crescents between rows three to six are present.

These specimens from Colorado also differ from typical _parietalis_ in
having the black spots on the anterolateral edges of the ventrals less
developed. In three of the 45 these spots are lacking entirely and in
four others they are few and small. In the majority of specimens the
spots are from 1/4 to 1/5 the length of the ventrals. In approximately
one-third of the specimens the spots are absent posterior to mid-body.
In five specimens obtained at Sheridan Lake, Pennington County, South
Dakota, in the Black Hills in August, 1960, dorsolateral areas are
dark with red crescents small and inconspicuous, and with black spots
either lacking from the ventrals or only faintly developed. In two
specimens from Sundance, Crook County, northeastern Wyoming, the red
crescents are small and inconspicuous also. In one of these specimens,
KU 28028, small black spots are present in the corners of the
ventrals, but in the other, KU 23654, the spots are absent.

In having the dorsolateral area consistently black, with the three
uppermost series of red crescents reduced or absent, and in having the
ventral black spots reduced or absent, these specimens from Colorado,
Wyoming, and South Dakota differ from more eastern and more typical
_parietalis_, and tend toward _fitchi_, even more strongly than some
Idaho specimens tend toward _parietalis_. Nevertheless, all things
considered, the Continental Divide is the most logical boundary
between the two subspecies, even though occasional individuals and
even local populations deviate from the general trend of characters
from east to west.

ACKNOWLEDGMENTS

Dr. Doris M. Cochran of the United States National Museum
kindly furnished information concerning the type specimen of
_Eutainia dorsalis_ formerly in the National Museum collection
but now lost. Dr. James S. Findley of the University of New
Mexico and Dr. Ralph J. Raitt of New Mexico State University
contributed habitat notes and records of specimens and loaned
us critical specimens of _T. sirtalis_ from New Mexico. Drs.
George F. Baxter of the University of Wyoming, John M. Legler
of the University of Utah, and Wilmer W. Tanner of Brigham
Young University kindly provided us with information
concerning the specimens in the collections of their
respective institutions, and their personal observations
concerning the distribution of garte