144 Lacertida?. 



Partiodars of Sj^ecimens Exantinecl. 



$ Taiwanfoo (tyjie) . 



(7 Central Formosa (type) 



-f >) >> • 



$ Taipeh (co-type of T. stejnegeri) . 



„ Tainan, 



„ Punkiho ...... 



? „ 



„ Kansliirei* ..... 

 „ Tamsui 



Habitat. — Formosa and Pescadores Islands. 



T. formosamis is very closely allied to T. septentrionalis, differing- iu 

 the presence of 6 series of large plates along the back instead of 4, 

 and by the frequent presence of 10 series of ventral plates instead of 

 8. The size is smaller, and 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 too 

 inconstant to wari'ant specific distinction. 



6. TACHYDEOMUS KHASIENSIS. 



Tachydroinus sexlineatus, j)art., Bouleng. Cat. Liz. iii. p. 4 (1887), 

 and Faun. Ind., Eept. p. 169 (1890) ; Giinth. Ann. & Mag. N. H. ((>) 

 i, 1888, p. 167. 



Tachydroinus khasiensis, Bouleng. Mem. As. Soc. Beng. v, 1917, 

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



Body scarcely dej^ressed. Head about If times as long as broad, 

 its depth ec^ual to the distance between the centre of the eye and the 

 tympanum, its length 4 to 4| times in length to vent in males, 4^ to 

 5 times in females ; snout pointed, with sharp canthus 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 thv name of T. stejnegeri. 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. 



