ed Vireo within the last generation. The size of the
testes (5x3 mm.) of No. 32103 and the date (June 20) on which it was
obtained suggest breeding by _Vireo flavifrons_ in Coahuila.

_Vireo solitarius solitarius_ (Wilson).--_Specimen examined:_ one,
[Female] 31640, from 9 mi. E Hermanas (=Canyon de Parajos in the Sierra
de Parajos Azule), 2100 ft., December 7, 1953.

This subspecies of the Solitary Vireo is an uncommon migrant or winter
visitant to Coahuila. Dickerman obtained No. 31540, whose skull was
unossified and whose ovary was small, in an oak and palm habitat. The
bright yellow flanks, large and yellow wing bars, and the uniform olive
green back indicate that this specimen is a typical representative of
_V. s. solitarius_. This subspecies was previously unrecorded in
Coahuila.

_Vireo solitarius cassinii_ Xantus.--_Specimens examined:_ total 2:
[Female] 35408 (skeleton only) from 5 mi. W, 3 mi. S Acebuches, 6200
ft., May 12, 1954; and [Male] 31589 from 20 mi. S Ocampo, 6200 ft.,
April 4, 1954, measurements: wing, 75 mm.; tail, 57 mm.; culmen, 10.5
mm.; weight, 14 gms.

This subspecies of the Solitary Vireo seems to be uncommon in Coahuila.
No. 31589 provides the first record of _V. s. cassinii_ in Coahuila.
Van Hoose has (1955:303) erroneously reported that Dickerman obtained
No. 31589 on July 4, 1954; the correct date is April 4, 1954.

Although the size of No. 31589 is large for _V. s. cassinii_, the color
(sides and flanks with less yellow, more olive; narrow white wing bars)
resembles that of typical representatives of _cassinii_. The testes of
No. 31589 were not enlarged. Dickerman suggested that the female from 5
mi. W and 3 mi. S Acebuches showed some resemblance to _V. s.
plumbeus_. This is not to be unexpected since the subspecies _plumbeus_
has been reported from the Chisos Mountains of Texas (Van Tyne and
Sutton, 1937:82) and from northern Chihuahua (Miller, Friedmann,
Griscom, and Moore, 1957:227).

*_Vireo olivaceus_ (Linnaeus).--_Specimen examined:_ one, [Male] 32104,
from 12 mi. N, 12 mi. W Jimenez, 850 ft., June 19, 1952.

The Red-eyed Vireo has been uncommonly reported from eastern Coahuila.
Miller, Friedmann, Griscom, and Moore (1957:229) recorded _V.
olivaceus_ from Sabinas on May 22 and from Las Vacas Creek on June 7 as
late spring migrants. Hellmayr (1935:131) listed the Red-eyed Vireo
from northern Coahuila. Findley saw a Red-eyed Vireo 2 mi. W Jimenez on
June 19, 1952. The size of