M, topotype.]

_Remarks._--The subspecific name _dalquesti_ is given in recognition of
Prof. Walter W. Dalquest who gathered the largest and most varied
collection of mammals ever taken in the state of Veracruz.

Inspection of the measurements given above will reveal that there is no
overlap between _extremus_ and _dalquesti_ in the interorbital
constriction or occipital depth and only slight overlap in the length of
the maxillary tooth-row and maxillary breadth.

In 10 adult females from Ocosingo, Chiapas, there is suggestion of
intergradation between _dalquesti_ and _extremus_ in that one specimen
(66515 KU) has the cranial characters of _extremus_ except that it is
large like _dalquesti_; in two other skulls P3 is slightly displaced
lingually and two other skulls bear a slight sagittal crest. These are
features characterizing _extremus_. Otherwise the specimens resemble
_dalquesti_, to which subspecies they are here referred.

Three males from a place 8 km. W and 10 km. N El Encino, 400 ft.,
Tamaulipas, are the northernmost representatives of the species and
differ from the other specimens of _dalquesti_ in shorter forearm,
shorter maxillary tooth-row and lesser maxillary breadth.

Study in the laboratory was supported by Grant No. 56 G 103 from the
National Science Foundation. Field work was supported by a grant
from the Kansas University Endowment Association. We thank Dr. David
H. Johnson for lending eight topotypes of _M. n. extremus_. Other
specimens of _extremus_ available to us are as follows: 1 mi. E
Teapa, Tabasco, 1 (7535 LSU--courtesy of Dr. George H. Lowery, Jr.);
Cayo Dist. Augustine, British Honduras, 1 (9670 KU, in red phase);
12 km. NNW Chinaja, Guatemala, 4.

_Specimens examined._--Total, 142, as follows: Tamaulipas: 8 km. W,
10 km. N El Encino, 400 ft., 5. Veracruz: 4 km. WNW Fortin, 3200
ft., 1; 2 km. N Motzorongo, 1500 ft., 1; 3 km. E San Andres Tuxtla,
1000 ft., 7; 38 km. SE Jesus Carranza, 500 ft., 118. Chiapas:
Ocosingo, 10.

_Transmitted June 30, 1961._

28-8477

End of the Project Gutenberg EBook of A New Subspecies of the Black Myotis
(Bat) from Eastern Mexico, by E. Raymond Hall and Ticul Alvarez

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