1. MAXTELLA, 141 



1. MANTELLA. 



Pui^il horizontal. Tongue elongate, free and (distinctly nicked 

 behind. Tympanum distinct. Pingers and toes free, the tips 

 dilated into regular disks. Outer metatarsals united. Omosternum 

 and sternum with a bony style. Terminal phalanges T-shaped. 



Madagascar. 



1. Mantella betsileo. 

 • Dendrobates betsileo, Grandid. Ann. Sc. Nat. (5) xv. art. 20, p. 11. 



Snout subacuminate, as long as the diameter of the eye, "with 

 angular canthus rostralis ; loreal region vertical ; interorbital space 

 broader than the upper eyelid ; tympanum more or less distinct, 

 about half the width of the eye. Pingers rather slender, first not 

 extending as far as second ; toes moderate, tips of fingers and toes 

 dilated into small disks ; subarticular tubercles distinct ; two small 

 metatarsal tubercles. The hind limb being carried forwards along 

 the body, the tarso-metatarsal articulation marks the eye or the tip 

 of the snout. Skin of back miniitely granulate ; a more or less 

 distinct fold from the eye to the shoulder. Upper surface of head 

 and back uniform light olive, sides and lower surfaces black, the two 

 colours sharply defined ; limbs dark olive, indistinctly barred with 

 darker ; a light line on the upper lip, extending to the base of the 

 arm ; lower surfaces spotted with light olive. 



Madagascar. 



a-d. 5 & hgr. Mohambo. 



2. Mantella ebenaui. 

 Dendrobates ebenaui, Boettg. Zuol. Anz. 1880, p. 281. 



Head short, subtriangular ; tympanum half the size of the eye. 

 First and second fingers equal ; tips of fingers and toes dilated into 

 very small disks ; siibarticular tubercles well developed ; two meta- 

 tarsal tubercles. Skin of back minutely granulate. Above with a 

 broad light zone — silvery in the male, greenish golden in the 

 female, — well defined from the black colour of the sides ; limbs dark 

 grey, with rather indistinct black spots and stripes ; a silvery- white 

 line round the upper lip, extending to the base of the arm ; beneath 

 black, white-spotted. 



Nossi Be, 



3. Mantella madagascariensis. 



Dendrobates madagascariensis, Grandid. I. c. p. 10. 



Skin finely shagreened. Male uniform bluish black ; belly with 

 light blue spots ; thighs and inner side of legs beautiful red. 

 Female deep black, with a light-green spot at the base and in front 



