140 ON THE BATRACHIA AND REPTILIA OF COSTA RICA. 



Loreal longer than high ; a narrow lateral and broad (sometimes divided) dorsal 



band; the included band reaching side of muzzle; urosteges 90-108. 



R. tceniata* 

 Sides with dark border above ; an oblique yellow band from eye crossing the last 



labial ; urosteges 60. R. lachrymans.-\ 



A dorsal band ; a yellow band encircling head on labials and nape ; a yellow band 



through orbit to nape. R. loreata.% 



oca. Two preoculars. 

 Sides dark above, with a superior pale border, which becomes a yellow band on 



each side of head to orbit ; no dorsal band ; lips unspotted. R. ignita.^ 



Sides dark above, with superior pale border ; two yellow spots on each side of 



occiput and nape; urosteges 90. R. decorata.\\ 



97. Rhadin^ea serperastra, Cope, Proceed. Acad. Philada. 1871, p. 212. 



This species agrees with those regarded as typical, when the genus was first 

 defined (see Proc. Academy N. Sci. 1868, p. 132). That is, the teeth are equal, 

 the scales smooth and poreless, the anal plate divided, the nasals two, loreal one, 

 and oculars 1-2. 



In this serpent the scales are in nineteen series. Superior labials eight, not 

 elevated, fourth and fifth bounding eye. Temporals 1-2-3. Internasals trans- 

 verse, narrow ; postnasal larger than prenasal. Frontal wide, superciliary suture 

 shorter than anterior, total length exceeding that of common parietal suture. 

 Loreal square; geneials subequal. Gastrosteges 164; anal 2, urosteges 78. 



Dark brown with six longitudinal yellow or white lines, of which the first and 

 second are brightest. The second dark band is wider than the first and vertebral ; 

 and like the third is partly divided by a faint white line. Another white line on 

 each side is produced by a series of dark spots on the ends of the gastrosteges. 

 Labial plates black, yellow spotted. Head dark brown above with a pale shade 

 across frontal and two just behind parietals. Chin and belly yellowish. 



Rostral small, low ; postnasal higher than long ; loreal as high as long. Superior labials eight, 

 seventh highest; temporals 1-1. Inferior labials ten, sixth largest, in contact with middle of 

 postgeneials. Scales poreless. Gastrosteges 177 ; anal divided ; urosteges 91. 



Color above fulvous, below fulvous-yellow. The three brown bands extend from the end of 

 the nose to near the end of the tail ; the lateral involves the fourth and the half of each adjacent 

 row of scales, and is black edged ; the dorsal is three and two half scales wide, and is also black 

 edged. The brown is paler on top of the head, and the ground color is a narrow yellow band to 

 the eye. Lips yellow, like the lower surfaces unspotted. 



From Orizaba, Vera Cruz ; obtained by Dr. Sumichrast; No. 7075 Mus. Smithsonian. 



* Dromicus, Peters. f Lygophis, Cope. 



X Dromicus, Gunther. § Dromicus, Cope. 



j| Coronella, Gunther. 



