570 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 89. 



left side, 13 on right; 13 lower labials on left side, 15 on right; 

 25 rows of scales, all keeled except first two, which are smooth; 153 

 ventrals; anal single; subcaudals 28, first one and last three divided. 

 General color chocolate (the specimen was changed from alcohol to 

 formalin which caused the epidermis to peel off, leaving the snake 

 of a grayish cast), dorsally marked with short crossbars of dark 

 shading into a black line posteriorly or anteriorly, these bars some- 

 times occurring in pairs and then separated by one or two scales 

 width of ground color; tail with three distinct brown half rings 

 on anterior part, remainder uniform brown dorsally; brown spots 

 covering parts or all of from one to four scales laterally; whole body 

 more or less speckled with black or brown; lateral scales covered 

 with fine specks; ventrals of anterior portion almost white, poste- 

 riorly becoming slightly speckled with dark, the specks farther back 

 becoming so numerous as to merge into spots or blotches until the 

 posterior half of the ventral surface is almost entirely dark brown; 

 a white median line on rostral continuing onto lower jaw and expand- 

 ing between two wide dark bars, which extend about halfway back 

 on the jaw; a light line bordering the second, third, fourth, and 

 fifth labials continuing onto the lower jaw; a light band extending 

 obliquely from the nasals, under the eye to the last four labials, 

 covering them almost completely; below this, running across the pit, 

 a dark band spreading out onto five or six lower labials; a prominent 

 dark postocular band, about three scales wide, not bordered by white 



above. 



Dimensions. 



mm. 



Total length 495 



Tail, from vent 51 



Rattle 28 



Remarks. — This specimen shows but few differences from Doctor 

 Meek's brief description of the type. The latter, which has a body 

 length of 380 mm. and a tail of 35 mm., has 160 ventrals and 24 

 subcaudals, and Doctor Meek describes its color as "light olive- 

 brown, more or less irregularly blotched with white." 



Doctor Meek says : "In general, this species bears some resemblance 

 to Crotalus lefidus Kennicott. It differs in being light brown in- 

 stead of greenish gray, and in having shorter transverse dorsal 

 I bars, which are much lighter than the ground color, instead of black 

 crossbars, which are so characteristic of C. lepidus." I have made 

 a careful study of Crotalus wiUardi and can find no resemblance to 

 0. lejndus. The snout is elevated and not depressed, the head is 

 triangular instead of oval; dorsal scale rows 25 instead of 23; the 

 ground color is brown instead of greenish gray; there are no stripes 

 on the side of the head of C. lepidus. In fact, instead of resemblances 

 there seems to be considerable contrast between the two species. 



