260 



MR. G. A. BOULENGER OX MADAGASCAR 



Toes \ webbed ; inner metatarsal tubercle strong 

 and prominent, compressed, % to f length of 



inner toe ; no dorso-lateral fold 31. redimitus Blgr. 1889. 



b. Tibio-tarsal articulation reaching beyond tip of snout; tibia 4| to 

 5 times as long as broad, 1| to If times in length from snout to vent ; 

 loreal region oblique. 



Toes uearlj' entirely webbed ; inner metatarsal 



tubercle § length of inner toe ; tj'mpanum ^ to 



f diameter of eye ; a pair of inwardly curved 



glandular folds on the anterior third of the back, 



from the upper ej^elids ; heel with a dermal pro- 

 cess or spur 31. luteus Meth. & Hew. 1913. 



Toes \ to f webbed ; inner metatarsal tubercle \ to 



f length of inner toe ; tympanum \ to \ diameter 



of eye ; a curved glandular fold on each side 



from the upper eyelid to between the shoulders, 



followed by a straight fold 31. pliciferus Blgr. 1882. 



Toes \ webbed ; inner metatarsal tubercle f to f 

 length of inner toe ; tympanum f to f diameter 

 of eye ; upper parts rough with prominent glan- 

 dular folds and tubercles; heel with a dermal 



process or spur 31. asper Blgr. 1882. 



II. Glandular dorso-lateral fold extending from 

 behind the eye to the hip ; loreal region ver- 

 tical ; tympanum f to once diameter of eye; 

 discs of fingers and toes rather large ; tibio- 

 tarsal articulation reaching tip of snout or a 

 little beyond ; tibia 4^ to 5 times as long as 

 broad, If to If times in length from snout to 



vent ; toes | webbed ; belly granulate behind. 31. albofrenatus F. Mull. 1892*. 



Nothing is known of the development and larva? of these frogs, 

 but the eggs are remarkably large, measuring 5 mm. in diameter 

 in M. guttulatus ( $ 120 mm. from snout to vent), 3 mm. in 

 M. lugubris ( $ 50 mm.), 2 '5 mm. in M. betsileanus ( £ 33 mm.). 



Mantidactylus ambohimitombi, sp. n. 



Vomerine teeth in short transverse or oblique series behind the 

 level of the choanre, equidistant from the latter and from each 

 other. Head a little broader than long ; snout rounded, feebly 

 projecting beyond the mouth, with indistinct canthus and very 

 oblique, concave loreal region ; nostril equidistant from the eye 

 and from the end of the snout ; interorbital region as broad as or 

 a little narrower than the upper eyelid ; tympanum distinct, f to 

 f the diameter of the eye, 1 to l\ times its distance from the 

 latter. Fingers moderately long, first and second equal or first a 

 little the longer, the discs small, not very much larger than the 

 well-developed subarticular tubercles. Toes moderately long, 

 f webbed, the discs about as large as those of the fingers ; no 

 tarsal fold ; inner metatarsal tubercle oval, moderately promi- 

 nent, 1 to ^ the length of the inner toe; no outer tubercle. 

 Tibio-tarsal articulation reaching the eye or between the eye and 

 the nostril ; tibia 2\ to 3 times as long as broad, 14 to 2 times in 



* 3I.frenatus Boettg., 1913, is probably identical with this species, although the 

 hind limb is longer and the discs of the fingers and toes are described as very small. 



