504 NOTES ON NORTH AMERICAN SNAKES — STEJNEGER. 



trict of Columbia (No. 1G392), by Mr. Holtou, aud No. 16380 by Prof. W. 

 B. Barrows. During tbe present year Mr. Audubon Eidgway secured 

 a third specimen in the same suburb of Washington within a few hun- 

 dred feet of where the others were taken. 



Drymobius niargaritiferus (SCHL.). 



Schlegel described his Rerpetodryas niargaritiferus from a specimen in 

 the Paris Museum, "decouvert a la Nouvelle Orleans par M. Barabino." 

 Duraeril, however, in the Erpetologie generale, vii, p. 540, says that 

 "L' individu type de V Rerpetodryas perle^ de M. Schlegel, a ete adresse 

 de New York i^ar M. Barabino," but adds that since then several other 

 specimens had been received, among them "quatre autres origiuaires, 

 les uns du Mexique, les autres de la Nouvelle-Orleans." The latest 

 author to report upon the snakes in the Paris Museum, Mr. Bocourt 

 (Miss. Sc. Mex., Zool., Eept., p. 718, 1890) only remarks, " La collection 

 erpetologique du Museum renferme de nombreux individus de cette 

 espece : les uns out et6 receuillis par M. Barabino dans le sud des 

 Etats-Unis." 



As will be seen, the authenticity of the early records of this species 

 having been found within the United States are somewhat defective, 

 and the definitive location of it within our boundaries is therefore very 

 interesting. The proof is furnished by four specimens (U. S. Nat. Mus. 

 Nos. 17069-17072), which were collected in Cameron County, the south- 

 westernmost county of Texas. 



Tropidoclonion lineatum (Hallow. )• 



Mr. Julius Hurter has recently discovered this species in St. Louis, 

 Missouri, and presented the Museum with several specimens (16485- 

 16487). 1 found the ground color (which was drab in the living speci- 

 mens) to vary a great deal in shade, some being lighter, with the dark 

 dots very distinct, others being darker and consequently more uniform. 



With regard to the subspecies recently described by Mr. R. Ells- 

 worth Call ( Amer. Journ. Sc. (3), xli, April, 1801, p, 298), as T. I. ioww, 

 I can only say that I fail to discover, from his description, any differ- 

 ence which would separate the Iowa specimens from Hallo well's type 

 which came from Kansas, or from those before me from Missouri. In 

 the latter I count nineteen scale rows, the same number as given by 

 Hallowell in the original description, as well as by Mr. Call for his sub- 

 species, although he states that it " differs in the number of rows of 

 dorsal scales." 



1 St. Louis is, with the exception of Urbana, 111., the most eastern reli- 

 able record of this species, for the specimen No. 10089, in Yarrow's cat- 

 alogue of specimens in the U. S. National Museum (Bull. 24, TJ. S. Nat. 

 Mus., p. 131), given as T. lineatum is really a Storeria occipitomacnlata, 

 and the locality " Hughes, Ohio," for the present species should there- 

 fore be eliminated. 



