's specimen be- 

 comes T. fuscus. Mr. Lyddeker informs me by post, that while he 

 uses the name T. fusco-manus in his work on Geographical History 

 of the Mammalia, he would now accept T. fuscus. A. B. Meyer* 

 employs T. fusco-manus, though changing it to T. fuscus in a later 

 publication, which unfortunately is not to be found in the libraries 

 of this country. The author last named, described in the above 

 series a new species under the name T. philippensis, character- 

 ized by possessing naked tarsi and tail. Professor Meyer writes 

 that he has since described a fourth species under the name T. 

 sangirensis, an account of which has not come to hand. The genus, 

 therefore, now contains four accredited species, T. tarsius, T. fuscus, 

 T. philippensis and T. sangirensis. 



In discussing the synonymy of T. spectrum, Burmeister states that 

 T. daubentonii is " blackish and ash-gray " in color ; T. bancamis 5 

 recalls in its dark colored fur the foregoing. T. spectrum is " yellow 



3 Allen's N. H. Libr., Primates, 1894,1, p. 21. 



4 Abhand. u Berichte des Kongl. Zool. u Anthropolog.-Ethn. Museums zu 

 Dresden, 1894, I. 



5 1 have carefully studied the account of Tarsus bancanus Horsfield (Nat. 

 Hist. Java). It has minute lateral incisors and no upper central incisors. 

 The premolars and molars together number but five ; it is probable that the 

 first premolar is absent. The tarsus is less elongated, the ears are smaller and 

 the tail less pencillated than in T. fuscus. The form is most likely immature. 



