144 Lacertidit'. 



Piirflnihirs nf Specimens E.faitiineil. 



1. i. :i 4 5. n. 7. 8. 9. 



5 Taiwiinfoo (typo) -ll 30 H Id :32 10 23 2 24 



^ Central Formosa (tyi»>) ... 45 3.5 7 8 29 12 22 2 2.% 



{ .. 46 36 7 10 30 10 24 2 24 



...... 44 37 S 10 31 11 28 2 24 



41 3!S 7 10 30 11 29 2 24 



<? Taipeh (co-type of T. .sifJH(?f;en") . . 50 34 (i S 2S 11 26 1 29 

 „ Tainan, ,. .. . ■ 47 36 7 10 29 11 26 1 26 



„ Punkiho 45 35 7 in 27 11 20 1 25 



^ „ 32 34 7 10 32 12 25 1 25 



„ Kanshirei* 52 33 S 10 30 10 23 1 24 



„ Tamsui 44 37 8 H 30 12 25 1 24 



Habitat. — Formosa aud Pescadores Islands. 



T. formosanuf is very closely allied to T. sejjtentrionalis, dift'eriny in 

 the presence of 6 series of large jjlates along the l^ack instead of 4, 

 aud bv the frequent presence of 10 series of ventral plates instead of 

 8. The size is smaller, aud the green colour is absent from the sides. 

 I am convinced that Van Denburgh"s proposal to separate this species 

 into two, one with normally two femoral pores (T. formosanus), the 

 other with one (T. stejnegeri), is untenable, the general agreement being 

 too great and the supposed distinctive characters too slight and tiio 

 inconstant to warrant sijecific distinction. 



«. TACHYDEOMUS KHASIENSIS. 



Tachi/ilrotniis se.rlineiitiis, part., Bouleng. Cat. Liz. iii, p. 4 (1887), 

 and Faun. Ind.. Kept. p. 169 (1890) ; Grmth. Ann. ct Mag. N. H. (C>) 

 i, 1888, p. 167. 



Tachydromiis khasieiifii--, Bouleng. Mem. As. Soc. Beng. v, 1917, 

 p. 221, pi. xlvii, fig. 1. 



Body scarcely depressed. Head about IJ times as long as broad, 

 its depth ecjual to the distance between the centre of the eye and the 

 tympiauura, its length 4 to 4| times in length to vent in males, 4i to 

 5 times in females ; snout pointed, with sharp cauthus and nearly 

 vertical loreal region, as long as the postocular part of the head. 

 Pileus twice as long as broad. Neck narrower than the head. Hind 



* This specimen was received from the Museum of the California Academy 

 under the name of T. stepiegeri. Yet in his descriptions Van Denburgh refers 

 all the specimens from Kanshirei to T. formosanus, thus showing the uncertainty 

 in distinguishing the two supposed species. The author rightly observes that 

 unfortunately no one of the distinctive characters is absolutely constant in all 

 specimens. 



