W Matat['a]n
(84985-86). The two individuals from the last-mentioned place extend the
known range of the species approximately 275 miles north-northwest from
a locality 7 mi. W, 1/2 mi. S Santiago, Colima (Anderson, 1956:349), and
place the limit of the known distribution of _P. psilotis_ farther to
the north in western M['e]xico than in the eastern part of the country. We
follow Burt and Stirton (1961:24-25) in use of the generic name
_Pteronotus_ for this species.

The two specimens from 1 mi. W Matat['a]n were shot at late dusk as they
foraged with other bats, presumably of the same species, low over water
at the place where the R['i]o San Antonio joins the larger R['i]o Baluarte.
The four individuals from 1/2 mi. S Concepci['o]n were captured in mist
nets stretched across the R['i]o de las Canas at the Sinaloa-Nayarit
border, and were taken shortly after dark at heights of three feet or
less above the water. Our six specimens all are males. Five are in the
reddish color phase and one is in the brownish phase.

Average and extreme measurements of the six males, which average
slightly smaller than specimens examined from Colima and Guerrero,
are as follows: total length, 66.8 (65-69); length of tail, 16.3
(15-18); length of hind foot, 11.8 (11-12); length of ear from
notch, 16.9 (16.5-17.0); length of forearm (dry), 41.5 (40.6-42.4);
weight in grams, 8.3 (6.9-9.8); greatest length of skull, 15.4
(15.2-15.5); zygomatic breadth, 8.3 (8.2-8.4); interorbital
constriction, 3.4 (3.3-3.6); mastoid breadth, 8.7 (8.6-8.8); length
of maxillary tooth-row, 5.8 (5.8-5.9); breadth across M3, 5.4
(5.3-5.6).

_=Sturnira lilium parvidens=_ Goldman.--The first specimens to be
reported from Sinaloa are as follows: 32 mi. SSE Culiac['a]n (61087); 1 mi.
S El Dorado (75207); P['a]nuco, 22 km. NE Concordia (85648-50). The three
bats from the last-mentioned locality were caught after midnight in a
mist net stretched across a road adjacent to a nearly dry stream bed.
The vegetation in the vicinity of the net consisted mostly of dry weeds
and grass along with some low shrubs, but a tree-filled canyon was about
one-fourth mile above the net. We lack details about the capture of the
other two bats.

_S. l. parvidens_ has been reported only once from farther north in
western M['e]xico than Sinaloa. Anderson (1960:7) recorded five specimens
from along the R['i]o Septentri['o]n, 1-1/2 mi. SW To