Tacliydromus. 141 



1. 2. 3. 4. 5. 6. 7. 8. 9. 



cJ Kiu Kiang Mts. . . . 57 38 6 8 27 11 26 1 23 



„ Kuatun 69 35 5 8 26 11 22 1 26 



. 69 38 6 8 28 12 24 1 25 



68 39 6 8 27 10 25 1 29 



. 70 38 6 8 28 11 26 1 28 



. 67 38 8 8 28 11 23 1 25 



67 44 8 8 28 10 25 1 26 



Habitat. — China along the Yangtse Kiang, north-west to the 

 Province of Kansu, south-east to Fokien. 



With an insufficient material before me, in 1887, I unfortunately 

 united this species with the Japanese T. tachydromoides, from which 

 it is perfectly distinct, differing chiefly in the number of chin-shields 

 and of femoral pores, and in the constantly keeled ventral shields. 

 These characters are not known to suffer any exceptions in the two 

 species here compared, although larger series have been examined by 

 me and others ; and this is remarkable considering that the number 

 of chin-shields certainly varies between 3 and 4 pairs in T. smarag- 

 dinus and T. sexlineatus, as observed by Van Denburgh, by Stoliczka, 

 and by Annandale, whilst specimens with one or with two femoral 

 pores occur in T. formosanus and T. sexlineatug. 



5. TACHYDEOMUS FOEMOSANUS. 



Tachydromus formosanus, Bouleng. Ann. & Mag. N. H. (6) xiv, 

 1894, p. 462 ; Stejneger, Herp. Japan, p. 236 (1907) ; Van Denburgh, 

 Proc. Calif. Ac. (4) iii, 1912, p. 245 ; Bouleng. Mem. As. Soc. Beng. 

 V, 1917, p. 219, pi. xlvi, fig. 4. 



Tahydromus septentrionalis, part., Stejneger, op. cit. p. 232. 



Tahydromus stejnegeri, Van Denburgh, t.c. p. 243. 



Body not or but slightly depressed. Head feebly convex, 1| 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 

 3-| to 4 times in length to vent in males, 4 to 4J 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 2-1- 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 1 to li 

 times as long as head. Tail 2 to 34 times as long as head and body. 



Nostril pierced between three shields. Eostral not entering the 



