210 G. A. BOULENGER ON 



in 21 to 28 transverse series ; 3 (rarely 4) pairs of 

 chin-shields ; collar more or less distinct ; head about 

 twice as long as broad ; tail 3 to 5 times length of 

 head and body . . . . . . 9. T. sexlineatus, Daud. 



Dorsal plates in 6 longitudinal series, ventrals in 30 

 transverse series ; 4 pairs of chin-shields ; no trace 

 of a collar ; head 2| times as long as broad ; tail 



2f times as long as head and body . . 10. T. haughtonianus t 



Jerd. 

 1. Tachydromus amurensis. 



Tachydromus amurensis, Peters, Sitzb. Ges. Naturf. Fr. Bed. 1881, p. 71 ; Bouleng. Cat. Liz., 

 iii, p. 6 (1887) ; Giinth. Ana. and Mag. N.H. (6) i, 1888, p. 169 ; Bouleng. Ann. and Mag. 

 N.H. (6) v, 1890, p. 137 ; Nikolsky, Herp. Ross., p. 92 (1905) ; Stejneg. Herp. Japan, p. 245 

 fig. (1907). 



Body feebly depressed. Head about ij times as long as broad, its depth equal 

 to the distance between the anterior corner of the eye and the tympanum, its 

 length 3f to 4 times in length to vent in males, % to 4§ times in females; snout 

 obtuse, with obtuse canthus, as long as or slightly shorter than the postocular part 

 of the head. Pileus if to 2 times as long as broad. Neck as broad as the head. 

 Limbs short; the hind limb reaches the elbow or the axil in males, barely the wrist 

 in females; foot as long as the head or slightly longer. Tail if to a little over 2 

 times the length of head and body. 



Nostril pierced between three shields. Rostral not touching the nostril, broadly 

 in contact with the frontonasal, which is broader than long and as broad as the in- 

 ternarial space ; prefrontals forming a median suture or separated by a small azygous 

 shield ; ! frontal as long as its distance from the end of the snout, \\ to i\ times 

 as long as broad, of nearly equal width throughout, or narrower behind than in 

 front ; parietal a little longer than broad (not more than ij), in contact with the upper 

 postocular and with 3 or 4 temporals ; interparietal a little longer than broad ; occi- 

 pital much shorter than the interparietal, its posterior border usually convex and 

 projecting beyond the parietals. 4 supraoculars, first very small, sometimes divided 

 into two, or in contact with the frontal, second and third equal or second the longer, 

 fourth small but larger than the first, sometimes not in contact with the fronto- 

 parietal; 2 4, rarely 3 or 5, superciliaries, first longest, all in contact with the 

 supraoculars, or with 2 or 3 granules between them. Nasal forming a suture with 

 the anterior loreal 3 above the small postnasal; posterior loreal longer than the 

 anterior ; 4 upper labials + anterior to the subocular, which is narrower beneath than 

 above, sometimes very slightly. Temporal scales small, smooth or feebly keeled ; tym- 

 panic shield present ; one or two enlarged upper temporals often present. 



4, rarely 5 5 , pairs of chin-shields, the two or three anterior meeting in the 

 middle ; 19 to 24 gular scales in a straight line between the symphysis of the chin- 



> I11 a male from Chabarovka. 2 I11 a female from Chabarovka. 



3 Which is divided into two in a male from Chabarovka. * 5 on one side in a male from Chabarovka. 



In a female from Chabarovka. 



