252 PROCEEDINGS OF THE ACADEMY OP 



One specimen ? Dr. Wilson. 



One " Para. Col. Abert. 



Two " (young) Surinam. Mr. Wood. 



Two " (young) " Dr. Colhoun. 



Three of the young specimens have a pair of white clots on the occipital 

 plates, as in the Tropidonotes. The transverse, band-like disposition of the 

 small white C-like marks, apparent in specimens of this age, remains during 

 adult age in some, thus affording a transition to the 



Var. A. Gthr. With distinct transverse light bands. 

 One sp. Para. Col. Abert. 



113. L. breviceps nobis. Head short, not very distinct from the body 

 Plates of the head similar to those of L. cobella except that the occipital 

 plates are shorter ; the vertical is broader, its lateral borders measuring less 

 than the anterior ; the rostral is broader ; and there are but seven superior 

 labials, the third and fourth entering the orbit. The sixth superior labial 

 widens upwards, and supports nearly the whole length of the temporal. In 

 L. cobella the upper margin of this plate is shorter than the lower. Two 

 postoculars, both in contact with the first temporal. Second temporal large, 

 one or two other small ones. One preocular ; loral small. Eight inferior 

 labials, fifth largest, anterior part in contact with posterior geneials (sixth and 

 seventh in cobella). Scales in seventeen rows. Gastrosteges 154, a 

 bifid anal, urosteges 54 pair. Total length 17 in. 5 lines. Tail 3 in. 2 lin. 



Color above, a deep brown without a trace of the small white marks of the 

 cobella, becoming darker posteriorly, and reaching to the gastrosteges. 

 It is crossed by very indistinct darker bands, formed by a single dark scale in 

 every other longitudinal row. These bands are two or three scales apart, and 

 unite on the flanks, into the black transverse bands of the belly, which are 

 irregular and broad, almost excluding the yellow ground in some places. 

 One spec. Surinam. Dr. Hering. 



Obs. Comparison with our specimens ofL. cobella has induced us to 

 consider this distinct on account of : First, the comparative smallness of the 

 head ; second, the shortness of the head shields ; third, the less number of 

 labials ; fourth, the form of the sixth superior labial ; lastly, the color ; which, 

 however, is of but little importance considered alone. It recalls the genus 

 Helicops. 



114. L. Merremii Bum. and Bibr. L. miliaris, poecilogyrus et doliatus 

 Wagler. Coluber Merremii, poecilogyrus et doliatus Neuwied, Beitr. und Abbild. 

 Bras. Lief. 8. 



Var. A. Gthr. Cat. Brit. Mus. 44. 

 Three spec. S. America. ? 



Var. poecilogyrus Neuic. 1. c. 

 One sp. S. America. Capt. J. Jameson. 



Our specimen is evidently an adult. 



Var. sublineatus nobis. Olive brown, irregularly varied with black, 

 which forms posteriorly an irregular band on each side, as in L. reg i na e , 

 with a bright one above it. 

 One spec, (half grown) Bueno's Ayres. Mr. Kennedy. 



Young, Col. doliatus Neuw. 1. c. 

 One spec. 

 One spec. Brazil. Garden of Plants. 



115. L. reginae Wagl. 1. c. Coluber regince Linn. Col. graphicus Shaw. 

 Natrix regince, Merr. Coronella regince Schl. Essai, ii. p. 61. Lygophis regi- 

 nce Tschudi, Reise in Peru. 



Two sp. Surinam. Dr. Hering. 



One sp. Para. Col. Abert. 



[June, 



