228 MR. O. SALVIN ON GUATEMALAN REPTILES. [May 28, 



Coloration. — Ground-colour red, yellow beneath ; upper portion 

 of the head black as far as the anterior portion of the occipital shields. 

 Twenty-seven black bands on the body, occupying a space equal to 

 each red interval. The intervals between each black ring irregularly 

 marked with black markings, which become more defined and stronger 

 on the posterior portion of the body. Tail banded with 16 black 

 rings. The intervals between each black ring have a black mark 

 on the upper surface, so large as nearly to obliterate the red ground- 

 colour. Maxillary teeth gradually increasing in length ; last pair 

 larger than the rest, and separated by an interspace. 



The type of the genus Pleiocercus is P. elapo'ides of Cope, Pr. 

 Ac. Nat. Sc. Philad. 1860, p. 2.53. The description is taken from 

 Mexican specimens collected by Serior R. M. de Oca near Jalapa. 

 Elapochrus deppei, Peters, appears to be quite identical with Pleio- 

 cercus elapdides ; but as the latter name has the priority of two days 

 over Dr. Peters' description, Mr. Cope's genus and species must 

 stand. The present species is closely allied to P. elapdides; the ar- 

 rangement of the coloration in equidistant bands instead of triads 

 with yellow intervals, and the existence of an interspace between the 

 last pair and the rest of the maxillary teeth, however, entitle it to 

 specific separation. 



There was but one specimen in the collection, adult and in very 

 perfect preservation. 



5. Stenorhina ventralis, Dum. & Bibr. 

 One adult specimen. 



6. Trofidonotus ordinatus, Linn. 



Not nearly so numerous at San Ger^nimo as at Dueiias. 



7. Ischnognathus dekayi, Dum. & Bibr. 



8. Spilotes corais, Cuv. 



Two large specimens, measuring nearly 7 feet each. 



9. DiPSADOMORPHUs BiscuTATUS, Dum. & Bibr. 



One specimen in the collection. This has the scales in 27 rows. 

 Of the examples in the British INIuseum one has the scales in 26 

 rows, another in 24, and one in my own collection from Lanquin in 

 Vera Paz in 24 rows. 



10. Boa constrictor, Linn. 



Three specimens, the largest measuring 5 ft. 6 in. 



1 1 . Elaps corallinus. 



There are five specimens of Elaps in the collection, all belonging 

 to the southern form E. corallinus. In all of these the snout is 

 black as far as the anterior portion of the vertical shield, and the 

 first black ring commences across the posterior portion of the occi- 

 pital shields. 



