16 ARKIV FÖR ZOOLOGI. BAND 3. N:0 12. 



nose 6 mm., eye 4,.-i mm., tympanum 2 mm., breadth of head 

 11 mm. 



To judge from the descriptlons, the specimen seems to 

 agree most with Hyla phrynoderma Boul. (Ann, Mus. Civ. 

 Storia Nat. Gen o va Ser. 2. Vol. 7, p. 248) and with Hyla 

 verriicigera Werner (Zool. bot. Gesellsch. Wien 51 p. 601) 

 and the related specimens of this one, Hyla hucMeyi Gntr. and 

 Hyla lepreurii Boul. (Cat. of. Batr. pp. 361, 362). 



From the first-mentioned species it differs by the situa- 

 tion of the vomerine teeth, the size of the choanse, of the 

 interorbital space, and of the tympanum, longer and more 

 slender hind limbs, as well as by partly different colour. H. 

 verrucigera is said to have another arrangement of the vome- 

 rine teeth, round nose, hind limbs which do not reach the tip 

 of the snout, the belly alone being granulate and the colour 

 uniform. Hyla buckleyi and H. lepreurii, on the other hand. 

 have smaller interorbital space, smaller tympanum, as well 

 as another arrangement of the vomerine teeth and different 

 colour. 



Hyla aluminiata n. sp. 



Plate 1. fi^-. o. o a. 3 1). 



Eight specimens (among these one, not fully developed) 

 from San Fermin, Bolivia, June— August 1904 and Chaquimayo, 

 Peru, Nov.— Dec. 1904. Holmgren. 



Habit vcry slender. Tongue heart-shaped. Vomerine 

 teeth in two are hed series between and behind the large 

 choanse. Nose short, the tip truncated, as long as the dia- 

 meter of the eye. Nostrils near the tip of the nose. Tym- 

 panum hidden, but its margins visible in the largest specimen, 

 larger than half the diameter of the eye and considerably 

 larger than the disks of the fingers and the toes. Three outer 

 fingers with a short web at the base, the innermost free. 

 Toes -/.s webbed. The tibio-tarsal articulation reaches between 

 the eye and the tip of the snout. Skin smooth above, on 

 the chin, and on the throat, granular on the belly and under 

 the thighs. 



The ground-colour above is bluish-white with small oval 

 black spöts, sharply defined. The front part of the head is 



