TYRANNUS. 103 
other. At Duefias, in Guatemala, it builds in May an open nest of slight structure, 
composed chiefly of small sticks and dried roots, with a little horse-hair for a lining. 
It is placed at the end of a branch of a low tree, at various heights from the ground. 
The eggs, usually four in number, are creamy white spotted with three shades of red. 
B. Rostrum incrassatum. 
6. Tyrannus crassirostris. 
Tyrannus crassirostris, Sw. Quart. Journ. Se. xx. p. 2781; Phil. Mag. new ser. i. p. 3687; Scl. & 
Salv. Ibis, 1860, p. 399°; Scl. P. Z. S. 1862, p.19*; Cat. Birds Brit. Mus. xiv. p. 271°; 
Lawr. Mem. Bost. Soc. N. H. ii. p. 288°; Bull. U. S. Nat. Mus. no. 4, p. 287; F.-Perez, 
Pr. U.S. Nat. Mus. ix. p. 155°. 
Melittarchus crassirostris, Cab. & Heine, Mus. Hein. ii. p. 80°. 
Megarhynchus crassirostris, Finsch, Abh. nat. Bremen, 1870, p. 829°°. 
Muscicapa gnatho, Licht. Mus. Berol.” 
Supra brunneus ; dorso medio olivaceo vix tincto; capite summo nigricanti-brunneo, crista celata flava 
ornato; alis et cauda nigricanti-fuscis; regione parotica nigra: subtus flavus; gutture albo; pectore 
cinerescente ; subalaribus flavis: rostro et pedibus nigris. Long. tota 9-0, ale 5:2, caudex 4:1, tarsi 0°8, 
rostri a rictu 1-2. (Descr. maris ex Tehuantepec. Mus. nostr.) 
@ mari similis. 
Hab. Muxtco, Sauz in Sinaloa (W. Lloyd), Mazatlan (Grayson °, Forrer), Chilpancingo, 
Omilteme and Acaguisotla in Guerrero (Mrs. H. H. Smith), San Juan del Rio 
(Rébouch), Chietla (Lerrari-Perez), Oaxaca (Boucard+), Cacoprieto, Chihuitan 7, 
Los Cues‘ (Sumichrast); Guatemata, Escuintla (0. 8.3), 
This is a species exclusively found on the western side of the cordillera of Mexico 
from Western Sonora in the north to the Isthmus of Tehuantepec, and thence to 
Western Guatemala, where we found it on one occasion at Escuintla, in the forest 
region bordering the Pacific °. 
Grayson met with it on the banks of the Rio Mazatlan, where he says it frequents 
the tops of the loftiest trees, preferring a withered branch for its perch, whence to 
watch for passing insects, which it seizes in the air, and returning to its perch beats 
to death against the branch and swallows entire. During the breeding-season pairs 
consort together, and are very tyrannical, attacking with great ferocity every bird that 
passes too near their domicile ®, 
The species is probably resident wherever it is found, and resorts chiefly to the low- 
lands, but ascends the mountains up to an elevation of 8000 feet above the sea. 
7. Tyrannus magnirostris. 
Tyrannus magnirostris, @’Orb. in R. de la Sagra’s Hist. Fis. y Pol. de Cuba, iti. p. 69, t. 137; 
Bryant, Pr. Bost. Soc. N. H. xi. p. 667; Cory, Auk, 1886, p. 243°; Scl. Cat. Birds Brit. 
Mus. xiv. p. 273%. 
Melittarchus magnirostris, Cab. J. £. Orn. 1855, p. 477°; Gundl. Orn. Cub. p. 73°, 
