89. nTcsiGi.EXA. 211 



b. Hgr. 5 (V. 168 ; C. 39). Mezquital del Oro, Dr. A. C. Biiller [C.]. 



c. $ (V. 162; C. 51). Jalisco. ' F. D. Godman, Esq. [P.]. 



4. Hypsiglena discolor. 



Leptodira discolor, (iunth. Pruc. Zool. Sor. 1860, p. 317. 

 Hypsiglena discolor, Cope, Bull. U.S. Nat. Miis. no. 32, 1887, p. 78 ; 

 'Giinth. Biol. C.-Am., Rept. p. 137, pi. xlix. fig. 1 (1894). 



Rostral nearly twice as broad as deep, just visible from above : 

 internasals shorter than the prsefrontals ; frontal slightly longer 

 than broad ; loreal as long as deep or slightly longer than deep ; one 

 praj- and two postoculars ; temporals 1 + 2; seven or eight upper 

 labials, third and fourth or fourth and fifth entering the eye ; anterior 

 chin-shields as long as or a little shorter than the posterior. Scales 

 in 19 rows. Yentrals 173-180; anal divided; subcaudals 85-89. 

 Above with blackish cross bars separated by pale yellowish-brown 

 interspaces; upper surface of head dark, nape yellowish; labials 

 yellowish with blackish sutures : uniform yellowish white beneath. 



Total length 560 mUlim. ; tail 155. 



Mexico. 

 rt-6. J (V. 180, 173; C. 85, 89). Oaxaca. M. Sall6 [0.]. (Types.) 



5. Hypsiglena latifasciata. 



Hypsiglena latifasciata, Giinth. Biol. C.-Am., Rept, p. 138, pi. xlix. 

 fig. 2 (1894). 



Uostral nearly thrice as broad as deep, scarcely visible from 

 above ; internasals a little shorter than the prefrontals ; frontal 

 nearly twice as long as broad, with concave sides ; loreal deeper 

 than long ; one praeocular, with a small subocular below it ; two 

 postoculars; temporals l-|-2; eight upper labials, fourth and fifth 

 entering the eye ; anterior chin-shields shorter than the posterior. 

 Scales in 21 rows. Yentrals 186 ; anal divided ; subcaudals circa 

 80 (end of tail absent in the specimen). Dark brown above, with 

 ten widely separated whitish cross bands ; head whitish, spotted 

 ■with brown, except on the occiput ; beneath dirty white. 



Total length 350 mUlim. 



South Mexico, 

 a. $ (V. 186; C.?). S.Mexico. F. D. Godman, Esq. [P.]. (Type.) 



6. Hypsiglena ornata. 



Comastes ornatus, Bocourt, Bull. Soc. Philoni. (7) viii. 1884, p. 141. 

 Hypsiglena ornata. Cope, Bull. U.S. Nat. Mus. no. 32, 1887, p. 78. 



Scaling as in H. torquata, but body feebly compressed, ventrals and 

 subcaudals more numerous, rostral smaller, and eye larger. Eight 

 upper labials, fourth and fifth entering the eye. Ventrals 185-189 ; 

 subcaudals 84-93. Yellowish above, with a dorsal series of large 

 brown spots, and smaller spots alternating with them on the sides. 



Total length 260 niillim. ; tail 87. 



Isthmus of Darien. 



