20 ARKIV FÖR ZOOLOGI. BAND 2. NIO 20. 



limbs. The colour above is reddish grey witb a triangulär 

 dark spöt between the eyes, tapering behind to a short nar- 

 row stripe, connecting the spöt with a broad longitudinal mar- 

 king of the same colour, which occupies the middle and po- 

 sterior parts of the back. The light very distinctly granular 

 belly is provided with round dark spöts, and the whole hind 

 limb is cross-barred. The skin above is shagreened with 

 small scattered tubercles. An indication of a white spöt be- 

 low the eye. As it seems, the specimen agrees most with the 

 variety ventrimaculata Werner. 



The other seven evidently belong to the variety notata. 

 The smaller examples agree completely with Werner' s dia- 

 gnosis of this form as well as with Peter's figure. The larger, 

 however, are in want of the fine dark reticulations and the 

 white spöts on the knees and elbows; but being in other re- 

 spects quite similar, it is probable they all belong to the 

 same form, and those differences in colour mentioned are to 

 be reckoned as due to the different ages. The bright white 

 spöts on the limbs should then be a juvenile character, which 

 well agrees with the circumstance that also the light spöt 

 below the eye becomes more indistinct in older specimens. 

 Werner says that the forma notata is a »small variety», which 

 indicates he does not consider it to become larger than the 

 small individ uals with the white knee- and elbow-spots spö- 

 ken of above. Thus, it should be a kind of dwarfform of 

 Hylamhates rufus. In my opinion, there is, however, no rea- 

 son for such a supposition; it seems to me more probable 

 that it is as I have said above. 



The specimens vary in length from 23 to 69 mm. Ex- 

 cept the colour, there is no other great differences to be de- 

 tected between young and old specimens, being instead, as 

 seen by the table, wonderfully equal in the development of 

 the external parts. 



Hylambates aubryi A. Dum. 



The length of the specimens (15 in number) varies be- 

 tween 20 and 40 mm. The groundcolour above is whitish, 

 reddish grey or olive, all specimens having a dark triangulär 

 spöt between the eyes, which with a narrow stripe is con- 

 nected with a broad dark-coloured marking that occupies the 



