n. Sutton and Burleigh
(1939a:37) reported _M. p. leucopterus_ from Diamante Pass. Amadon and
Phillips (1947:578) found a young Mockingbird out of the nest begging
for food from an adult on August 18 at Las Delicias. Burleigh and
Lowery (1942:199) found the Mockingbird on the arid plateau "about
Saltillo." Hellmayr (1934:308) listed _M. p. leucopterus_ from Jaral.
Findley saw Mockingbirds 2 mi. S and 3 mi. E San Juan de Sabinas on
June 22, 1952. Dickerman saw Mockingbirds in the Sierra del Pino on May
12, 1954, and 8 mi. E and 2 mi. S Americanos on May 18, 1954. The sizes
of the testes (8, 7 mm.) of Nos. 32094 and 32096, respectively, suggest
breeding 2 mi. W Jimenez and 5 mi. N and 19 mi. W Cuatro Cienegas, as
does No. 32095, a juvenile.

*_Toxostoma longirostre sennetti_ (Ridgway).--_Specimen examined:_ one,
[Male] 32090, from 2 mi. S, 3 mi. E San Juan de Sabinas, June 22, 1952.

In Coahuila the Long-billed Thrasher seems to be uncommon. It has been
recorded in Coahuila as far west as San Juan de Sabinas. Ridgway
(1907:192) recorded _T. l. sennetti_ from Sabinas, the only other
record of the Long-billed Thrasher, to my knowledge, from the State.
The large size of the testes (11x6 mm.) of No. 32090 and the date (June
22) on which it was obtained suggest that _T. l. sennetti_ breeds 2 mi.
S and 3 mi. E San Juan de Sabinas.

*_Toxostoma curvirostre celsum_ Moore.--_Specimens examined:_ total 2:
[Female] 31071 from 7 mi. S, 2 mi. E Boquillas, March 1, 1952, wing,
111 mm., tail, 114 mm., weight, 97.2 gms.; and [Female] 31072 (skeleton
only) from 10 mi. S, 5 mi. E Boquillas, 1500 ft., March 5, 1952.

This subspecies of the Curve-billed Thrasher occurs in northwestern
Coahuila. Specimens of _T. c. celsum_ and _oberholseri_ from Coahuila
are too few to show clearly the distribution and intergradation in
Coahuila.

No. 31071 is referred to _T. c. celsum_ because of large size; the
spots on its upper abdomen, which are large and pronounced, suggest a
relationship with _T. c. oberholseri_. Miller (1955a:170) remarked that
_T. c. celsum_ was a scarce resident of the desert scrub at the mouth
of Boquillas Canyon of the Sierra del Carmen.

*_Toxostoma curvirostre oberholseri_ Law.--_Specimens examined:_ total
5: [Female] 35405 (skeleton only) from 4 mi. N San Isidro, May 11,
1954; [Female] 32091 from 5 mi. N, 19 mi. W Cuatro Cienegas, 3250 ft.,
July 5, 1952; [Male] 32833 from Parras, July 4, 1955, weight, 76.5
gms.; [Female]