234 SNODGRASS AND HELLER 



Family Hirundinidse 347 



71. Progne modesta 347 



72. Hirundo erythrogaster 348 



Family Mniotiltidae 348 



73. The Certhidea olivacea Series 350 



730. Certhidea olivacea olivacea 350 



73^. Certhidea olivacea luteola 351 



73c. Certhidea olivacea ridgwayi . . 352 



73*/. Certhidea olivacea fusca 352 



730. Certhidea olivacea mentalis 353 



73/". Certhidea olivacea becki 354 



74. The Certhidea cinerascens Series 354 



74. Certhidea cinerascens cinerascens 354 



74#. Certhidea cinerascens bifasciata 356 



75. Dendroica petechia aureola -35 



Family Troglodytidae 358 



76. Nesomimus trifasciatus 358 



77- Nesomimus macdonaldi 359 



78. Nesomimus adamsi 360 



79. The Nesomimus personatus Series 362 



79. Nesomimus personatus bauri 362 



79^. Nesomimus personatus personatus 363 



79c. Nesomimus personatus bindloei 365 



79/. Nesomimus personatus hulli 365 



80. The Nesomimus melanotis Series 367 



Soa. Nesomimus melanotis dierythrus 367 



8o3. Nesomimus melanotis barringtoni 368 



8oc. Nesomimus melanotis melanotis 369 



Sod. Nesomimus melanotis parvulus . 370 



INTRODUCTION. 



THE succession of families and genera followed in this paper 

 is that of the American Ornithologists' Union. Trinomials are 

 applied according to A. O. U. canons of nomenclature, t. e. 9 

 when forms overlap in their variations, regardless of the pos- 

 sibility or impossibility of their interbreeding, they are called 

 subspecies. A number is given to each species of a genus, and 

 this number is intended to stand, not for the form first named, 

 but for the sum of all the subspecies, where subspecies that 

 compose the species occur, not this number and a letter for 

 each of the other subspecies as in the A. O. U. Check List. 

 Each variety of a species is lettered. Thus : 63, Geospizafor- 

 tis consists of 630, G . fortis fortis ; 63$, G. fortis fratercula^ 

 etc. ; not 63, Geospiza fortis; 630, G. fortis f rater cula, etc. 



