THE LIZARDS OF THE GENUS TACHYDROMUS. 219 
Pepe 4et. 5c On Fan Os O: 
&, Kuatun nie ns oe Gomes5 55.0. 20° Gr 2226 
5 3 ie oe is Gomme omOe Oo 2) 12 = 2Aneateees 
56 xp is ap ins Sins OM OMeOu 27am LO 250 meme 20) 
2 ~ be ar =F: TOMS SeOl (On 25) Che 20) hees 
sp " a a oe Gi “Sets, ss a eee ay 5 
- ‘: sr a =< 67 448. 828. to 125 26 
Table as on p. 212. 
Habitat. China along the Yang-tse-Kiang, north-west to the Province of Kansu, 
south-east to Fokien. 
With an insufficient material, in 1887, I unfortunately united this species with 
T. tachyvdromoides, from which it is perfectly distinct, differing chiefly in the number 
of chin-shields and of femoral pores, as well as in the constantly keeled ventral 
plates. The first two characters are not known to suffer any exceptions in the two 
species here compared, although large series have been examined by me and by 
others; and this is very remarkable considering that the number of chin-shields cer- | 
tainly varies in T. smaragdinus and T. sexlineatus, as observed by Van Denburgh, by 
Stoliczka, and by Annandale, whilst specimens with either one or two femoral pores 
occur in T. formosanus and T. sexlineatus. 
5. Tachydromus formosanus, Blgr. 
Tachydromus formosanus, Bouleng. Ann. and Mag. N.H. (6) xiv, 1894, p. 462; Stejneg. Herp. 
Japan, p. 235 (1907) ; Van Denb. Proc. Calif. Ac. (4) tli, 1912, p. 245. 
Takydromus septentrionalis, part., Stejneg. op. cit., p. 232. 
Takydromus steynegert, Van Denb. t.c., p. 243. 
Body not or but slightly depressed. Head feebly convex, 13 to 1? times as long 
as broad, its depth equal to the distance between the anterior corner or the centre 
of the eye and the tympanum, its length 32 to 4 times in length to vent in males, 
4 to 44 times in females ; snout pointed, with strong canthus and nearly vertical 
loreal region, as long as the postocular part of the head. Pileus 2 to 2} times as 
long as broad. Neck narrower than the head. The hind limb reaches the elbow in 
females, the axil or the shoulder in males; foot r to 1} times as long as the head. 
Tail 2 to 32 times as long as head and body. 
Nostril pierced between 3 shields. Rostral not entering the nostril, rarely in 
contact with the frontonasal,' which is as long as broad or a little broader, or 
longer than broad and in contact with the frontal;* praefrontals usually forming a 
median suture, or separated by an azygos shield ;* frontal as long as its distance 
from the end of the snout, 14 to 1? times as long as broad, a little narrower behind 
than in front ; parietals 1} to 14 times as long as broad; interparietal 14 to 2 times 
as long as broad ; occipital small, much shorter than the interparietal, often separated 
from it by the parietals meeting in the middle. 4 supraoculars, first very small, 
| In 27 specimens out of 283 examined by Van Denburgh (about 10 p.c.). 
2 In a male from Taipeh and in another from Punkiho. 
3 In a female from Punkiho. 
