Tachydroinns. 143 



series, obtusely pointed, strongly keeled and shortly mucronate. 33 

 to 38 plates and scales round the middle of the body. Preaual plate 

 moderately large, sometimes not broader than long, smooth or feebly 

 bicarinate, rarely longitudinally bisected,* with smaller keeled plates 

 in front and on the sides. 



Upper surface of limbs with rhombic keeled scales and granules. 

 One or two femoral pores on each side.t 24 to 29 lamellar scales 

 under the fourth toe. 



Caudal scales strongly keeled and shortly mucronate, the keels 

 forming four very strong ridges on the upper surface of the basal 

 part ; the whorls nearly equal in length, the fourth or fifth containing 

 14 to 18 scales. 



Brownish olive above, sometimes with darker spots which may form 

 lines along the keels of the dorsal plates ; often a yellowish or greenish 

 white dorsolateral streak, starting from the superciliary edge ; a dark 

 streak from the nostril to the eye and a dark band on the temple and 

 side of neck, often continued on the body, where it may be spotted 

 with greenish white ; a light streak from the lower eyelid, through 

 the lower part of the ear-opening, to the shoulder, sometimes continued 

 on the side of the body. A black streak on the hinder side of the 

 thigh. Lower parts yellowish or greenish white. 



Measurements (in millimetres) : 



1. 9 , type, Taiwanfoo. 2. $ , type, C. Formosa. 3. 9 , type, C. 

 Formosa. 4. ^J, Taipeh, co-type of T. stejnegeri. 5. ^, Punkiho. 

 6. Q , Kanshirei. 



* In one of the types from C. Formosa. — Two keeled plates in 3 specimens 

 and two smooth plates in 1 of T. stejnegeri, two keeled plates in 4 specimens 

 and two smooth plates in 2 of T. formosanus (out of 178 specimens) according 

 to Van Denburgh. 



t Van Denburgh found two pores on one side in one specimen referred by him 

 to T. stejnegeri ; the specimens with a single pore are (with 9 exceptions out of 

 284 specimens) regarded as typical T. formosanus. 



