vol 

 18'J1 



8,/i;' ] PliOCEEDINGS OF THE NATIOxNAL MUSEUM. (io? 



Euteeiiia cyrtopsis collaris .l.in. 

 Tropidoitoltts colhnia .Jaii, Icoiio^^riiiiliia ilf;^li Ofnl. ii, 2i>, I'l. v, Eij;. ",'. 



Mexico fjeuorally; Lower Culifoniia; Arizona f(\iMii>s Wliippk' and 

 Verde); ^ew Mexico (Lake \'alley.) 



Eutaenia cyrtopsis ocellata Cope 

 Bull. V. S. Nat. Mn.s., No. 17, i>. 22, 1680. 



llelotes, West Texas; several specimens. 



Eut^iiia infernalis Blainville. 



Cohibir iii/eriHiUs Hlv,, Nonv. Ann. Mus. His. Nat. Paris, in, 1831, p. .V.>, PI. xxxiv 

 A, l-'ig. :5.!a; IU\. aud Gird., Cat. IS.")!?, p.^O. 



Tills species occupies a position intermediate between the E. ele(/ans 

 and the JB. sirtalis, havings the labial plates of the former and the scale 

 foriiinla of the latter. In color pattern it differs from all the subspecies 

 of either, and as its tail is generally lonj^er tiian either, it is necessary 

 to admit it as a separate species. It is more than usually (;ompri'ssed 

 at the anal region, where the scales are wide and more irregular than 

 is observed in other si)ecies. In the form ridua thiscomi)ression extends 

 to the entire body. There are two well-marked subspecies as follows: 



Color hlackinh, with tiaiis of an inlV'nor row of spots, and a distinct lateral stripe; 



belly yellowish olive with black center ; throat and lips yellow .. K. i. infertinlin. 



l^niforni black, with yellow d.irsal stripe only I'J. i. vithia. 



(I. Eutaenia infernalis infernalis Mlv. 



£m<(( Hi'a «H/V;»irt/i« Bd. iV Gird., Cat. 18.');{, p. 26, Blainvilh', 1. c. ; Cnhiher infcnialit 

 Blainville, Nouv. Ann. Mus. d'Hist. Nat., iii, ls:?4, j). .V.» ; IM. wiv. IHa. 



Head moderately distinct, muzzle medium. Parietal plates not short- 

 ened, narrowed (wsteriorly. Scales not narrow, /graduating in width 

 iVom the first row, which is smooth. Gastrosteges 158, anal 1, urosteges 

 70. 



Color a blackish brown, with a median yellow stripe, wliich covers 

 the middle and parts of adjacent rows to the base of the tail, where it 

 contracts to one row and continues to the end. lielly from yellow to 

 olivaceous, extending to the third r()W of scales inclusive, with or with- 

 out a shade on the first row <listingtiishing a lateral stripe, immaculate. 

 Scales from fourth to eighth rows inclusive, with the ke«'ls olivaceous or 

 yellowish forming delicate hmgitmlinal lines. Shades of the sami' color 

 are so distributed on the scales as to give llir appearanc*' of indistinct 

 spots in two rows, an appearance which is increased by a few scattered 

 yellowish dots on the margin of some of tlif scales. This app«'arance 

 represents actual spots in some specimens. In some of the larger sp«'ci- 

 mens the appearance is lost, nothing but the few yellow specs remain- 

 ing. Labial i)lates yellow or olive, with or without very narrow post- 

 erior black borders. Throat aud chin always yellow. 

 Proc. K M. 91 i'2 



