Nicaragua

17 Av 117.29  70.42  47.18  15.47     3.13 Max 121.00   74.00   50.00   17.00     3.20 Min 111.00  66.00  44.00  14.00     3.00 2xStand. error     1.27     1.51       .75       .35       .03   Baiomys musculus grisescens,   Comayaguela, Honduras 7 Av 103.71  59.00  44.71  14.57     3.31 Max 118.00   68.00   50.00   15.00     3.40 Min  97.00  51.00  42.00  13.00     3.20 2xStand. error     5.50     4.16     2.40       .78       .06   Baiomys musculus nigrescens,   Valley of Comitán 11 Av 115.00  72.09  42.91  15.31     3.15 Max 120.00   77.00   45.00   16.00     3.40 Min 108.00  69.00  89.00  14.50     2.90 2xStand. error     2.12     1.59     1.0       .23       .10

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Geographically, pullus is partly isolated by the Cerros De Villaguaire and the Cerros El Zapotillo to the west and the Cerros De Azaculapa to the north. Certain individuals of a series of specimens, referable to B. m. nigrescens, from 1 mi. NW San Salvador and 1 mi. S Los Planes, El Salvador, are intermediate in coloration between that subspecies and pullus. Three of 28 specimens from El Salvador possess the mid-ventral white stripe.

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Table 2.—Cranial Measurements (in millimeters) of