VOL. XIV, 1 

 1891. J 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



663 



form consists in the fact tliat on the anterior fifth or sixth of the length 

 of the body the spots ofthe inferior ^o^v extend across the lateral stripe, 

 breaking- it np into sections. In many of the specimens the spots of 

 the superior row become opposite to those of the inferior row, and join 

 them, and the latter again join a row which is below the lateral 8trii)e. 

 The three rows of spots thus become continent, form cross bars inter- 

 rupted only by the median dorsal stripe, as in the Euimiia scalaris. 

 The bars are much less regular than in that species, the part that crosses 

 the lateral stripe being distinctly contracted, and the superior part being 

 much widened. 



In four specimens (8070) of this form the tail measures, resi)ectively, 

 4j^, 4f, 4f, ^ of the total length. Gastrosteges in one of the same, 

 153; anal 1; urosteges 01. Length of same specimen, 520 millimeters; 

 length of tail, 104 millimeters. Length of a larger specimen, 914 mil- 

 limeters ; of tail, 190 millimeters. In several of the specimens a deli- 

 cate black line borders the median stripe on each side. 



Cata- 

 logue 

 No. 



8070 

 1018 

 1051 



No. of 



spt'ci- 



24 

 2 



1 



Lccalii.^ 



Aux Plaiues, ni. 



do 



Wiscousiu 



From whom re- 

 ceived. 



R. Kcunicott. 



do 



« 



Nature of 

 ."ipecimen. 



Alcoholic. 

 Do. 

 Do. 



In the lot 8070 are included three specimens of the E, sirtalis sirtalis. 



Biiteenia sirtalis dorsalis Bd. and Gird. 



Eulcmia dorsalis Bd. and Gird., Cat. Serpt. N. Amer., 1853, p. 31, Cope Check List 

 N. Amer. Bati. Kept., 1875, p. 41. Etiicenia ornata Bd. and Gird., Yarrow 

 Rcptilia U. S. G. G. Ex. W. lOOtli nier. v, p. 550-553; Check LLst N. Kmn. 

 Batr. Kept. Bull. U. S. Nar. Mus., No. 24, 1883, p. 122; not of Bd. and Gird. 

 TropidonoUis sirtalis var. dorsalis. Jau, Icon. Gen. Ofid. ii 25, iv, fig. i. 



This form, which is easily distinguished in life by its red dorsal stripe, 

 inhabits principally the Kio Grande Valley, being associated with the 

 E. elegans marciana. It is nearest to the E. s. parietalis, but it lacks the 

 wide black band on each side of the dorsal stripe which is in contact 

 with the lower series of lateral spots in that form. It lias instead, a 

 narrow black border of the dorsal stripe, which does not touch the small 

 distinct lateral spots. Intermediate forms, however, occur, in which 

 the black borders are wider and the lateral spots larger. Such is No. 

 954, from Salt Lake, Utah, and another specimen from California. 



Eutaenia sirtalis bbscura Cope. 



Check List N. Am, Batr, Rept,., 1875, p. 41, in Yarrow's Report Reptiles U. S. G. G. 

 Survey W. of 100th mer., 187.5, v, p. .546. 

 This form is a derivation from both E. .s. sirtalis and E. s. imrictaUs by 

 a fusion of the spots into black bands. The specimens in the National 

 Museum are from remote localities, viz.: Westi)ort, Nova Scotia; Lac 

 que Parle Minn.: Fort Benfon, Mont. • and California. 



