THE LIZARDS OF THE GENUS TACHYDROMUS. 



211 



shields and the median collar-plate, anterior granular and smooth, posterior enlarged, 

 imbricate, smooth or faintly keeled, and merging gradually into the collar, which is 

 composed of 8 to n rounded or obtusely pointed plates, the median smooth, the 

 outer feebly keeled. 



Dorsal plates obtusely pointed or rounded behind, in 6 longitudinal series, with i 

 or 2 smaller plates on the median line, or in 8 series in front and 6 behind ; sides 

 with one upper and 3 or 4 lower series of keeled scales and a median granular area. 

 Ventral plates in 8 longitudinal and 22 to 28 transverse series, the outer pointed and 

 feebly keeled, the others smooth, broader than long and shaped as in Lacerta vivipara 

 30 to 40 plates and scales round the middle of the body. Prseanal plate large, 

 smooth, entire (males) or longitudinally divided or semidivided (females), bordered 

 by one semicircle of small plates. 



Upper surface of limbs with rhombic keeled scales, much smaller than the 

 dorsals. 3 femoral pores on each side.' Subdigital lamellae single or partly single 

 and partly divided, 19 to 23 under the fourth toe. 



Caudal scales strongly keeled, pointed or shortly mucronate, in somewhat longer 

 and shorter whorls alternately, the fourth or fifth of which contains 16 to 20 scales. 

 The scaling of the regenerated tail similar to that of Lacerta vivipara. 



Brown or olive-grey above, uniform or with irregular dark brown spots ; sides with 

 a broad dark brown or black band, the upper border of which may show a series of 

 indentations ; a dark streak on the canthus rostralis ; usually a more or less distinct 

 light, dark-edged streak from the lower eyelid to the shoulder, passing through the 

 lower part of the ear-opening, sometimes continued as a series of spots to the base of 

 the hind limb. Lower parts yellowish or greenish white. 



Measurements, in millimetres. 







1. 



2. 







4- 



From end of suout to vent 







55 



53 



66 



65 



,, ,, ,, ,. ,, fore limb 







20 



x 9 



— 



21 



Head .. 







12 



12 



13 



14 



Width of head 







8 



8 



9 



9 



Depth of head 







6 



6 



— 



7 



Fore limb 







19 



J 9 



20 



20 



Hind limb 







25 



27 



27 



27 



Foot 







12 



14 



— 



14 



Tail .. 







r.17 



— 



— 



— 



1. f , Chabarovka. 2. d 1 , Seoul. 3. 9 , Kasakewicha (type). 4. 9 



, Chabarovka 







Particulars of specimens examined.' 1 













1. 



2. 3. 4. 



5- 



6. 



7- 



8. 



9- 



J , Chabarovka, Ussuri . . . . 55 



35 7 8 



26 



8 



22 



3 



20 



„ „ ,, ■■ 54 



35 7 § 



25 



10 



22 



3 



21 



2,- „ •• -.65 



40 8 8 



28 



9 



24 



3 



23 



•• 65 



33 7 8 



27 



9 



19 



3 



22 



cf , Seoul, Corea . . . . • • 53 



35 7 8 



24 



10 



21 







23 



9 , Corea . . . . . . 50 



30 8 8 



22 



10 



22 



3 



x 9 



! A female from Chabarovka shows an ill-defined fourth pore on the right side. 



* In addition to these I have examined the type, a female from Kasakewicha, on the Amoor, preserved in the 

 Berlin Museum. 



