454 PROCEEDINGS OF THE NATIONAL MUSEl'M vou »s 



•MICRURUS LATICOLLARIS (Peters) 



A single specimen in the Museum is from a barranca near Cuerna- 

 vaca, Morelos (No. 20167). 



MICRURUS LATIFASCIATUS Schmidt 



One specimen (No. 111323) was taken near La Esperanza, near 

 Escuintla, Chiapas. 

 The Museum has no others from Mexico. 



MICRURUS NIGROCINCTUS ZUNILENSIS Schmidt 



Two specimens, one from La Esperanza (No. 111332), the other 

 from Salto de Agua, Mount Ovando (No. 111331) , both near Escuintla, 

 Chiapas, are tentatively referred to this subspecies. They differ from 

 described specimens in having the yellow bands distinct, complete 

 about bod} 7 , one and one-half scales wide; black bands on body and 

 tail fewer, 12 + 3 or 4; and the prefrontals in contact with the labials 

 (narrowly separated on one side in one). 



The Museum has no others from Mexico. 



♦MICRURUS NUCHALIS Schmidt 



Four specimens in the Museum are from "Tehuantepec," Oaxaca 

 (Nos. 302G1-3, 32348). 



♦NATRIX ERYTHROGASTER TRANSVERSA (Hallowell) 



Three specimens in the Museum are from Santa Catarina, Nuevo 

 Leon (No. 1314) ; San Diego, Nuevo Leon (No. 1319) ; and Mier, 

 Tamaulipas (No. 46582). 



NATRIX RHOMBIFERA RHOMBIFERA (Hallowell) 



One specimen (No. 110511) was found in the Usumacinta River near 

 the village pier at Emiliano Zapata (Montecristo), Tabasco. It rep- 

 resents the southernmost record of the genus in this continent and 

 also presents an interesting problem with regard to its identity. 



The specimen is rather typical, with the belly spotted distinctly; 

 scale rows 27-25-20; ventrals 138; caudals 82; supralabials 8-8; in- 

 fralabials 11-11; preoculars 2-2; postoculars 3-3; temporals 1-2-3. 

 The presence of this form south as well as north of the range of r. 

 blanchardi explains the specimen mentioned by Clay from La Antigua, 

 Veracruz, which he referred with question to r. rhonibifera, in spite 

 of the fact that it was separated by several hundred miles from other 

 records of the race, skipping over the entire range of r. blanchardi. 

 While this distribution is not exactly orthodox, I can find no char- 



