

%aV.''J PROCEKUINGS OF THE NATIONAL MUSEUM. 053 



Of these subspecies the E. e. plutonia has been found rarely ami at 

 remote loeabties, and the E. e. brnnnea is only known tVoin two spciM- 

 mens, so that these can not be yet regarded asycoffrapliical forms. The 

 E. e. elegan.s has been found so far, in northern and central California 

 only. Tha E. €. I ineolata is from the same re^^ion, and from ()rej;()n 

 and Washington as well. The E. c. vagrans is characteristic of the en- 

 tire region between the Sierra Nevada on the west ami the eastern 

 [ border of the Great Plains on the east, and belongs to higher parts of 

 " the Rocky Mountain ranges as well as to the valleys between them. 

 j The E. e. couchii is characteristic of southern California and southern 

 ' Arizona and New Mexico. Tiie E. e. marcunia belongs to the valley of 

 the Rio Grande, and adjacent regions in Texas and Mexico. It is seen 

 from the above that the EuUcnia elegans inhabits all of the nearctic 

 realm excepting the eastern and austroriparian regions. 



As regards transitions between the subspecies, I refer to the num- 

 ber of spots, which have been shown by Baird and Girard to be 

 characteristic of the E. e. vagrans und E. e. marciana. In six speci- 

 mens of the former, however, I tind the variation to be from eighty- 

 four to one hundred and three. In E. c. marcinna they number 

 from fifty-two to tifty-eight in four specimens, but in an otherwise typ- 

 ical one I tind seventy-three. There is, however, still an interval be- 

 tween the ranges of variation. This is filled by the E. c. couchii where 

 the number of spots runs from seventy-four to ninety-cue in live indi- 

 viduals. The number of spots is thus characteristic in a general way, 

 but not sufficiently exact to define the forms as species. 



I have endeavored to ascertain whether there is any constancy in 

 the number of temporal scales. Thus in the typical form, E. e. clcgaufi^ 

 there are three rows of scales bordering the posterior superior labials 

 above, while in the E. e. lineolata there are as often four as three. In 

 the E. e. vagrans five specimens have four rows and five have three rows. 

 In the E. e. hnmmondii three have three rows, ;md one (No. 8(JC) has 

 four. Often specimens of E. e. marciana, seven have three, and three 

 have four. The rows always have the formula l-'J-.!-4. 



Eutaeiiia elegaiis plutonia Yarrow. 



EnUrn'm vngrann auguKlrostrix Yarrow in Wlnclcr's I'. S. C. d. Siirv. W. lOOtli Mt-r. \'. 



p. fw-l, PI. XX, f. 2, 20. 

 EuUriiia hoishaui Y'arrow, Proo. U. S. Nat. Miis. 1>H:<. \k 1:V2. 



Two specimens known : onr from wtslci n Arizona, and the other from 

 Fort Walla W^alla, Wash. 



Eutaenia elegaus elegans Hil. and Gird. 



Eut(v.n\a elegans Hd. and (Jird., Cat. 18ri3, p. :?.'.; Cope. Check List Batr. Kept. N. 

 Amer., 1875, p. 41, Tropidonolux trivittatux Hallowell, Proc. Phila. Acad., l-'53, 2:J7. 



Four specimens only known ; all from California. 



