182 



U. S. p. R. R. EXP, AND SURVEYS — ZOOLOGY — GENERAL REPORT. 



to the tips, with a narrow edging only of reddish, instead, as in both the other species, of 

 having the entire inner webs of most of these feathers light cinnamon. The bill is shaped as 

 in crinitus, but the edges are slightly convex instead of straight ; it is broader than in mexi- 

 canus. 



It is probable that the male of this species is somewhat differently colored from the female 

 described above. 



It is not improbable that this bird may belong to the genus Blacicus of Cabanis (Journal fiir 

 Ornithologie III, Nov. 1855, 480,) characterized as having the wings shorter than in 3Iyiar- 

 chus ; the bill much depressed, flat, and broad ; the tail somewhat emarginated. In this event, 

 and should the genus be considered worthy of retention, the present species will be called 

 Blacicus latvrencii. 



List of specimens. 



SAYORNIS, Bonaparte. 



Sayornis, Bonap. .'Ateneo italiano, 1854. — Ib. Comptes Rendus, 1854, Notes Cm. Delattrc. 

 Jlulanax, Cabanis, Journal fur Cm. 1856, 1, (type nigricans.) 



Ch. — Head with a blended depressed moderate crest. Tarsus decidedly longer than middle toe, which is scarcely longer 

 than the hind toe. Bill rather narrow ; width at base about half the culmen. Tail broad, long, slightly forked ; equal to the 

 wings, which are moderately pointed, and reach to the middle of the tail. First primary shorter than the sixth. 



This genus agrees with the preceding in the length of the broad tail, but has a longer tarsus 

 and a different style of coloration. The species are distinguished as follows : 



Sooty black ; belly and edge of the tail pure white S. nigricans. 



Brownish olive above ; crown darker ; beneath and edge of tail yellowish.. aS'. fuscus. 



Grayish brown ; belly reddish cinnamon S. sayus. 



This genus I first find referred to by Bonaparte in the notice of Delattres' collections, in 

 Comptes rendus, 1854, Avhere he names Sayornis nigricans. I am, however, inclined to believe 

 that he has given a conspectus of the Tyrants in the Paris Ateneo italiano for 1854, and in it 

 this gentis. 



Cabanis calls the supposed " Tyrannula fusca" of Cuba Aulanax fuscus, and claims the " T. 

 nigricans" as type if Bonaparte's name be untenable. 



Comparative measurements of the species. 



Catal , 

 No. 



72i28 

 72l» 

 4005 



Species. 



SaynrniH sayus . . 

 Sayornis nigricans 

 do 



do do 



7943 do 



957 I Sayornis fuscus. 



do. I do 



1339 do. 



do. 

 2451 



..do. 

 .do. 

 ..do. 



Locality. 



Tejon valley.. . 

 Sac. valley. .. . 

 Cadereita, Mexico 



do 



Mexico 



Carlisle, Tenn. 



do 



do .... 



do 



do 



Mexico 



Length 



6.84 



6.8a 



0.60 



e.m 



6.40 



6.04 



7. 



6.40 



0.75 



5.90 



6.86 



Extent. Wing. 



I 4.00 



3.64 



3.33 



11.75 3.25 



3.3t2 



3.38 



11. 3.41 



3.28 



10.83 3.33 



3.30 



3.22 



3.46 

 3.54 

 3.06 



3.22 

 3.24 



3.16 



3.16 

 3.30 



0.80 

 0.74 

 0.C6 



0.66 

 0.70 



0.66 



0.70 

 O.UO 



Middle Its claw, 

 toe. 



0.64 

 0.60 

 0.54 



0.22 

 0.22 

 0.2U 



Bill 

 above. 



0.56 

 0.60 

 0.60 



I 



0.64 

 O.GO 



0.24 

 0.20 



0.51 

 0.54 



0..'-.8 

 0.56 



0.22 

 0.20 



0..50 

 0.54 



Along 

 gape. 



0.82 

 0.82 



o.eo 



0.73 

 0.80 



0.74 

 0.80 



Specimen Remarks, 

 measured. 



Dry. 

 Dry. 

 Dry. 



Fresh. 

 Dry... 

 Dry . . . 

 Krcsli , 

 Dry..., 

 Frctb . 

 Dry..., 

 Dry.... 



Poor spe- 

 cimen. ' 



