---------------+--------+--------+---------+--------+---------- | _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 | 39.00 | 14.50 | 2.90 2xStand. error | 2.12 | 1.59 | 1.0 | .23 | .10 ---------------+--------+--------+---------+--------+---------- 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. TABLE 2.--CRANIAL MEASUREMENTS (in millimeters) OF ADULTS OF FOUR SUBSPECIES OF BAIOMYS MUSCULUS Table headings: Col A: Occipitonasal length Col B: Zygomatic breadth Col C: Postpalatal length Col D: Least interorbital breadth Col E: Length of incisive foramena Col F: Length of rostrum Col G: Breadth of braincase Col H: Depth of cranium ================+======+======+======+======+======+=====+=====+===== | A | B | C | D | E | F | G | H ----------------+------+------+------+------+------+-----+-----+----- | _Baiomys musculus handleyi_, | Sacapulas, El Quiché, Guatemala Number | of specimens | 8 | 8 | 8 | 9 | 9 | 9 | 8 | 8 Type 275604 ♀ | | | | | | | | USNM | 20.0 | 10.4 | 7.3 | 4.0 | 4.5 | 7.3 | 9.7| 7.1 Average | 19.6 | 10.5 | 6.9 | 4.0 | 4.2 | 7.2 | 9.8| 7.1 Maximum | 20.7 | 11.0 | 7.4 | 4.0 | 4.5 | 7.7 | 10.2| 7.2 Minimum | 18.8 | 10.2 | 6.4 | 3.9 | 4.0 | 7.0 | 9.7| 6.8 | | | | | | | | ----------------+------+------+------+------+------+-----+-----+----- | _Baiomys musculus pullus_, | 8 mi. S Condega, Esteli, Nicaragua | Number | | | | | | | | of specimens | 17 | 17 | 15 | 17 | 17 | 17 | 17 | 17 Type 71605 ♀ KU | 19.2 | 10.2 | 6.8 | 3.8 | 4.3 | 6.8 | 9.5| 7.0 Average | 19.3 | 10.2 | 7.0 | 3.9 | 4.3 | 7.0 | 9.6| 7.0 Maximum | 19.8 | 10.6 | 7.3 | 4.1 | 4.6 | 7.4 | 10.0| 7.3 Minimum | 18.9 | 9.7 | 6.8 | 3.8 | 4.0 | 6.5 | 9.3| 6.8 ----------------+------+------+------+------+------+-----+-----+----- | _Baiomys musculus grisescens_, | Comayaguela, Guatemala | Number | of specimens | 6 | 7 | 7 | 7 | 7 | 6 | 7 | 7 Average | 19.7 | 10.5 | 6.9 | 3.9 | 4.1 | 7.1 | 9.6 | 6.9