m "Rio Coco," probably from the headwaters of
that stream in the vicinity of San Juan de Rio Coco and thus near the
divide between Caribbean and Pacific drainages, is intermediate in size
between the two subspecies and suggests intergradation between them. As
noted also by Gardner _et al._ (1970:715), we find no differences in
length of ear between _microtis_ and _mexicana_ (contrary to Miller's
claim, in the original description, that _microtis_ had noticeably
smaller ears), nor do we note any consistent differences in color
between the two races on the basis of the specimens at hand.

Our specimens from Isla del Maiz Grande inexplicably agree rather
closely in size (average but slightly smaller) with specimens of _M. m.
mexicana_ from western Nicaragua and elsewhere within the range of the
subspecies, and are tentatively, therefore, referred to _mexicana_.
Four specimens earlier reported (G. M. Allen, 1929:130) from the same
island also are relatively large (forearm 35 mm). Further commentary on
this insular population must await a time when additional material is
available from Central America.

Tonatia nicaraguae Goodwin, 1942

_Specimens._--_Boaco_: Santa Rosa, 17 km N, 15 km E Boaco, 300 m,
1. _Chontales_: Hato Grande, 13 km S, 8 km W Juigalpa, 60 m, 1.

Only four specimens of this seemingly rare species have been recorded
previously from Nicaragua--one (the holotype) from Kanawa Creek, near
Cukra, north of Bluefields, 100 ft, Zelaya (Goodwin, 1942b:205),
another from 12.5 mi. S and 13 mi. E Rivas, 125 ft, Rivas (Davis and
Carter, 1962:67-68), and two from 6 km N Tuma, 500 m, Matagalpa (Valdez
and LaVal, 1971:248). Our specimens were caught in mist nets placed
over small, quiet streams that were fringed with tall, gallery forest.
The surrounding areas were savanna-like with small stands of secondary
forest. An adult male taken on 21 April had testes that measured 5 mm
in length, whereas those of another (9 August) were 3 mm.

Handley (1966b:761) synonymized _T. nicaraguae_ with _Tonatia minuta_
Goodwin, 1942, a conclusion with which we agree. However, the name
_nicaraguae_ (Goodwin, 1942b:205) has page priority over _minuta_
Goodwin (op. cit.:206) and is the valid name for the species rather
than _minuta_ as used by Handley (see also LaVal, 1969:820; Gardner
_et al._, 1970:716; Valdez and LaVal, 1971:248).

Measurements of the two males (that from Hato Grande listed first) are
as follows: total len