24 ON THE ZOOLOGICAL POSITION OF TEXAS. 



Boll states that he saw a specimen nearly twelve feet long from near 

 Fort Belknap. 



Bascanium fiagelliforme testaceum Say. I obtained specimens from 

 near Dallas, Houston, Brenham, Helotes, and the upper waters of the 

 Guadalupe and the Llano Elvers. Those from Dallas, Brenham, and 

 Houston, whicb are in the rainy region of Texas, have the greater part 

 of the length a blackish brown. Those from Helotes, the Guadalupe, and 

 the Llano are entirely pale claj^-color. This relation of color to moisture 

 is similar to that observed by Dr. J. A. Allen to prevail among the 

 liodent Mammalia. It is not, however, without exceptions, for I saw a 

 specimen taken near Helotes which resembles the dark -colored sub- 

 species of B. tccniatum ornatmn B. & G. ; and the subspecies of the B. 

 t(vniatum, which I have called B. inceum, is found in the dry region of 

 Arizona, near Camp Grant. The form of B. constrictor^ which is found 

 on the dry plains (Cor2(^/i06Zo?^^al7^^;e?^<m Hallow.), is, on the other hand, 

 of much lighter colors than the variety from the more humid east. I 

 did not meet with this species in Texas. 



Blajps fulvlus Linn. Abundant near Helotes. 



Ancistrodon pisclvorus Latr. Abundant at Dallas and Helotes. 



Ancistrodon contortrix Linn. Common from Dallas to San Antonio. 

 I caught a specimen on the head waters of the Medina. 



Caudisona miliaria Linn. From Dallas, but not obtained in Western 

 Texas. An eastern species. 



Crotalus adamanteus atrox B. & G. I observed this species of rattle- 

 snake to be more abundant in the mesquite prairie, near San Antonio, 

 than elsewhere. I obtained it from Helotes and the plateau country in 

 Bandera County. Mr. Boll has not i)rocured it near Dallas, but sends 

 it from Brown County, in the plateau country north of the Colorado. 



Crotalus confluentus Say. I have only seen this species from Texas 

 from Haskell County, which is between the head forks of the Brazos. 

 Baird and Girard record it from Bexar CountyJn the south, showing 

 that it has an extensive range in the western part of the State. 



BATRACHIA. 



Eana lialecina herlandieri Bd. Common at Dallas and on the first 

 plateau; also in the low country near Washington on the Brazos. It 

 is the only species of the genus I saAv in Texas, but Professor Baird 

 reports E. cateshyana from San Antonio. 



Ewjystoma caroUnense Fitz. Abundant at Dallas, Houston, San An- 



