CROCODILIANS, LIZARDS, AND SNAKES. 



1045 



The markings about the head are generally very constant and dis- 

 tin('t. Viewed laterally, we see first the largo dark-brown patch at the 

 back i)art of the head, extending as far back as the posterior extremity 

 of the jawbones. In the anterior part of this patch is seen the cres- 

 centic patch (coucave before) of yellowish white, with a more or less 

 narrow dark-brown margin anteriorly. The next black band starts 

 iVom the posterior edge of the superciliaries. and passes obli(inely down- 

 ward and backward along the posterior edge of the sixth upper labial. 

 Siniihir black margins are seen on the posterior edges of the fifth and 

 fourth labials, tlie intervening spaces being yellowish white, particu- 

 larly on the fifth upper labial. Occasionally the posterior margins of 

 the seventh and third labials have the black line as well as those men- 

 tioned, which freijuently 

 extend across to the poste- 

 rior margins of the cor- 

 responding lower labials. 

 The white spot on the ante- 

 rior portion of the occipital 

 suture is always margined 

 with black. 



Tlie six series of black 

 spots are arranged so as to 

 alternate with each other. 

 The lower or third series 

 on each side is below the 

 indistinct lateral stripe. 



The posterior edges of each abdominal scutella shows a black margined 

 spot on each side. The dorsal line is generally a single scale in width, 

 occasionally including portions of the lateral, and itself sometimes 

 encroached upon by the black spots. Each spot is about a scale or 

 a scale and a half long and about three scales broad. The number 

 in the dorsal series from the head to the anus varies from fifty-six 

 to sixty, but in Cat. 'No. 8(»0 they number seventy-three. Posterior 

 edges of scales very slightly emarginate, if at all. All are decidedly 

 keeled. 



Baird and Girard give the following as the numlxMs of abdominal 

 scuta and scutellte and the dimensions in inches: 



I'"i,U-. 28'.). 



EUT^ENIA ELEGANS MARCIANA BaIRI) AM) ('ilKARD. 



= 1. 



Sonora, Mexico. 



Cat. N... 72:!5. U.S.N.M. 



Red River, Arkansas .. 

 New IJraunfels, Texas. 



Do 



Do 



Do 



Neai' Sau Antonio 



Do 



Sau Pedro 



Do 



ludianola 



