132 SYSTEM A TIC LIST AND SYNONYMY. 



OP HID I A— Continued. 



BOAEIDAE S 



Boidae Bonap., L831, Saggio, — 1S40, Roy. Acad. Turin. 



Boa 



Linn., 1758, Systema, I, 214, — 1766, Syst., I, 373 (Part); Cray, L825, 

 Ann. Phil., 209; Wagler, 1830, Syst. Amph., 168; D. & B., 1844, 

 Erp., VI, 500. 



Boa imperatoe 8 



Daudin, L803, Rept., V, 150; I>. & B., 1844, Erp., VI, 519; Gray, 1849, 

 Cat. Snakes, 101; Jan, 1857, Ind. Sist Rett Mus. Milan, 44, — 18G3, 

 Sist., 23, — 1864, Icon., livr. 6, pi. 1, — 1865, Icon., r IY.\t, 81 ; Sumi- 

 chrast, 1880, Bull. Soc. Zool. de France, 179. 



Central America and Mexico. 



Boa constrictor 



Bona constrictor Linn., 1754, Mus. Ail. Fridr., 38. Boa constrictor Linn., 

 1758, Syst., T, 373; Schneider, 1801, Amph., II, 247; Fitz., 1826, Neue 

 Class., 54; Wagl., 1830, Syst., 168; D. & B., 1844, Erp., VI, 507; Cray, 

 1849, Cat Sn., 100; Jan, 1864, [con., livr. 5, pL 2, f. 2. 



Brazil to Central America. 



Var. istiimk'a «J 



Central America. 



Boa mexhaxa (Rapp) 1U 



Boa diviniloquax var. mexicana Jan, 1863, Sist., 23, — 1804, Icon., livr. 

 5, pi. 4, i. 1, — 1865, Ccon., Text, 82. 



CHILABOTIIRI'S 



Dum. Bibr., 1841, Erp., VI, 5(12. 



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, (laws distinct. 



Chilabothrus INORNATUS 



D. & B., 1844, Erp., VI, 563; Jan, 1863, Sist., 24, — 1864, Icon., livr. 6, 



pi. 5, f. l. Boa inornata Reinh., is 13, Dansk. Vid. Selsk., pi. 21-23. 



Body stout, slightly compressed; head distinct, crown fiat, snout 

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

 large, pentangular, wider at the suture with the labial and nasal. 

 Nasal divided in three— upper 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, subequal or subdivided. Frontal and supraciliaries 

 large, the former often dissected. Parietals irregular, becoming scale- 

 like posteriorly. Loreal large, elongate, sometimes supplemented by 

 small shields. Anteoculars two, upper larger. Postoculars usually 

 four. Temporals scale-like. Labials commonly eleven, the sixth 

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

 broad, anterior pair meeting behind the mental. Mental furrow deep. 

 Submentals small. Scales smooth, Hat. in 36 to 40 rows, outer and 



