BATRACIIIANS FROM WEST AFRICA \C)o 



nodaciylus, from E. Africa and A. horridus from Madagascar, 

 are only known to me from descriptions and figm-es. 



Synopsis of the Species of the Genus Ai^throleptis. 



I. - Tympanum very distinct; a single metatarsal tubercle; no tarsal 



tubercle; toes free or with a slight rudiment of web; third finger 

 much elongate in the males. 



A. Tibio-tarsal articulation not reaching 

 beyond the tympanum; tips of fin- 

 gers and toes slightly dilated. 



1. First finger as long as second. 

 Metatarsal tubercle much shorter than 



inner toe \. A. loahlbergii. Smith, 1849. 



Metatarsal tubercle as long as the 

 inner toe 2. A. ichytii, Blgr. 1897. 



2. First finger shorter than second 3. A. xenochirus, Blgr. 1905. 



B. Tibio-tarsal articulation reaching 

 the eye or between the eye and 

 the tip of the snout. 



1. First finger as long as second. 



Tips of fingers and toes not dilated. 4. A. stenodactylus , Pfeff. 1893. 



Tips of fingers and toes feebly dilated ; 

 metatarsal tubercle as long as inner toe 5. A. variabilis, Matsch. 1893. 



Tips of fingers and toes feebly dilated; 

 metatarsal tubercle shorter than inner 



toe 6. A. poecilonotusy Peters. 1863. 



2. First finger much shorter than 

 second; tips of fingers and toes rather 



strongly dilated 7. A. taeniaius, Blgr. 1906. 



II. - Tympanum rather indistinct ; a single 

 metatarsal tubercle ; no tarsal tubercle; 

 head and body rough with spine-like 



warts 8. A. horridus , Bttgr. 1880. 



III. - Tympanum rather indistinct or hidden; 

 two small metatarsal tubercles and a 

 thiixl tubercle on the tareus; toes with 

 at least a very distinct rudiment of 

 web; third finger not longer in the 

 male than in the female. 



A. Toes not one fourth webbed. 



I. No conical or spine-like tubercle on 

 the upper eyelid. 



Tips of fingers and toes slightly 

 swollen; inner metatarsal tubercle e- 

 qually distant from the outer and from 



the tarsal tubercle 9. A. minutus, Blgr. 1895. 



