CHERRIE: ORNITHOLOGY OF THE ORINOCO REGION. 2JI 
Dendrocolaptes certhia (Boddaert). 
Picus certhia Bodd., Tabl. PL Enl. 1783. p. i^. 
Dendrocolaptes certhia Berlepsch & Hartert, p. 68. 
Common on the upper river. Observed from near the mouth of 
the Meta River up as far as specimens were collected at .Malaben. 
Xericagua and Munduapo. 
Berlepsch and Hartert record specimens collected at Suapure, 
Nicare and La Pricion on the Caura River. 
FOR!\IIC.\RIIDAE— AXT-THRUSHES. 
Berlepsch and Hartert's paper listed forty-two species and sub- 
species as representatives of sixteen genera. Of that number, the 
writer collected twenty-eight species and subspecies pertaining to four- 
teen genera, on the Orinoco proper. 
Fifty-six species and subspecies are included in the present list, and 
there is no doubt that a good many more will be added to the list as 
soon as careful collecting will have been done throughout the entire re- 
gion. 
As was to have been expected, since the Ant-thrushes are 
chiefly birds of the thick forest, members of this family were not found 
abundantly either as species or as individuals, until after we had pene- 
trated to the heavily forested regions of the upper Orinoco. 
In all my experience as a collector, I have learned but little regard- 
ing the nesting habits of birds of this group and regret to be able to add 
so little at the present time. 
Key to Genera, Species and Subspecies of Formicariidae. 
a. "Second phalanx of middle toe entirely free from outer toe; acrotarsium 
more or less distinctly scutellate (at least on inner side) . " ' 
6. Posterior edge of planta tarsi rounded (not booted) Rhopolerpelorquala lorquala. 
b'. Posterior side of planta tarsi with a sharp edge. 
c. "Nostrils oval or rounded and without operculum (or if present 
not well developed) or other adjacent soft membrane. "- 
d. Conspicuously barred above and below. 
e. Crown and occiput uniform black or hazel brown (no white 
bases to crown or occiput feathers) Cymbilaimus lineatus lineatus. 
e'. Crownand occiput black. featherswithwhitebases cS'Thamnopkilus doliatus. 
d'. Not conspicuously barred either above or below. 
e. wing coverts without white tips or other markings (males of 
7*. murinus have nearly obsolete small pale tips to wing 
coverts^ and usually uniform with outer edges of quills. 
/. Wing more than 65 mm. 
g. Under parts white 9 Taraba major albicrissa. 
■From Ridgway's " Key to the Genera of Formicariidae" Birds of N. and M. Amer. V.: 19U: p. 10. 
-Ridgway 1. c. 
(.Cymbilaimus. Pygiptila. Hypolophus. Thammphilus. Sdaieria° Erionotus, Rhopochares. Dysithamnus.) 
°Mr. Ridgway in his "key" to the Formicariidae placed Sclaleria tentatively in the section having the 
second phalanx of the middle toe partly united to the outer toe and the acrotarsium fused, but I find in the 
two forms examined (5. argentata and 5. schistacea saturaia) that the second phalanx of the middle toe is 
entirely free from the outer toe and the divisions of the acrotarsium are not obsolete. 
