182 



U. S. p. R. R, EXP. AND SURVEYS — ZOOLOGY — GENERAX, 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 crintius, 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 lawrencii. 



List of specimens. 



SAYORNIS, Bonaparte. 



Sayornis, Bonap. .> Ateneo italiano, 1854. — Ib. Comptes Rendus, 1854, Notes Cm. Delattre. 

 ^ulanax, Cabanis, Journal fur Orn. 1856, 1, (type nigricans.) 



Ch. — Head with a blfnded 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 iS'. nigricans. 



Brownish olive above; crown darker ; beneath and edge of tail yellowish.. /S'./wscw. 



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, where he names Sayomis 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 genus. 



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. 



7226 

 7219 

 4005 



do. 

 7943 



957 



do. 

 1339 



do. 

 2451 

 9102 



Species. 



Sayornis sayus . . 

 Sayomis nigricans 

 do 



do 



do 



Sayornis fuscus. 

 do 



..do. 

 ..do. 

 ..do. 

 ..do. 



Locality. 



Tfjon valley... 

 Sac. valley. .. . 

 Cadereita, Mexico 



do 



Mexico 



Carlisle, Peon. 



do 



do ... 



do 



.do. 



Mexico . 



Length 



6.50 



6.40 



6.04 



7. 



6.40 



6.75 



5.911 



6.86 



Extent. Wing 



, , 4.00 



< 3.64 



i 3.32 



I 

 11.75 3.25 



I 3.32 



3.38 



11. j 3.41 



I 3.26 



10.83 3.33 



• 3.30 



3.22 



Tail. 



3.46 

 3.54 

 3.06 



3.22 

 3.24 



3 16 

 3.30 



Tarsus 



0.80 

 0.74 

 0.66 



0.66 

 0.70 



0.66 



0.70 

 0.60 



Middle Its claw, 

 toe. I 



0.64 

 0.60 ! 

 0.54 ! 



0.22 

 0.22 

 0.20 



0.64 0.24 

 0.6U 0.20 



0.54 ! 



0.24 



0.58 

 0.56 



0.22 

 0.20 



Bill 

 above, 



0.56 

 0.60 

 0.60 



0.54 

 0.54 



0.50 

 0.54 



Along 

 gape. 



0.62 

 0.82 

 0.80 



0.72 

 0.80 



0.82 



0.74 

 0.80 



Specimen 

 measured. 



Dry. 

 Dry. 

 Dry. 



Fresh. 

 Dry... 

 Dry... 

 Fresh . 

 Dry..., 

 Fresh. 

 Dry.,., 

 Dry..., 



Remarks. 



Poor spe- 

 cimen. 



