Todd — Diagnoses of New Birds from Tropical America. 171 



Rhynchocyclus flaviventris aurulentus subsp. nov. 



Similar to Rhynchocyclus flaviventris flaviventris (Wied), hut general 

 coloration much brighter, more yellowish. 



Type, Nd. 38,717, Collection Carnegie Museum, adult male; Mamotoco, 

 Santa Marta, Colombia, April 10, litli'; M. A. Carriker, Jr. 



I.lania boliviana sp. nov. 



Above plain ilnll grayish olivaceous, tin' pileum slightly hut distinctly 

 crested, without concealed white patch; wings and tail clove brown, 

 with grayish or olivaceous edgings, the former with the lesser, middle, 

 and greater coverts tipped with whitish and the inner secondaries edged 

 externally with the same color; throat pale grayish white, deepening into 

 gray on the breast, and passing into pale yellow on the abdomen and 

 under tail-coverts. Wing, 86 mm.; tail, 79 mm. 



Type, No. .">1.'_'7S, Collection Carnegie Museum, adult female; Puerto 

 Snare/., Bolivia, December 7, 1908; Jose Steinbach. 



Leptopogon amaurocephalus diversus subsp. nov. 



Similar to Leptopogon amaurocephalus amaurocephalus Cabanis, hut 

 smaller, the hack slightly darker green, the cap very much darker brown, 

 the under surface paler yellow posteriorly, and the rectrices edged inter- 

 nally with bully. 



Type, No. 38,712, Collection Carnegie Museum, adult male; Mamotoco, 

 Santa Marta, Colombia, April lit, 1912; M. A. Carriker, Jr. 



Myiarchus (?) fortirostris sp. nov. 



Nearest Myiarchus ferox ferocior Cabanis in general coloration, hut 

 paler and more greenish above, with the wing-edgings somewhat more 

 prominent. Bill much paler ami very differently shaped, however, 

 Ijeing shorter, stouter, and relatively higher, with the culmen more 

 rounded and the tip less strongly hooked. 



Type, No. .".s,L , L > •_ , , Collection Carnegie Museum, adult male; Provence 

 del Sara, Bolivia, October IS, l!)0i»; Jose Steinbach. 



Orodynastes striaticollis columbianus subsp. nov. 



Similar to Orodynastes striaticollis striaticollis (Sclater), hut more 

 olivaceous, less rufescent, brownish above, and the wings and tail darker, 

 more blackish brown. 



Type, No. :'.7.H77, Collection Carnegie Museum, adult male; San Lo- 

 renzo, Santa Marta, Colombia, July 25, 1011; M. A. Carriker, Jr. 



Microtriccus brunneicapillus dilutus subsp. nov. 



Similar to Microtriccus brunneicapillus brunneicapillus (Lawrence) , 

 but decidedly duller and paler in general coloration. 



Y'<//t. No. 34,605, Collection Carnegie Museum, adult male; has 

 Quiguas, Venezuela, September I, 1910; M. A. Carriker, Jr. 



