88 



PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 6S 



guislied from Z. dhwmmdes. One of 

 the specimens. No. 63414, is abnormal 

 in lacking the subpreocular on both 

 sides, otherwise the scalation in Mr. 

 Graham's series is normal and very 

 uniform. 



With the addition of the one oc- 

 curring in Formosa, which turns out to 

 be distinct,"' we have now three forms 

 of Zaocys with a single loreal, 16 scale 

 rows and keeled median dorsals as 

 follows : 



a\ Two (rarely four) meaian rows of dor- 

 sal scales keeled; subcaudals 96-119 



pairs. 



Z. dhumnades (Cantor). 

 (Southern Chiua: Fukien to Shanghai, 

 and Yangtse valley to Kiukiang.) 

 a". Six or four median rows of scales 

 keeled; subcaudals, 117-144 pairs. 

 b\ Subcaudals, 140-144; a yellow verte- 

 bral stripe on anterior half of body. 

 Z. oshimai Stejneger. 

 ( Formosa. ) 

 &-. Subcaudals, 117-137; posterior two- 

 thirds of body and tail with a 

 broad black band on each side. 



Z. nigromarginatus (Blyth). 

 (Himalayas to Burma and 

 western Szechwan.) 



12 



CO o^ 



M ZAOCYS OSHIMAI, new species.— 1907. Zaooys 

 dlHumiades Stejneger, Herp. Japan, Bull. U. S. 

 Nat Mus., No. 58, 1907, p. 352 (part, Formosa) 

 (not of Cantor 1842).— Oshima, Annot. Zool. 

 Japan., vol. 7, pt. 3, Mar., 1910, p. 195 (Shushu 

 Nan to, Formosa). , - ic 



Diagnosis.— A single loreal; dorsal scales in 16 

 rows, (four or ?) six median ones keeled; sul.- 

 caudals 140-144; coloration a yellow vertebral 

 stripe on two median scales from neck, and a 

 similar one on fifth and sixth scale rows, both dis- 

 appearing on posterior half of body. 



Tvne locaUUj. —Vrai, Island of Formosa. 

 Type.—V. S. Nat. Mus., No. 52267; Dr. Fred 

 Baker, collector; November 18, 1914. 



Scale formula.— Sixteen scale rows, 6 median 

 ones keeled ; 201 ventrals ; 2 anals ; 144 subcaudals ; 

 8 supralabials ; 2-2 oculars ; 2 + 2 temporals 



Remarks.— This form is closely related to /.. 

 dhumnades from the mainland opposite Formosa, 

 having the same color pattern. The scutellation, 

 however, is more like that of Z. nigromarginatus, 

 except that the number of subcaudals is even 

 greater than in the latter form. 



In three specimens recorded by Dr. M. Oshima, 

 in whose honor this snake is named, the ventrals 

 were 195-197 and subcaudals 140-143. One of the 

 specimens lacked the subpreocular, and another had 

 abnormal temporals. 



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