AYES. 
69 
Thamnoplnlus mosstus ia a now specioH from Cayenne, resembling T. luctu- 
osns, but clilfering in the shorter bill, less developed crest, and dull white 
spots on the wing-coverts; it dillers also from T. tschvdii (vide mprh) in its 
shorter bill, the bend of the wing and wing-coverts being less white, the 
want of the white edge of the remiges, and from both species in the broad 
white terminal portion of the rectrices. Id. op. cit. p. 141, note. 
Thamnophilus virgatus is described as a new species from New Granada, re- 
sembling T. palliatus in general coloration ; but it is smaller and differs notably 
in the wdiite markings, in the strongly defined stripes on the crown, and the 
paler and duller tint of the red. G. N. Lawrence, Proc. Ac. N. S. Philad. 
1808 (not published till 1809), p. 300. 
Dgsilhamnus affinis is an undescribed species from Brazil, differing from D. 
mentalis (Temm.) through the want of a yellow lower belly, and through the 
blackish-grey crown in the cf , while the 5 f*^iso sufficiently distinct. From 
D. olivaceus, Tschudi, it also differs through the grey upper surface and the 
dark ear-spot of the cf . It resembles D. semiciney'eus, but has n stouter bill 
and other distinguishing characters. A. von Pelzeln, Orn. Bras. pp. 80, 149, 
160. 
Jlcrpsilodimus atricapiUus, II. longirostris, and II. dorsimacidatm, Natter.,’^ 
are three undescribed species from Brazil : the Jirst like II. pilealm (Licht.), 
but with longer wings and tail, and the $ being ochraceous benentli; in the 
second tlie J resembles the first, but has a much stronger and higlier bill, 
white lores, and the outer rectrices halfway white, it diflers also from II. 
2)cctoralis, Scl., d , by wanting the black pectoral spot ; the third differs from 
II. pileatus by the feathers of the back being longitudinally spotted with 
black and white, and the inner rectrices have also two or three white longi- 
tudinal spots. Id. op. cit. pp. 80, 160-152. 
Myrmothervla assimiiis, “ M. Inctuosa (Temm.),” and 31. longipcnnis are 
three undescribed species from Brazil. The Jirst is very like 31. hnuxivelli, 
Scl., but ha*s a longer tail of twelve rectrices, and the secondaries and upper 
tail-coverts are not spotted with white, the 5 is more ash-coloured above 
and paler below ; the second differs from 31. axillaris (Vieill.) by wanting the 
white sides and by the body being of a darker grey ; the third resembles 31. 
menetriesi (B’Orb.), but has much longer wings. Id. op. cit. pp. 81, 82, 162- 
164. 
Formicivora inelanogaster, Natter.,” F. Icucophthalma, and F. rijicanda 
and F. hicolor, Natter.,” are four undescribed species from Brazil. The cf of 
the Jirst, which may possibly be Myiothera super ciliaris, Pr. Max. (nee Licht.), 
differs from F. grisea (Bodd.) by being darker above, the absence of the white 
beneath, and the last secondaries being edged wdth white, while the 2 iias 
the sides of the head brown and is white beneath ; from F. rufatra it differs 
by being dark and not reddish above. The second and third are not compa- 
ratively differentiated. The fourth diflers from F. quixensis (Corn.) by tho 
lower surface of the 2 ^cing rufous, from F. consohrina, Scl., by its larger 
size, and from F. houcardi, Scl., by the paler lower surface of the $ , and 
from all these by the nearly white lateral rectrices. Id. op. cit. pp. 83, 84, 
164-157. 
Formicivora strigilata (c? & 5) is figured. P. L. Sclater & 0. Salvin, Ex. 
Orn. p. 159, pi. Ixxx. 
“ Terenura melanohuca (Natter.) ” is an undescribed species from Brazil. 
A. von Pelzeln, Orn. Bras. pp. 84, 167. 
