May, 1803.] REPTILES OF THE DEATH VALLEY EXPEDITION. 1G3 



relative size of the claw sheaths is hardly of such importance as to 

 justify a generic arrangement which would place the American forms in 

 two genera, one of which would include the species found only in the 

 East Indies. The presence or absence of enlarged chin shields seems 

 to me a much more important character, and is far more satisfactory, 

 since it effectually separates the American from the Indian species. 



The three genera, by Boulenger referred to the family Eublejtliari- 

 dce, would then stand thus : 



Digits granular inferiorly \ ^?S\* 1 



tKffi )- > Enlarged chin shields. 



Digits lamellar inferiorly J ^ern Asia). 



l(2£&). | No chin shields. 



The genus Goleonyx would then contaiii four species, as follows : 



a 1 Claw sheaths very large Coleonyx elegans 



a 2 Claw sheaths small 



I 1 Back with enlarged tuhercles Coleonyx dovii 



& 2 Back uniformly granular 



c 1 Snout elongate Coleonyx variegatus 



c 2 Snout short Coleonyx brevis 



Boulenger (I. c.) recognizes two species of the G. variegatus type, one 

 with the snout elongate, while in the other it is shortened. The former 

 he gives a new name, E. fasciatus, and retains the name given by 

 Baird for a specimen from Texas. It should be remarked that all his 

 material consisted of two specimens, one from Texas, the other from 

 Yentanas, Mexico. 



I have examined twelve specimens with the result that there is an 

 appreciable difference, as indicated by Boulenger, between five Texan 

 specimens, on the one hand, and seven specimens from Arizona and 

 California, on the other, and the latter agree so well with Boulenger's 

 description of his Eublepharis fasciatus that I have no doubt about the 

 identity of the Mexican specimen and those from Arizona and Cali- 

 fornia. But it will be observed that Prof. Baird's type of G. variegatus 

 came from the Colorado Desert, in southern California, and that con- 

 sequently Boulenger's E. fasciatus is a synonym only, while it is the 

 Texan form, with its short snout, less developed anterior nasals, and 

 more numerous labials, which will have to be named. This form I 

 would propose to call Goleonyx brevis.] 



The synonymy of the two forms would then stand as follows : 

 Coleonyx variegatus. 



1859. Stenodactylus variegatus Baird, Proc. Phila. Acad., 1858, p. 254 (type No. 3217, 

 Colorado Desert). Id., Mex. Bound. Surv. Rept., n, pp. 12, 34 (part), pi. 

 xxiii, figs. 9-18 (type from Colorado Desert) and figs. 19-27 (male from Ft. 

 Yuma, 1859). 



* Hemitheconyx, nom. nov., for Psilodactylus Gray, 1864, nee Psilodactylus Oken, 

 1816. Type Hemitlieconyx caudicinctus (Dum.). 



tType, U. S. Nat. Mus., No. 13627; Helotes, Bexar Co., Texas; Marnock coll, 



