34 



MR. G. A. BOULENGER ON LIZAEDS 



Habitat. South-Eastern and Central Russia in Europe East of the Dnieper, Trans- 

 caucasia and Armenia, Western Siberia and Central Asia Eastwards to the Yenisei 

 and the Altai and Tian Shan Mountains. Ascends the Caucasus to the altitude of 

 2000 metres. 



The forms into which JL. agilis is divided may be defined as follows : — 



Forma typica. Usually 1 or 2 postnasals and 2 anterior loreals ; suture between the 

 nasals very short, rarely half the length of the frontonasal, which is narrower than the 

 internarial space (with rare exceptions) ; 33 to 47 scales across the body, usually 

 36 to 40 ; prseanal plate large, bordered by one, rarely by two semicircles of scales ; 

 8 to 17 femoral pores on each side, usually 11 to 14 ; light vertebral streak never 

 continuous in the adult. 



Var. spinalis. Usually 1 postnasal and 1 anterior loreal ; suture between the nasals 

 very short ; frontonasal narrower than the internarial space ; 32 to 35 scales across 



