132 sTsTKMATfc LIST Axp syNOxyjMy. 



O P H I D I A— Continued. 



BOAEIDAE 8 



Bo'tdac Bonap., 1831, Saggio, — 1840, Roy. Acad. Turin. 

 Bo.v 



Liun., 1758, Systoma, I, 214, — ITtiO, 8yst,, I, 373 (Part); Gray, ISi"), 

 Ann. I'liil., 209; Waglur, 1830, Syst, Ampli., 168; D. & B., 1844, 

 Erp., VI, 500. 



Bo.V I.MPEU.VTOR 8 



Daudin, 1803, Kept., V, 150; I). & I!., 1844, Erj.., VI, 519; Gray, 1849, 

 Cat. Snake.s, 101 ; Jan, 1857, Ind. Sist. Itett. Mus. Milan, 44, — 18G3, 

 Sist, 23, — 1864, Icon., livr. 0, pi. 1, — 1865, Icon., Text, 81 ; Sumi- 

 chrast, 1880, Bull. See. Zoiil. de France, 179. 



Central America and Mexico. 



Bo.\ CON.STKICTOR 



Boas comtrictor Linn., 1754, Miis. Ad. Fridr., 38. Boa covslridor Linn., 

 1758, Syat., L 373; Schneider, 1801, Amph., II, 247; Filz., 1826, Neue 

 Class., 54; Wagl., 1830, Syst., 163 ; D. & B., 1844, Erp., VI, 507 ; Gray, 

 1849, Cat. Sn., 100; Jan, 1864, Icon., livr. 5, pi. 2, f. 2. 



Brazil to Central America. 



Var. isTUJiic.v 9 



Central America. 

 Boa ME.vic'ANA (Eapp) 10 



Bon dii'iniloquax var. mexkcma Jan, 1863, Sist., 23, — 1864, Icon., livr. 

 5, pi. 4, f. 1, — 1865, Icon., Text, 82. 



Chilabothrus 



Dum. Bibr., 1844, Erp., VI, 562. 



Body stout, slightly compressed; neck smaller; head broad, de- 

 pressed; tail rather short. Nostrils lateral, anterior. Eyes small, 

 pupil vertical. Anterior teeth larger. Labials imbricate, without 

 pits. Crown-shields large, irregular. Scales smooth, flat. Subcaudals 

 simple. Claws distinct. 



Ciiii;ABOTnnus inornatus 



I). & B.. 1844, Erp., VL 563; Jan, 1S63, Sist., 24, — 1864, Icon., livr. 6, 



pi. 5. f. 1. Boa inornata Reinh., 1843, Dansk. Vid. Selsk., pi. 21-23. 



Biidy stout, slightly compressed; head distinct, crown flat, snout 

 broad; tail short, prehensile, rather thick at the extremity. Rostral 

 largo, i)entangular, wider at the suture with the labial and nasal. 

 Nasal <livided in three— ujiper portions largest and meeting between 

 internasals and rostral, or in two— anterior part much larger and reach- 

 ing from the anterior labial to the opposite nasal. Internasals and 

 ; prefrontals large, subeqnal or snlidividcd. Frdotal and s\iiiraciliaries 



3 large, the former often dissected. I'arietals irregular, bceuniing scale- 



like posteriorly. Loreal large, elongate, sometimes supplemented by 

 small sliiclds. Anteoculars two, U]iiier larger. Postoctilars usually 

 four. Temporals scaledike. Labials commonly eleven, the sixth 

 touching the eye. Infralabials about thirteen, anterior four or five 

 l)rciad, anterior pair meeting licliiMd iIk' mental. Mental fiirriiw deep. 

 Siil)mcntals small. Scales smoiitli, Hat, in .'16 to 40 rows, outer and 



