(312) 
Although Mr. Ridgway compared his type with S. ¢. rosenbergi (Hart.), of 
Western Ecuador, the two birds have very little in common. S. ¢. olivaceus is 
exceedingly close to S. t. wallacii, which is also geographically the nearest. Yet my 
eight specimens (two from Caura, six from Brit, Guiana) differ by having the throat 
and foreneck much more conspicuously tinged with brownish, as well as by their 
duller, brownish olive back. In the latter respect they approach S. ¢. amazonum, 
but may be distinguished by the absence of cinnamomeous on the crown. Two of 
the skins are, however, scarcely different from wallaci’. The specimens from British 
Guiana are in every way identical with the two topotypes from the Caura 
River. 
143. Heterocercus linteatus (Strickl.). 
Elaenia linteata Strickland, Contrib. Ornith. for 1850. Iilustr. p. 121. tab, fig. sin. (part. :¢— from 
the upper branches of the Amazon River oa 3 
Heterocercus linteatus Hellmayr, I.c. p. 362 (Humaytha) ; Pelzeln, Lc. p. 125 (Borba). 
Nos. 985, 1021, 1027. oo ad., Maruins, 9, 16, 17. vii. 1908.—Wing 89—90 ; 
tail 54; bill 12—134 mm. “ Iris brown, feet and bill black,” 
Nos. 1007, 1017. 29 ad, Maruins, 12, 14. vii. 1908.—Wing 83, 86; tail 
52, 54; bill 13 mm. 
No. 793. % ad., Allianca, 9. xi. 1907.—Wing 83; tail 51; bill 13 mm. 
Until recently this beautiful Species was only known from the Rio Madeira. 
Miss Snethlage, however, has lately obtained specimens at Monte Alegre, on the 
Lower Amazons,* and found it common on the Tapajéz: Villa Braga, Goyana, 
Ilha do Papageio, and Ilha do Coata.+ 
(144. Tityra cayana (Linn.). 
Lanius Cayanus Linnaeus, Syst. Nat. xii. 1, p, 137 (1766.—ex Brisson : “ Cayania re 
Tityra cayana Pelzeln, U.c. p. 119 (Borba). 
Right bank: Borba (Natterer), 
The single adult male in the Vienna Museum agrees, in size and colour of 
the bill, with specimens from French Guiana, Venezuela (Canra), ete. The basal 
portion of both mandibles (for about 16 mm.) is reddish yellow, the remainder 
black. ] 
145. Tityra semifasciata semifasciata (Spix). 
paar a semifasciatus Spix, Av, Bras. ii. p. 32. pl. xliv. fig. 2 (1825.—‘‘in provincia 
Para”), ; 
Tityra semifasciata semifasciata Hellmayr, Nov. Zool, xiy. p. 363 (Humaytha), 
No. 431. 3 ad., Calama, 19. viii. 1907.—Wing 119 ; tail 72; bill 26 mm. 
No. 810. 3 ad., Allianca, 2. xii. 1907.—Wing 118; tail 72; bill 24 mm. 
“Tris yellowish red, feet dark grey, bill greyish red.” 
Typical of 7. s. semifasciata. Of. my revision of Spix’s types, p. 668. 
[146. Tityra leucura Pelz. 
Tityra (Erator) leucwra Pelzeln, Zur Orn. Bras. ii, pp. 120, 183 (1868,—Salto do Girao, Rio 
Madeira). 
Right bank: Salto do Girao (Natterer), 
Natterer obtained, in October 1829, a single immature male which is still 
* Journ. f. Orn. 1907. p. 289. T Journ. f. Orn. 1908, p. 504, 
