_Notiosorex crawfordi_ (Coues).--A non-pregnant female (75184) was obtained on November 29, 1957, at El Fuerte by W. L. Cutter. Comparison of this specimen with topotypes of _N. evotis_ (see below) and with undoubted examples of _N. crawfordi_ proves our specimen to be referable to the latter. We presume that the shrew reported as _evotis_ on geographic grounds from El Carrizo by Hooper (1961:120) also is referable to _crawfordi_. External measurements of our female are: total length, 77; length of tail, 20 (tip missing); length of hind foot, 11; length of ear from notch, 8; weight in grams, 4. Cranial measurements of this individual are given in Table 1. [Illustration: FIG. 1. Map of Sinaloa on which are plotted symbols representing placenames mentioned in text. From north to south, these are: El Fuerte; San Miguel; Los Mochis; Guamúchil; Terrero; Pericos; Culiacán; El Dorado; Piaxtla and Camino Reál (one symbol); Pánuco; Mazatlán; Matatán; Rosario; Escuinapa; Concepción.] _Notiosorex evotis_ (Coues).--Four topotypes (85533-36), all males, were collected by Lee at Mazatlán. One was caught on December 17, 1960, in a museum special trap set "in low weeds near thorn bush" in a sandy field at the north edge of Mazatlán, less than a mile from the ocean. A few trees and some grasses grew in this area; _Mus musculus_ and _Perognathus pernix_ were taken in the same line of traps. Additional trapping at this locality failed to produce more shrews. The other three specimens were captured alive on February 1 (one) and February 2 (two), 1961, in the wake of a bulldozer that was clearing land adjacent to the place where the first specimen was trapped. The ground cover being cleared away consisted mostly of dry, dense weeds and short, thorny scrub; the latter was sparse in some places and formed dense thickets in others. One individual that was kept alive for a short time in a can ate crickets and roaches readily and ate one spider, but refused isopods. On one occasion it ate six crickets in about three hours. Wet oatmeal and oatmeal mixed with peanut butter both were refused. TABLE 1. CRANIAL MEASUREMENTS OF TWO SPECIES OF NOTIOSOREX. Table Legend for the table headers: Column CA: Catalogue number, or number of specimens averaged, and sex Column CO: Condylobasal length Column IN: Interorbital constriction Column MA: Maxillary breadth Column CR: Cranial breadth Column PA: Palatal length Column LE: Length of maxillary tooth-row ==================================================================== CA | CO | IN | MA | CR | PA | LE --------------------+-------+-------+-------+-------+-------+------- _Notiosorex crawfordi_, Huachuca Mts., Arizona[A] | | | | | | Average 6 (2♂, 4♀) | 16.01 | 3.72 | 5.08 | 8.32 | 6.59 | 5.93 Minimum | 15.7 | 3.6 | 4.9 | 7.8 | 6.3 | 5.8 Maximum | 16.5 | 3.85 | 5.2 | 8.8 | 7.15 | 6.2