50 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 74 



Basilcutcrus diachlorus (not of Cabanis) Sclater and Salvtn, Proc. Zool. 

 • Soc. London, 1879, p. 594 (Simacu and Consata, Bolivia). 



Ba»ileuterus bivittatus bimttatus Hartert and Ventxiri, Nov. Zool., vol. 16, 

 1909, p. 167 (Ledesma [Jujuy] and Rio Bermejo [Salta], Argentina. — 

 DiNELLi, El Hornero, vol. 1, 1918, p. 61 (Tafi Viejo, TucumJiu, Argentina ; 

 descr. nest and eggs). — Heixmayk, Arcli. f. Naturg., vol. 85, A, 1919, p. 6, in 

 text (crit.) ; Nov. Zool., vol. 32, 1925, p. 181 (crit. on type, etc.). 



Description. — Pileum with two black lateral stripes extending to 

 the nape, and inclosing an oblong coronal spot which varies in color 

 from Mars yellow to lemon chrome ; a short transocular stripe dusky ; 

 short and narrow superciliaries and spot below the eye pale yellow; 

 sides of the head and neck, hindneck (behind the vertical ?pot), and 

 upper parts in general, dull warbler green to bright olive green, in- 

 cluding wings and tail externally; under parts lemon chrome, the 

 sides and flanks washed with pyrite yellow; under wing-coverts dull 

 pyrite yellow; "iris brown; bill black; feet pale brownish yellow.*' 



Measurements. — Male: Wing, 65-71 (average, 68); tail, 57-64 

 (60.5); bill, 11-12 (11.5); tarsus, 21.5-22.5 (22). Female: Wing, 

 61-67 (63.5); tail, 5^62 (58): bill, 11-11.5 (11); tarsus, 20.5-22.5 

 (21.5). 



Range. — From southeastern Peru through central Bolivia (Yungas 

 of Cochabamba), and south to the Province of Salta in Argentina, 

 in the Tropical Zone. 



Remarks. — Basileutei'us hivittatus differs from B. coronatus in a 

 direction exactly opposite from that of B. fraseri, for it lacks any 

 gray color whatever in the plumage, being wholly greenish above 

 and yellow below, while retaining the coronal spot, black lateral 

 crown-stripes, and an indication of a dark transocular stripe. It 

 thus leads off from the B. coronatus group in the direction of 

 Myiothlypis., just as B. fraseri leads off toward Euthlypls. It ap- 

 pears to be in the main a Tropical Zone form, peculiar to the eastern 

 foothills of the Andes of southeastern Peru and Bolivia, ranging 

 thence to northern Argentina. It was discovered b}- D'Orbigny in 

 Bolivia, and described as a Mu^cicapa, its real affinities remaining 

 unrecognized until pointed out by Baird in 1865, although he had 

 not seen a specimen. Doctor Hellmaj'r now finds that the example 

 described as the female of this species by Lafresnaye and D'Orbigny 

 is really a specimen of Basileutei^s faveohis. but fortunately this 

 will not affect the names. Virtually the only variation observable 

 in the series of specimens examined (all but five from Bolivia) is 

 that affecting the color of the coronal spot, which runs from bright 

 yellow to dull orange, and the extent and intensity of the black 

 lateral crown-stripes. 



Specimens examined. — Peru: Rio Inambari (2,200 feet), 3. Bo 

 livia: Machareti, 1; Yacuiba, 5; Cerro Hosane, 9: Samaipata, 4; 



