( 336 ) 



36. Dendrocolaptes atrirostris LhIV. ^t iruili. should be Deudi'ociucla atrirostris 



(Lair, it D'Oib.). 



DcudrocohqiUs (drirostrh Lafrcsuaye & D'Orbigny, Sijn. Ai: u. in .l/n;/. /C<'<il. 1K!8. cl. ii. p. 12 

 [Guarayos, rep. BoUviaiia] ; D'Orbigny, Voi/titjc, 0,\. p. 30'.l, tab. 54, fig. 1 (fig. pussirna!). 



Dendrmimht aliinislris Ridgway, P. U. S. Mils. x. 1887. (1888), p. 4'.IU, 4;i;! ; Meuugau.v ut llullniayr, 

 Mem. S.ic. hist. mil. Aiiluii. .\i.K. (I'jllli), p. 1^!0 (crit.). 



D. m/no;- Pelzcln, Ziir nrii'dk. Ihusil. i. (1807), p. (iO [S. Viccnlc, Matlogrosso]. 



D.finiiiijatu idoui, /. r. p. 42 [part. ; spucimeu e.\ 8. Vkintc]. 



Wing. Tail. Liill. 



1. Mils. I'aris. >Siiec. Inj). (mounted), lalielled : 

 "Giuiriiyon, Bolivic, D'Orbigny. DciulrflcolajiU'.'i 



atr/rosfr/.s, nob. (type)" '•'■' '"' -'' "i"'- 



•2. Mns. Vindob. No. I.">s92. Type oi' D. minor l\-h. 

 ? juv. " S. Vicente, December 1820." Natt. coll. 

 * 3. Mus. Vindob. No. 15899. ? ad. " S. Vicente, 

 December 182G." Natterer coll. 



4. Mus. H. V. Berlepscli. No. 1257. G. Garlejip cull. 



(? jnv. " S. Mateo, Bolivia, August 10, 1891 " . 



5. Mus. H. V. Berlepscb. No. 1113. G. Garlepp coll. 



¥ . " S. Mateo, Bolivia, July 20, 1891 " 



There can be no doubt that Dendrocincla minor of Pelzeln is identical with 

 D. atrirostris (Lafr. & D'Orb.). Both species are based on immature specimens 

 with the bill entirely blackish. In the adult, the upper mandible is dark brownish 

 lioru-colour, the lower one, except the gonydeal angle, yellowish white (No. 3 of 

 the above list). No. 4 agrees with the types of atrirostris and minor in having 

 the bill entirely blackish. In No. 5 only the upper mandible and the basal half 

 of the lower jaw are blackish, the apical half of the latter being yellowish white ; 

 thus the coloration of the liill is intermediate between that of No. 3 and that of 

 Nos. 1 and 2. 



The black-billed specimens (Nos. 1, 2, and 4) have a distinct oclireous patch or 

 sufl'usiun on the occiput, a sign of immaturity, also to be seen in young examples 

 of D.fuliginosa, phaeockroa, and olicacea. In No. 4 it is barely indicated, and in 

 No. 3 there is no trace of it. 



In coloration, the skins from Mattogrosso are practically identical with the 

 typical birds from Bolivia. The type of D. minor has a decidedly shorter tail than 

 the others, but this is doubtless due to its being very young. 



In all essential particulars the five skins before me are very uniform : forehead 

 and crown finely striated with buffy ; from behind the eye along the upjier margin 

 of the ear-coverts a broad ochraceous-buff jjostocular streak ; throat rather paler 

 than the rest of the under parts, and slightly mixed with greyish ; jugulum with 

 hair-like, buffy shaft-lines ; exposed portion of the remigcs clear cinnamon rufous 

 without any olivaceous tinge, but rather paler than tlic tail. 



D. atrirostris is evidently the western representative of J>. turdimi, with which 

 it shares the pale striations on the crown ; it differs, however, by its broad ochraceous 

 postocular Btrijie, and in having the outer webs of the quills and the tertials pure 

 cinnamon-rufous (instead of olivaceous brown, scarcely different from the colour of 



* It is interesting to observe tliat ilic collector of tiie speeiraen.s, Natlerei', correctly recognised tbeni 

 as belonging to the same speeies, both being marked by bim with number " 705." 



