( o" ) 



On corapariiijj this scries with fifteen specimens IVdiii Tobago I tail to see .any 

 ilifierence, and cannot, therefore, admit the validity oi 1>. co/isol/rim/s Ualni. 



The form fonnd on the opposite mainland, near (Inmana, Matnrin, and in the 

 Orinoco delta ((tuanoco), however, is ajiparently dillerent and worthy of recognition. 

 Ir ditVers in its more fnlvons nnder-jiarts, tliis lieing especially nutiecahle on tlie 

 throat, which is distinctly bntV (instead of wiiitish), and more rnfesient back. This 

 subspecies has to stand as A susurransjardinei Dalm. 



At my reipiest, Mr. Oberholser examined t\\o types of yasicK ulbisquama 

 in the Lafresnaye collection, and found them to be identical with tlie white-throated 

 Tobago form. Jlost probably, Lafresnaye's types came from Trinidail. 



80. Picolaptes alboliueatus (Lafr.). 



Vewlri'Culaj.tm (illuJhiriilim Lafresnaye, lifi: Znnl. ItSiCi. p. 208 [" Colonihie on Mexique.''— We 

 accept liiiijiild !Lt tlie typical loc.ility]. 



2 S (S and 1 ? from Caparo, April : exactly agreeing with three adults from 

 Cumauii. 



Bogota skins and several examples from West Colombia differ slightly in 

 having the back rather more rnfescent and the under-jiarts darker brown, with the 

 whitish longitudinal streaks somewhat broader. Two s]iecimens from Valencia 

 appear to be identical with those from Bogota. 



A much larger series is necessary to decide whether there are any geographical 

 races of this .sjiecies or not. 



00. Thamnophilus major semifasciatus (Cab.). 



[Thamnophihis major Viuillot, .V<///i'. Did. iii. (181IJ) p. .'513 (ex Azara : Paraguay).] 



Diallactes neiiii/iisiititiis Cabanis, J on in. f. Oniith. I87'2. p. 234 ['' Para, Guiana and Venezuela "]. 



Thamniiplidiis iilbhris.<ux Ridgway, Prnr, C.S. .!/«<. xiv. (1891) p. 481 [Trinidad]. 



6 S ad. and o ? ? from Cajiaro, April. 



In the markings of the tail they agree with a series from Venezuela (Cnmana 

 and E. Orinoco), liritish Guiana, Cayenne, and Para. Typical 7'. m. imijor \ie\\\. 

 of Paraguay, Mattogrosso and Bahia has much more white in the tail, broader white 

 edges to the primaries and, as a rale, a smaller bill. 



01. Thamnophilus doliatus (Linn.). 



Liiiiiiis ihiVHitun Linnaeus, Mim. Ail. Fmli . ii. I'lodr. p. 12 (17t'i4) [Inc. ij^n.— We substitute Surinam. 



as the typical locrdity]. 

 Thamnoj)liilus (loliiilu* fr'iterrulun IJerlepsch Ji Hartert, Xov. yinnl. ix. (10o2) p. 70 [Orinoco River]. 



25 (J ad. and jnv., IT ? ? from Caparo, April and May; and Seelet, April ; 

 1 6 ad., 1 ?, Pointe Gourde, January ; 1 J ad. from Laventille, December. 



With a series of seventy adult males liefore me, I can no longer distinguish the 

 form named T. d. J'niterculus by Berlejjsch and Hartert. In some cases, the 

 specimens from Cayenne, Surinam and Trinidad have rather broader bars on 

 the lower surface tiian those from Venezuela, but so many of them are ipiite 

 indistinguishable from the latter that 1 cannot make any separation. Birds from 

 Tobago agree better with the narniwly-barrcd form of the mainland. 



