226 SPHAERODACTYLUS. 



h' Snout rounded, head short (normal), no dis- 



tinrtive colour-pattern argivus 



e' Dorsals about 10 or 12 in standard distance. 



f Dorsals about 12, supranasals small, separated usually 



by four scales about their own size nigra punetalus 



P Supranasals large, normal, separated by one or two 

 small scales. 



g' Heavily striped along back and sides, dorsal stripe 



bifurcating on head bucrgeri 



g' Spotted not striped. 



h' A creseentic groove on each side of rostral 



median groove argus 



h' No lateral grooves on rostral corticolus 



c' Dorsals keeled and larger, no differentiated middorsal zone, 

 d' Very large, four to seven scales in standard distance. 



e' Only four in standard distance, head swollen; but body 



small with collar, light coloured gilvitorques 



e' Five or more scales in standard distance. 



f ' Five scales, species very large, strikingly cross-banded . richardsonii 

 P More than five scales. 



g' Scales of chest keeled, of belly smooth .... macrolepis 

 h' Dorsals weakly keeled 6-7 in standard dis- 

 tance eisiil 



h^ Dorsals strongly keeled, 7 in standard dis- 

 tance notalus 



a' Scales keeled and imbricate but the scales of middorsal region smaller than 

 those of flanks, 

 b' A middorsal zone of tiny granules. 



c' Large dorsals about 6 in standard distance. 



d' The large keeled tectiform scales reaching far forward on neck, 



nearly to head anthracimis 



d- The large keeled dorsals not reaching so far. 



e' Reaching just to the lower neck copei 



e^ Reaching to scapular region only scaber 



c' Large dorsals more than 6 in standard distance. 



d' Large dorsals about 7-8 in standard distance ventrals weakly 



keeled faniaslicue 



d? Large dorsals about 9-10 in standard distance. 



e' Dorsals rather weakly keeled, about in standard distance, 



granular zone only well developed posteriorly, sjiotted . . pidus 

 e^ Dorsals strongly keeled about 10 in standard distance. 



f Colour uniform except for dorsals scales having dark 



edgings, giving reticulate appearance becH 



P Colour mottled or cross-barred, loreals excessively small spulator 

 b^ Middorsal zone composed of scales more or less distinctly reduced in size 

 but not conspicuously granular as in b'. 



c' Largest dorsals about 7 to 13 in standard distance. 



d' About 12-13 of the larger .scales in standard distance. 



e' Scales of belly keeled . . . .• microlepis 



e- Scales of belly smooth. 



P Scales of upper (anterior) part of nock keeled, a very 

 few in 9 , more in cf ; latter uniform iron-gray, former 



pepper and salt colour, young cross-banded eleganiulus 



P Most of the neck scales strongly keeled; a bifurcating 



light mark at root of tail vincenti 



d' Dorsals and laterals rather uneven in size, about 7 of largest 

 laterals and 10-11 middursals in standard distance; a few small 

 scales intermixed with the largest monilifcr 



