( 37(5 ) 



Nos. 1146, 1175. c?c? juv., Humaytha, 23, 28. viii. 06. "Iris grey, feet 

 grey-brown, bill black." 



Nos. 997, 1013, 1014, 1066, 1007, 1231. ? ?, Hnmaytha, 27, 20. vii., 9. viii., 

 13. ix. 06. "Iris grey or greyish brown, feet grey or yellowish grey, bill black, 

 below greyish."— Wing 67—70, tail 50—54, bill 20—22 mm. 



No. 1315. ? iuiin., Paraizo, 24. x. 00. Soft parts as above. — Wing 701, 

 bill 21 mm. 



<S ad. In coloration similar to S. s. leucostigma (Pelz.), but the tail considerably 

 shorter. 



¥ ad. Top of the head and back pale brown, sometimes with a slight nifesccnt 

 tinge on the latter; upper wing-coverts warm rufescent brown, with large, rounded, 

 apical spots of fulvous; quills dusky, exteriorly edged with rufescent brown. Tail 

 dull dusky, the two outer rectrices occasionally with a narrow buff apical margin. 

 Lores and sides of the head ochraceous buff, on the posterior portion of the ear- 

 coverts a distinct patch, of pale brown. Malar region, sides of the neck and the 

 whole uuder-surface bright ochraceous, deepest (about " tawny ochraceous," Ridgw. 

 v. 4) on the sides of the neck and belly, paler, more ochraceous buff (Ridgw. v. lU) 

 on the throat and middle of the abdomen. Axillaries and under wing-coverts 

 pale ochraceous buff clouded with greyish. 



Type of subspecies: No. 1067, ? ad., Humaytha, 0. viii. 06. 

 The adult males of this interesting new form do not differ in coloration from 

 a good scries of S. s. leucostigma from British Guiana, < 'avenue, and the Rio Negro 

 district. The under parts are of the same light cinereous, passing into whitish 

 grey in the middle of the abdomen, and the upper surface shows exactly the 

 same shade of slate-grey. The size of the white apical spots on the wing-coverts 

 is rather variable. In two specimens they are quite as large as in our series from 

 the Guianas, in two others decidedly smaller, though still considerably larger than 

 in 8. s. schistacea. The under mandible is whitish, as in S. s. leucostigma. From 

 this form the present series differs, however, at a glance by its shorter tail. 



The females are readily distinguishable from those of all the other forms 

 by having the top of the head pale brown like the back (not slate-colour). More- 

 over, the lores are buff (not greyish) ; the sides of the head ochraceous buff with 

 a brown patch on the posterior end of the ear-coverts (instead of being uniform 

 dark slate-grey) ; the malar region is ochraceous (not slate-grey) ; the under- 

 surface bright ochraceous (instead of deep ferruginous) ; and the back much 

 ]>aler, light rufescent brown (uot dee]) rufous brown). 



The under mandible is whitish as in S. s. leucostigma, while in the shortness 

 of the tail the new form agrees with S. s. subplumbea.. 



In Not: it. Zool. xiii. 1900. pp. 344-7, I gave a review of the four geographical 

 forms then known, to which S. *. caurensis Hcllm.,* from the Caura It., Venezuela, 

 aud S. s. humaythae are to be added now. 



0o. Sclateria schistacea leucostigma (Pelz.). 



/'. , i tola ' \tigma Pelzeln, /.m- Ornith. tim*. ii. p. lilo ( 18iiK.— liarra do Rio Negro, Marabitanas, 



Rio V.ui|" : . i layenne), 



Noi 13;:.'. & ad., Borba, 20, xi. 06. " Iris greyish brown, feet pile yellowish 

 red, bill black." — Wing 72; tail On ; bill 21 nun. 



♦ Bull, Br, I. Or,,. CI xix. p. 9. 



